
785 F.Supp.2d 722 (2011)
ARCHER DANIELS MIDLAND COMPANY, Plaintiff,
v.
BURLINGTON INSURANCE COMPANY GROUP, INC., c/b/a/ The Burlington Insurance Company, Defendant.
Case No.: 10 CV 1533.
United States District Court, N.D. Illinois, Eastern Division.
March 29, 2011.
*725 John Joseph O'Malley, Justin Kalani Beyer, Sayfarth Shaw LLP, Chicago, IL, for Plaintiff.
Rosa Maria Tumialan-Landy, Michael Cullen Borders, Stephen Michael Mahieu, Dykema Gossett PLLC, Chicago, IL, for Defendant.

MEMORANDUM OPINION AND ORDER
ROBERT M. DOW, JR., District Judge.
Before the Court is Defendant The Burlington Insurance Company's motion for judgment on the pleadings under Federal Rule of Civil Procedure 12(c). [10] For the reasons set forth below, the Court grants Defendant's motion [10].

I. Background[1]
Plaintiff Archer Daniels Midland Company ("ADM") entered into a contract with *726 Independent Building Maintenance Company ("IBM Co.") on June 6, 2002. The contract provided that IBM Co. would perform window cleaning services for ADM. The contract also provided that IBM Co. would obtain insurance to indemnify ADM for any liability arising from the work that IBM Co. performed for ADM under the contract. IBM Co. obtained a commercial general liability ("CGL") policy with The Burlington Insurance Company ("TBIC"). The policy included an endorsement that named ADM as an additional insured. The policy was effective from October 1, 2002, to October 1, 2003, and provided for a $1,000,000 occurrence limit.
On April 10, 2003, IBM Co. employee Miguel Gonzalez was cleaning windows for ADM when the ladder on which he was working slipped, causing him to injure his knee. Mr. Gonzalez filed a lawsuit against ADM on March 3, 2005, asserting negligence and premises liability counts ("the Gonzalez litigation" or "the underlying litigation"). Three months later, ADM tendered the defense of the Gonzalez litigation to TBIC. On June 23, 2005, TBIC accepted ADM's tender of defense. However, on July 11, 2005, TBIC rescinded its acceptance and disclaimed any duty to provide a defense. ADM settled its lawsuit with Mr. Gonzalez for $150,000 in October 2008, and alleges that it spent $197,648 in attorney's fees over the course of the litigation.
ADM filed a complaint against TBIC in the Circuit Court of Cook County on January 6, 2010. ADM's complaint seeks (1) a declaratory judgment that TBIC is liable to indemnify ADM for the Gonzalez settlement, (2) damages in the amount of $347,648, and (3) statutory penalties under 215 ILCS 5/155. TBIC removed the case to this Court on March 9, 2010.
On March 16, 2010, TBIC filed a counterclaim against ADM seeking a declaratory judgment that TBIC had no duty to defend ADM in the Gonzalez litigation because (1) the policy's "cross liability exclusion" barred coverage for bodily injury to an "employee of any insured" and (2) the "employer's liability exclusion" barred coverage for bodily injury to an "employee of the insured."
ADM asserted four affirmative defenses to TBIC's counterclaim. First, ADM contends that the exclusionary provisions do not apply under the circumstances of this case because of a "separation of insureds" clause in the policy. Second, ADM contends that the TBIC policy is ambiguous and thus should be construed in favor of ADM. Third, ADM contends that TBIC's counterclaim is barred by the doctrine of estoppel. Finally, ADM contends that if the exclusionary clause does bar coverage for ADM, then TBIC's policy is illusory and therefore unenforceable.

II. Legal Standard for Deciding a Rule 12(c) Motion for Judgment on the Pleadings
A motion for judgment on the pleadings under Federal Rule of Civil Procedure 12(c) "is designed to provide a means of disposing of cases when the material facts are not in dispute and a judgment on the merits can be achieved by focusing on the content of the pleadings and any facts of which the court will take judicial notice." Cincinnati Ins. Co. v. Contemporary Distrib. Inc., 2010 WL 338943, at *2 (N.D.Ill. Jan. 26, 2010) (internal quotation marks and citation omitted). A defendant *727 may seek dismissal of a complaint under Rule 12(c) after the pleadings are closed, but must do so early enough not to delay trial. See, e.g., Northern Indiana Gun & Outdoor Shows, Inc. v. City of South Bend, 163 F.3d 449, 452 (7th Cir. 1998). A court must grant a Rule 12(c) motion that a defendant files if "it appears beyond all doubt that the plaintiff cannot prove any facts that would support his claim for relief." Housing Auth. Risk Retention Group, Inc. v. Chicago Housing Auth., 378 F.3d 596, 600 (7th Cir.2004). In deciding the motion, a court must view all facts in the light most favorable to the non-moving party. Nat'l Fidelity Life Ins. Co. v. Karaganis, 811 F.2d 357, 358 (7th Cir.1987).

III. Analysis
The parties agree that there is no dispute concerning the material facts. The Court is called upon only to determine the scope of coverage of the insurance policy, which is a question of law. See Nicor, Inc. v. Associated Elec. and Gas Ins. Services Ltd., 223 Ill.2d 407, 307 Ill. Dec. 626, 860 N.E.2d 280, 285 (2006) (holding that "[t]he construction of the provisions of an insurance policy is a question of law"). Specifically, the Court must determine whether the exclusions in TBIC's CGL policy bar coverage for ADM in the underlying litigation and accordingly, whether TBIC was absolved of its duty to defend ADM in that litigation.

A. Insurance Policy Contract Interpretation
As an initial matter, the Court notes that this case comes before it pursuant to its diversity jurisdiction, 28 U.S.C. § 1332(a), and that Illinois law governs. Under Illinois law, an insurance policy is a contract, and the same rules of construction that apply to other types of contracts apply to insurance policies. See Nicor, Inc., 307 Ill.Dec. 626, 860 N.E.2d at 285. Thus, a court must "construe the policy as a whole, taking into account the type of insurance purchased, the nature of the risks involved, and the overall purpose of the contract." Id. The "primary objective is to ascertain and give effect to the intention of the parties as expressed in the agreement." Id., 307 Ill.Dec. 626, 860 N.E.2d at 286. A court must accord the insurance policy's terms their plain and ordinary meaning. Id., 307 Ill.Dec. 626, 860 N.E.2d at 285. When the policy is clear and unambiguous, a court must apply it as written unless doing so would contravene public policy. Id. However, if a policy term is ambiguous, a court must construe the policy "strictly against the insurer, who drafted the policy, and liberally in favor of coverage for the insured." Id. (internal citations omitted). Whether an ambiguity exists turns on whether the language in the policy is susceptible of more than one reasonable interpretation. Id. The test of ambiguity is not what the insurer intended its words to mean, but what a reasonable person in the position of the insured would understand them to mean. See Ins. Co. of Illinois v. Markogiannakis, 188 Ill.App.3d 643, 136 Ill.Dec. 307, 544 N.E.2d 1082, 1089 (Ill.App.Ct. 1st Dist.1989).
A court deciding whether an insurer has a duty to defend its insured must compare the factual allegations in the underlying complaint to the pertinent provisions of the policy. See Valley Forge Ins. Co. v. Swiderski Electronics, Inc., 223 Ill.2d 352, 307 Ill.Dec. 653, 860 N.E.2d 307, 314 (2006). A court should construe the underlying complaint "liberally * * * in favor of the insured, and doubts and ambiguities are to be construed in favor of the insured." Lyons v. State Farm Fire & Cas. Co., 349 Ill.App.3d 404, 285 Ill.Dec. 231, 811 N.E.2d 718, 721-22 (2004). If the complaint's allegations fall within or even *728 potentially within the policy's coverage provisions, then the insurer has a duty to defend its insured in a lawsuit. See id. (holding that "[a]n insurer may not justifiably refuse to defend an action against its insured unless it is clear from the face of the underlying complaints that the allegations fail to state facts which bring the case within, or potentially within, the policy's coverage" (citations omitted) (emphasis in original)).
When an insurer relies upon an exclusionary provision to deny coverage to an insured, the applicability of the provision must be free and clear from doubt. See Santa's Best Craft, LLC v. St. Paul Fire and Marine Ins. Co., 611 F.3d 339, 347 (7th Cir.2010) (citing Markogiannakis, 136 Ill.Dec. 307, 544 N.E.2d at 1094). If the exclusionary provision is at all ambiguous, a court should construe the provision most liberally in favor of the insured. See Lyons, 285 Ill.Dec. 231, 811 N.E.2d at 721-22; see also Markogiannakis, 136 Ill.Dec. 307, 544 N.E.2d at 1089 (holding that "[a]mbiguous provisions or equivocal expressions whereby an insurer seeks to limit its liability will be construed most strongly against the insurer and liberally in favor of the insured"). The insurer bears the burden of proving that an exclusionary provision applies. See Santa's Best Craft, 611 F.3d at 347.

B. The TBIC Policy
TBIC issued CGL policy number HGL0001965 to IBM Co., the named insured, for the policy period commencing on October 1, 2002, and ending on October 1, 2003. Reduced to its simplest terms, a CGL policy is a policy that is "usually obtained by a business, that covers damages that the insured becomes legally obligated to pay to a third party because of bodily injury or property damage." BLACK'S LAW DICTIONARY 809 (7th ed. 1999). A CGL policy generally covers liability for damages that are not covered by more specific types of liability insurance policies (e.g., business, automobile, and employer's liability). See Bituminous Cas. Corp. v. Maxey, 110 S.W.3d 203, 207 (Tex.App. 1st Dist.2003). Here, the section of the policy entitled "commercial general liability coverage form" establishes that the policy covers liability for "bodily injury" caused by an "occurrence" in the "coverage territory" that first occurred during the policy period. [See 6-2, at 27.]
The TBIC policy is modified by an additional insured endorsement, which provides that the section of the policy defining "an insured" "is amended to include as an insured any person or organization with whom you [the named insured] agreed, because of a written contract, written agreement or permit, to provide insurance such as is afforded under this Coverage Part, but only with respect to your operations, `your work' or facilities owned or used by you." [6-2, at 15]. The parties agree that IBM Co., the primary insured under the TBIC policy, added ADM as an additional insured pursuant to this provision in an endorsement to the policy. [See 6-3, at 31.]
The coverage form of the policy is also modified by several exclusions, only two of which are at issue here. First, the coverage form states that the policy excludes coverage for:
e. Employer's Liability
"Bodily injury' to:
(1) an `employee' of the insured arising out of and in the course of:
(a) Employment of the insured; or
(b) Performing duties related to the conduct of the insured's business * * *[.]
This exclusion applies:

*729 (1) Whether the insured may be liable as an employer or in any other capacity; and
(2) To any obligation to share damages with or repay someone else who must pay damages because of the injury.
[6-2, at 28 (emphasis added).]
Second, the policy includes a "cross liability exclusion" endorsement, which provides that:
This insurance does not apply to any actual or alleged `bodily injury', `property damage', `personal injury' or `advertising injury to * * *:
3. A present, former, future or prospective partner, officer, director, stockholder or employee of any insured."
[6-3, at 17 (emphasis added).] The endorsement is prefaced with the admonition that: "This endorsement changes the policy. Please read it carefully." Id. The endorsement also states that "[a]ll other terms and conditions of this policy remain unchanged." Id.
In addition to the provisions quoted above, the TBIC policy includes a "separation of insureds clause" (more commonly known as a "severability clause" (see Thoele v. Aetna Cas. & Sur., 39 F.3d 724, 727 n. 1 (7th Cir.1994))). The severability clause provides that:
Except with respect to the Limits of Insurance, and any rights or duties specifically assigned in this Coverage Part to the first Named Insured, this insurance applies:
a. As if each Named Insured were the only Named Insured; and
b. Separately to each insured against whom claim is made or `suit' is brought.
[6-3, at 4].
As discussed below, ADM argues in its complaint that the TBIC policy's severability clause modified the exclusion provisions of the policy such that ADM is not barred from receiving coverage under the policy for the Gonzalez litigation. Specifically, ADM argues that because Gonzalez was an employee not of ADM but rather of IBM Co., TBIC had a duty to defend ADM in the underlying litigation. ADM argues that TBIC breached its duty to defend, and so should be estopped from relying on the exclusion provisions as defenses in this litigation. Alternatively, ADM argues that the terms of the TBIC policy are at best ambiguous, and thus should be construed as providing coverage and triggering a duty to defend the underlying case. Finally, ADM argues that if the policy is indeed construed as excluding coverage for bodily injury by an employee, then the policy is illusory and unenforceable.
In its motion for judgment on the pleadings [10], TBIC contends that the severability clause has no impact on the cross liability exclusion because the language of the exclusion states that the policy does not cover bodily injury to an employee of "any insured." TBIC submits that because ADM is excluded from coverage for the Gonzalez litigation, TBIC had no duty to defend and therefore should not be estopped from asserting coverage defenses. TBIC further contends that application of the cross liability exclusion to ADM under the circumstances of this case does not render the policy illusory. The Court addresses in turn the parties' arguments as to application of the exclusion provisions, estoppel, and whether the policy is illusory.

C. The Severability Clause Modifies Application of the Employer's Liability Exclusion But Does Not Modify Application of the Cross Liability Exclusion
In general, severability clauses are intended "to treat each entity covered *730 under the policy as if each were insured separately." St. Katherine Ins. Co. Ltd. v. Ins. Co. of N. Am., Inc., 11 F.3d 707, 710 (7th Cir.1993) (citing United States Fid. & Guar. Co. v. Globe Indem. Co., 60 Ill.2d 295, 327 N.E.2d 321 (1975)). ADM and TBIC dispute whether the severability clause in the TBIC CGL policy modifies the policy's employer's liability exclusion clause and the cross liability exclusion endorsement so as to limit application of those exclusions only to IBM Co. (and not to ADM). The effect of the severability clause on those two exclusion provisions is governed by the different language used in each exclusion provision and, to a lesser extent, by the underlying purpose of each exclusion. As explained below, because the employer's liability exclusion  which prevents double recovery for individuals covered by a worker's compensation policy  bars coverage for bodily injury to an employee of "the insured," the severability clause operates to limit application of the exclusion to cases in which the injured person sues his employer ("employer-insured"), but not to cases in which the injured person sues an additional insured who is not his employer ("non-employer insured"). See Globe, 327 N.E.2d at 321-22. By contrast, because the cross liability exclusion  which excludes coverage for suits brought by one insured against another insured  bars coverage for bodily injury to an employee of "any insured," the severability clause does not modify application of the exclusion to only the employer-insured, but to the non-employer-insured as well.

1. The Employer's Liability Exclusion
In Globe, the Illinois Supreme Court considered the interplay of a severability clause and an employee exclusionary clause that barred coverage for bodily injury to employees of "the insured." 327 N.E.2d at 321-22. The court held that:
After due consideration to the language and intent of the policy, we conclude that the severability clause provides each insured with separate coverage, as if each were separately insured with a distinct policy, subject to the liability limits of the policy. The employee exclusion, therefore, does not exclude protection for an additional insured against an injury suffered by an employee of another insured. The exclusionary clause applies only to the situation where an insured is sued by its own employee.
Id. at 323. The court noted that if the insurer sought also to exclude coverage for an insured who was not the employer of the injured employee, that exclusion "could have been clearly stated." Id. at 323. The court thus implied  but did not decide  that drafting an exclusion that applied more broadly might be effective in barring coverage for employee's suits against non-employer-insureds despite the existence of a severability clause. Id.
In addition to the plain language of the policy, the purpose of the employee exclusion  namely, to prevent an employee who is covered by a worker's compensation program from recovering in a private suit against his employer  supports the rule in Globe. Id. at 322. As explained by a district court in the Southern District of New York, an employer's liability exclusion "recognizes that general liability coverage is unnecessary for an employer whose employee is injured in the course of his employment since the workman's compensation system (and the required workman's compensation's insurance coverage) covers such an injury." Shelby Realty LLC v. Nat'l Surety Corp., 2007 WL 1180651, at *4 (S.D.N.Y. Apr. 11, 2007). Read together, an employer's liability exclusion "precludes over-coverage (where an employer has both workman's compensation insurance and commercial liability insurance for an employee's injury) by excluding *731 claims stemming from an employee's bodily injury sustained `in the course of his employment,' and the [severability clause] precludes under-coverage (where a party is left without either workman's compensation insurance or commercial liability insurance) by limiting the employee exclusion to the actual employer of the injured party." Id.; see also 2 COUCH ON INS. § 115:22 (noting that "[t]he presence of a severability clause has been held to work a liberalizing effect, in that an additional insured who injures one of the named insured's employees may have coverage in spite of the exclusion * * *. However, coverage is not extended in all cases.").
Here, as in Globe, the TBIC CGL policy includes an employer's liability exclusion that bars coverage for bodily injury to "an `employee' of the insured." [6-2, at 28 (emphasis added).] The parties do not dispute that, according to the underlying complaint, Mr. Gonzalez was an employee of IBM Co., not ADM. Nor do the parties dispute that Mr. Gonzalez filed a lawsuit against ADM, not IBM Co. Given these undisputed facts, as a matter of law, both the plain language and the underlying purpose of the exclusion militate against a conclusion that the exclusion applies to ADM for purposes of the Gonzalez litigation. Rather, as in Globe, the severability clause modifies the exclusion such that coverage is barred only where the injured person seeks coverage from the employer-insured. Accordingly, the employer's liability exclusion does not bar coverage to ADM for the Gonzalez litigation.

2. The Cross Liability Exclusion
ADM urges the Court to apply the holding of Globe to the cross liability exclusion endorsement in the TBIC policy as well as the employer's liability exclusion. ADM argues that even though the cross liability exclusion bars coverage to injury of an employee of "any insured" and not just "the insured," the severability clause operates to limit the application of the exclusion to IBM Co. only and not to ADM. By contrast, TBIC argues that the severability clause has no effect on the cross liability exclusion in view of that exclusion's use of the term "any insured." In other words, TBIC states that the plain language of the cross liability exclusion means that there is not even the potential for coverage for ADM in the underlying Gonzalez litigation, and thus that TBIC had no duty to defend. See Gould & Ratner v. Vigilant Ins. Co., 336 Ill.App.3d 401, 270 Ill.Dec. 190, 782 N.E.2d 749, 758 (Ill.App.Ct. 1st Dist.2002) (holding that an insurer need not file a declaratory judgment action to preserve its rights "every time [it is] informed of a claim from an insured * * * where there clearly is no potential for coverage").
No Seventh Circuit or Illinois Supreme Court case directly addresses the question of how, in a CGL policy, a severability clause affects a cross liability exclusionary endorsement that bars coverage for a suit brought by an employee of "any insured."[2]*732 Two Illinois Appellate Court cases have applied the holding in Globe to exclusions that bar coverage for "a" or "any" insured under the policy. See Atchison, Topeka and Santa Fe Ry. Co. v. St. Paul Surplus Lines Ins. Co., 328 Ill.App.3d 711, 263 Ill.Dec. 101, 767 N.E.2d 827, 828 (Ill.App. Ct. 1st Dist.2002); Cook v. Country Mut. Ins. Co., 126 Ill.App.3d 446, 81 Ill.Dec. 1, 466 N.E.2d 587, 588 (Ill.App.Ct. 3d Dist. 1984). However, the Court finds both of those cases distinguishable in that they considered only employer's liability exclusions and not cross liability exclusions.
In Atchison, the court considered the impact of a severability clause on an employer's liability exclusion that barred coverage for bodily injury to employees of "a protected person." 263 Ill.Dec. 101, 767 N.E.2d at 828. ITS had a CGL policy with the defendant insurance company that covered Atchison under the "additional protected persons" endorsement. Id. The policy contained a severability clause. Id. The policy also contained an employer's liability exclusion that barred coverage for "bodily injury to an employee arising out of and in the course of his or her employment by a protected person." Id. (emphasis added). Several ITS employees were injured while performing work in Atchison's railway yards, and brought suit against Atchison. Id., 263 Ill.Dec. 101, 767 N.E.2d at 829. The circuit court held that the severability clause did not affect application of the exclusion, and that Atchison therefore was not covered by the policy in the underlying suits. Id., 263 Ill.Dec. 101, 767 N.E.2d at 830-31. The appellate court reversed, noting that in Globe the Illinois Supreme Court considered "the purpose of both the severability clause, to afford coverage separately to each insured, and the employer liability exclusion, to preclude an employee from suing his employer for injuries suffered as a result of the employer's negligence. In considering the intent of these provisions, we find any distinction between the use of the term `the insured' and `a protected person' to be insignificant." Id., 263 Ill.Dec. 101, 767 N.E.2d at 831 (emphasis added).
Similarly, in Cook, the appellate court held that a severability clause modified an employer's liability exclusion that barred coverage for "bodily injuries sustained by an employee of an insured in the course of employment for that insured." Cook, 81 Ill.Dec. 1, 466 N.E.2d at 588. Citing Globe, the court held that "[t]he language shows that the insurer recognizes an obligation to additional insureds distinct from its obligations to the named insured." Id. The court further held that the defendant's effort to read Globe narrowly so as to apply only to employer's liability exclusions that referenced "the insured" and not to exclusions that referenced "an insured" was tenuous and unpersuasive. Id.
In addition to these Illinois appellate court cases, another judge in this district has considered the interplay of a severability clause and a professional services exclusion as applied to an additional insured. In United States Fidelity and Guaranty *733 Co. v. Shorenstein Realty Servs., 700 F.Supp.2d 1003, 1007 (N.D.Ill.2010), plaintiff USF & G issued a policy under which Eckland Consultants, Inc., an architectural firm that was responsible for overseeing a restoration project at the John Hancock Center, was the named insured. Shorenstein  an entity that owns, operates and controls the John Hancock Center  was named an additional insured under the policy. Id. at 1004-05. The policy included a "professional services exclusion" barring coverage for personal injury caused by rendering or failing to render any professional services by or on behalf of "any insured." Id. at 1007. Scaffolding fell from the John Hancock Center and killed or injured pedestrians, and several individuals consequently filed suit against Shorenstein. Id. at 1004. Shorenstein sought defense in those suits from USF & G and was refused. Id. at 1005. The court held that it was clear under the policy that "as an additional insured, Shorenstein qualifies as an insured under * * * the Policy. The professional services exclusion applies to `any insured'; it makes no distinction between, or exception for, insureds who also happen to be additional insureds under the Policy. Accordingly, Shorenstein is subject to the professional exclusion * * *." Id. at 1009-10. However, the court held that even though Shorenstein was subject to the professional services exclusion, USF & G still had a duty to cover Shorenstein in the underlying suits because of the policy's severability clause. Id. at 1010-11. The court reasoned that:
[T]he Policy's Separation of Insureds provision must be interpreted as requiring that the coverage of each insured or additional insured be determined separately from other insureds. Under this interpretation, the fact that the professional services exclusion deprives Eckland of coverage under the Policy does not mean that Shorenstein, too, is without coverage. Rather, the professional services exclusion must be applied vis a vis Shorenstein's own conduct. When it is thus applied, Shorenstein remains covered because it did not perform professional services in connection with the project.
Id. at 1014-15. The court's rationale rested in part on the fact that the policy in question was a CGL policy and "was not intended to provide coverage to architects and engineers such as Eckland for liability arising specifically out of their performance of professional services." Id. at 1010.
For two reasons, the Court respectfully declines to follow Atchison, Cook, and Shorenstein (none of which is binding on this Court or directly on point) in holding that the severability clause at issue in the TBIC policy limits application of the cross liability exclusion to IBM Co. First, a court must give effect to the plain language of an insurance policy's exclusion provision. See First Nat'l Bank of Chicago v. Fid. & Cas. Co. of New York, 428 F.2d 499, 501 (7th Cir.1970) (holding that an insurer may limit coverage, and when it has done so the plain language of the limitation must be effectuated); see also 2 COUCH ON INS. § 22:31 (providing that "the rule that exceptions to and limitations upon the coverage otherwise provided by an insurance contract will be strictly construed against the insurer will not overcome plain contract language"). The majority rule is that the distinction between the terms "the insured" and "any insured" in an exclusion is crucial in determining the import of a severability clause. See Nautilus Ins. Co. v. K. Smith Builders, Ltd., 725 F.Supp.2d 1219, 1227-30 (D.Haw. 2010) (reviewing cases examining impact of severability clause on exclusions pertaining to "any insured" and applying majority rule that severability clause has no impact on such exclusions); Am. Family Mutual Ins. Co. v. Eastman, 698 N.W.2d 337, 337 (Iowa App.2005) (same); see also Michael *734 Carbone, Inc. v. Gen. Accident Ins. Co., 937 F.Supp. 413, 420 (E.D.Pa.1996) (holding that the distinction between an exclusion clause that refers to "the insured" and one that refers to "any insured" "is paramount").
In this case, the distinction between the terms "the insured" and "any insured" is all the more significant given that the terms are used in different exclusion provisions of the policy; as discussed above, the employer's liability exclusion refers to "the insured," whereas the cross liability exclusion refers to "any insured." According to fundamental principles of contract construction, the difference cannot be meaningless; the Court must accord significance to use of the different articles in the different exclusions. See 2 COUCH ON INS. § 22:43 (stating that "[s]ince it must be assumed that each word contained in an insurance policy is intended to serve a purpose, every term will be given effect if that can be done by any reasonable construction, and every clause will be enforced where that can be done without doing violence to the rights of either party"). And, notably, "[a]n insurance policy may exclude coverage for particular injuries or damages in certain specified circumstances while providing coverage in other circumstances, and thus, an insurer is not absolutely prohibited from drafting and enforcing policy provisions that provide or leave intact coverage for some, but not all, manifestations of a particular peril." Id. at § 22:30 (citing Julian v. Hartford Underwriters Ins. Co., 35 Cal.4th 747, 27 Cal.Rptr.3d 648, 110 P.3d 903, 910 (2005)).
Use of the term "any insured" in the cross liability exclusion "unambiguously expresses a contractual intent to create joint obligations and preclude coverage to innocent co-insureds." Michael Carbone, 937 F.Supp. at 421. Thus, although the severability clause of the TBIC policy modifies application of the employer's liability exclusion reference to "the insured" such that it does not bar coverage to ADM in the circumstances of this case, the severability clause has no such effect on the cross liability exclusion's application to "any insured." In other words, even though the policy applies separately to ADM and to IBM Co., both insureds are barred from coverage for bodily injury to an employee of either ADM or IBM Co. under the plain, "any insured" language of the cross liability exclusion.
Second, Atchison, Cook, and Shorenstein are distinguishable in that they concern exclusions whose purposes are distinct from the cross liability exclusion at issue here. A court construing an exclusionary provision of an insurance policy "must examine the purpose of the exclusion, the public policy considerations involved, and the transaction as a whole." 2 COUCH ON INS. § 22:30. Atchison and Cook, like Globe, concerned employer's liability exclusions. See Atchison, 263 Ill. Dec. 101, 767 N.E.2d at 828; Cook, 81 Ill.Dec. 1, 466 N.E.2d at 588; Globe 327 N.E.2d at 322. As discussed above, an employer's liability exclusion is intended to prevent unnecessary coverage when an employee already is covered by the worker's compensation system. See Globe 327 N.E.2d at 322; Shelby Realty LLC, 2007 WL 1180651, at *4. It follows that a severability clause operates to limit the employer's liability exclusion so that the exclusion does not apply to an insured who is not the employer of the injured person, because that injured person will not be eligible for worker's compensation. Shorenstein, meanwhile, concerned a professional services exclusion. See Shorenstein, 700 F.Supp.2d at 1007. As the name suggests (and as the court in Shorenstein discussed explicitly in support of its holding), a professional services exclusion bars professional *735 service providers from receiving the type of general liability coverage provided by a CGL policy. See Shorenstein, 700 F.Supp.2d at 1010.
A cross liability exclusion, by contrast, bars coverage for claims brought by one insured against another insured. See Underwriters at Lloyds London v. STD Enter., Inc., 395 F.Supp.2d 1142, 1144 (M.D.Fla.2005). The rationale that supports reading the severability clause to modify an employer's liability exclusion or professional services exclusion simply does not apply to the cross liability exclusion context. Indeed, the Court can conceive of no logical reason why the severability clause would operate to limit application of an exclusion whose very purpose is to prevent one insured (or its employee) from suing another insured (or its employee).
In sum, in view of the unambiguous language of the exclusion, the policy contract as a whole, the purpose of the exclusions, and the extant case law, the Court concludes that the severability clause limits application of the employer's liability exclusion provision such that the exclusion does not bar coverage for ADM in the Gonzalez litigation because ADM was not Mr. Gonzalez's employer. However, the severability clause has no impact on the cross liability exclusion endorsement because the endorsement refers to "any insured" and is intended to prevent coverage in precisely the type of scenario presented by the underlying litigation.

D. Construing the Cross Liability Exclusion as Barring Coverage for ADM for the Gonzalez Litigation Does Not Render the TBIC Policy Illusory
ADM asserts as an affirmative defense to TBIC's counterclaim for declaratory judgment that if the TBIC policy's exclusions apply to the circumstances of this case such that TBIC has no duty to defend ADM in the Gonzalez litigation, then the policy is illusory and unenforceable. TBIC counters that despite the exclusions, the policy provides coverage for (1) bodily injury claims brought by an individual who was not an employee of either IBM Co. or ADM, and (2) for certain property damage claims, and thus is not illusory.
Under Illinois law, an insurance policy is illusory if "there is no possibility under any set of facts for coverage." Employers' Fire Ins. Co. v. Berg, 2007 WL 273559, at *4 (N.D.Ill. Jan. 25, 2007) (citing WE Erickson Const., Inc. v. Chicago Title Ins. Co., 266 Ill.App.3d 905, 204 Ill.Dec. 431, 641 N.E.2d 861, 864 (Ill.App.Ct. 1st Dist.1994)). An illusory promise contravenes public policy and is unenforceable. See Nat'l Union Fire Ins. Co. of Pittsburgh, Penn. v. Glenview Park Dist., 158 Ill.2d 116, 198 Ill.Dec. 428, 632 N.E.2d 1039, 1046 (1994) (holding that an exclusion violates public policy and so renders the policy unenforceable where the "exclusion deceptively affects the general liability risks that the endorsement purports to assume"). However, a court should not deem a contract unenforceable "unless it is expressly contrary to the law or public policy." Am. Country Ins. Co. v. Cline, 309 Ill.App.3d 501, 242 Ill.Dec. 971, 722 N.E.2d 755, 760 (Ill.App.Ct. 1st Dist.1999). In general, "the construction of a contract that renders the agreement enforceable rather than void is preferred." Id. (citing Braye v. Archer-Daniels-Midland Co., 175 Ill.2d 201, 222 Ill.Dec. 91, 676 N.E.2d 1295, 1303-04 (1997)).
Here, although the cross liability exclusion bars coverage for ADM in the event of bodily injury to an IBM Co. employee (as in the underlying Gonzalez litigation), the exclusion does not preclude any possibility of coverage under other facts. Moreover, the "any insured" language of *736 the exclusion is plain and clear and does not surreptitiously take away the coverage that the additional insured endorsement or other policy provisions purport to grant. As such, the TBIC policy is not unenforceable as illusory.

E. TBIC Is Not Estopped From Asserting Coverage Defenses
ADM also asserts as an affirmative defense that TBIC should be estopped from arguing that the CGL policy does not provide coverage in the underlying litigation. If, comparing the allegations of the underlying complaint with the insurance policy, any potential for coverage for the lawsuit exists, then an insurer must either (1) seek a declaratory judgment regarding its obligations and rights under the policy or (2) defend the insured under a reservation of rights. See Pietras v. Sentry Ins. Co., 2007 WL 715759, at *4 (N.D.Ill. Mar. 6, 2007) (citing Fidelity & Cas. Co. v. Envirodyne Eng'rs, Inc., 122 Ill.App.3d 301, 77 Ill.Dec. 848, 461 N.E.2d 471, 473 (Ill.App.Ct. 1st Dist.1983)). If the insurer takes neither course and a court later determines that the insurer owed a duty to defend in the underlying claim, then "the insurer is estopped from raising policy exclusions or noncoverage as a defense in a coverage action." Id. (citing Central Mut. Ins. Co. v. Kammerling, 212 Ill.App.3d 744, 156 Ill.Dec. 826, 571 N.E.2d 806, 809 (Ill.App.Ct. 1st Dist.1991)).
Here, as set forth above, the cross liability exclusion unambiguously bars coverage for ADM in the underlying lawsuit. Accordingly, under the plain language of the policy, there was no potential for coverage under the TBIC policy. TBIC thus had no duty to defend ADM in the underlying litigation, and TBIC is not estopped from raising the cross liability exclusion as a defense.

F. Statutory Penalties 215 ILCS 5/155
Finally, ADM asserts a claim for statutory penalties pursuant to 215 ILCS 5/155. TBIC asks the Court to conclude on the basis of the pleadings that, as a matter of law, TBIC is not liable for statutory penalties.
Section 5/155 provides in relevant part that:
(1) In any action by or against a company wherein there is in issue the liability of a company on a policy or policies of insurance or the amount of the loss payable thereunder, or for an unreasonable delay in settling a claim, and it appears to the court that such action or delay is vexatious and unreasonable, the court may allow as part of the taxable costs in the action reasonable attorney fees, other costs, plus an amount not to exceed any one of the following amounts:
(a) 25% of the amount which the court or jury finds such party is entitled to recover against the company, exclusive of all costs;
(b) $25,000;
(c) the excess of the amount which the court or jury finds such party is entitled to recover, exclusive of costs, over the amount, if any, which the company offered to pay in settlement of the claim prior to the action.
215 ILCS 5/155.
Here, the Court can discern no allegation in the pleadings that TBIC acted in a vexatious or unreasonable manner in denying coverage to ADM for the Gonzalez litigation. According to the complaint, TBIC rescinded its initial acceptance of the defense of the Gonzalez litigation within a few weeks. And under the analysis set forth above, TBIC properly declined to *737 defend ADM or provide coverage for the Gonzalez litigation pursuant to the plain terms of its policy. In these circumstances, TBIC could not have acted in a vexatious or unreasonable manner. See Martin v. Ill. Farmers Ins., 318 Ill.App.3d 751, 252 Ill.Dec. 310, 742 N.E.2d 848, 858 (Ill.App.Ct. 1st Dist.2000). Therefore, as a matter of law, ADM is not entitled to statutory penalties under Section 5/155.

IV. Conclusion
For the reasons above, the Court grants TBIC's motion [10] for judgment on the pleadings.
NOTES
[1]  For purposes of a Rule 12(c) motion, the Court will consider facts set forth in the complaint, answer, and exhibits attached to those pleadings. See Housing Auth. Risk Retention Group Inc. v. Chicago Housing Auth., 378 F.3d 596, 600 (7th Cir.2004); Cincinnati Ins. Co. v. Contemporary Distribution, Inc., 2010 WL 338943, at *2 (N.D. Ill. Jan. 26, 2010). The Court views all facts in the light most favorable to the nonmoving party. Nat'l Fidelity Life Ins. Co. v. Karaganis, 811 F.2d 357, 358 (7th Cir.1987).
[2]  One Seventh Circuit case has passed on the issue of whether a business pursuits exclusion phrased in terms of "any insured" barred coverage for a negligence action against the husband of a woman who was engaged in a business pursuit. See Thoele v. Aetna Cas. & Sur., 39 F.3d 724, 725-26 (7th Cir.1994). In Thoele, the Seventh Circuit affirmed the district court's grant of summary judgment in favor of the insurer in a case concerning whether a "business pursuits" exception of a homeowner's insurance policy applied to the husband of a woman who was engaged in a business pursuit at the time of the incident for which coverage was sought. 39 F.3d at 725-26. The Seventh Circuit held that "[i]f the exclusion merely applied to the business pursuits of `the insured,' the [parties seeking coverage] might have a point. But the exclusion instead applies to injuries arising out of the business pursuits of `any insured.' The district court was quite right to conclude that the choice of the word `any' broadened the exclusion to include injuries triggered by one insured in connection with the business pursuits of another." Id. Thoele suggests that an exclusion bars coverage for each insured if it refers to exclusions for "any insured." Id. However, Thoele did not consider the exclusionary clause at issue in the homeowner's policy in light of a severability clause. Thus, Thoele left open the question of whether a severability clause limits application of an exclusionary endorsement that otherwise applies to "any insured." Id.; see also Allstate Ins. Co. v. Smiley, 276 Ill.App.3d 971, 213 Ill.Dec. 698, 659 N.E.2d 1345, 1348 (Ill.App. Ct. 2d Dist. 1995) (holding, without considering a severability clause, that business pursuits exclusion of homeowner's policy applied to husband of wife who operated daycare business in home).
