Segment Reporting - Schedule of Other Operating Cost and Expense (Details) - USD ($) $ in Millions	3 Months Ended
Mar. 31, 2026	Mar. 31, 2025
Segment Reporting, Measurement Disclosures [Abstract]
Personnel and contract labor-related	$ 146.1	$ 147.2
Network-related	55.9	54.3
Service-related	60.9	60.4
Commercial	43.2	45.6
Facility, provision, franchise and other	136.1	136.8
Share-based compensation and other Employee Incentive Plan-related expense	31.6	34.0
Total other operating costs and expenses	$ 473.8	$ 478.3

Facility-Related Costs, Provision For Bad Debt And Franchise-Related Fees

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- Definition

Network-Related Costs

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- Definition

Amount of expense for award under share-based payment arrangement. Excludes amount capitalized.

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- Definition

The total amount of other operating cost and expense items that are associated with the entity's normal revenue producing operation.

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A fee charged for services from professionals such as doctors, lawyers and accountants. The term is often expanded to include other professions, for example, pharmacists charging to maintain a medicinal profile of a client or customer.

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Amount of expense for salary and wage arising from service rendered by nonofficer and officer employees. Excludes allocated cost, labor-related nonsalary expense, and direct and overhead labor cost included in cost of good and service sold.

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The aggregate total amount of expenses directly related to the marketing or selling of products or services.

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