Segment Reporting - Schedule of Other Operating Cost and Expense (Details) - USD ($) $ in Millions	12 Months Ended
Dec. 31, 2025	Dec. 31, 2024	Dec. 31, 2023
Segment Reporting, Measurement Disclosures [Abstract]
Personnel and contract labor	$ 558.6	$ 579.2	$ 557.6
Network-related	215.9	237.2	259.0
Service-related	252.7	267.2	227.6
Commercial	179.6	189.6	181.1
Facility, provision, franchise and other	553.2	619.0	563.8
Share-based compensation and other Employee Incentive Plan-related expense	75.0	84.0	88.7
Total other operating costs and expenses	$ 1,835.0	$ 1,976.2	$ 1,877.8

Facility Related Costs Provision For Bad Debt And Franchise Related Fees

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Network Related Costs

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

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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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