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Business Combinations - Fair Value of Assets and Liabilities Assumed (Details) - USD ($) $ in Millions | 12 Months Ended |
--- | --- | ---
Dec. 31, 2023 | Dec. 31, 2022 | Dec. 31, 2021 | Dec. 31, 2020
Business Acquisition [Line Items] |  |  |  |
Goodwill | $ 1,281.3 | $ 1,263.2 | $ 1,237.0 | $ 1,228.2
Hospital Sisters Health System, Covenant Health And Piedmont Healthcare, Inc |  |  |  |
Business Acquisition [Line Items] |  |  |  |
Property and equipment, net | 0.1 |  |  |
Goodwill | 18.1 |  |  |
Total assets acquired | 31.1 |  |  |
Hospital Sisters Health System, Covenant Health And Piedmont Healthcare, Inc | Noncompete agreements |  |  |  |
Business Acquisition [Line Items] |  |  |  |
Identifiable intangible assets | $ 0.5 |  |  |
Finite-lived intangible asset useful life (in years) | 3 years |  |  |
Hospital Sisters Health System, Covenant Health And Piedmont Healthcare, Inc | Trade Names |  |  |  |
Business Acquisition [Line Items] |  |  |  |
Identifiable intangible assets | $ 1.8 |  |  |
Finite-lived intangible asset useful life (in years) | 20 years |  |  |
Hospital Sisters Health System, Covenant Health And Piedmont Healthcare, Inc | Certificates of need |  |  |  |
Business Acquisition [Line Items] |  |  |  |
Identifiable intangible assets | $ 10.6 |  |  |
Finite-lived intangible asset useful life (in years) | 20 years |  |  |
Altru Health System, Trinity Medical Center And NCH Healthcare System |  |  |  |
Business Acquisition [Line Items] |  |  |  |
Goodwill |  | 26.2 |  |
Total assets acquired |  | 27.1 |  |
Altru Health System, Trinity Medical Center And NCH Healthcare System | Noncompete agreements |  |  |  |
Business Acquisition [Line Items] |  |  |  |
Identifiable intangible assets |  | $ 0.9 |  |
Altru Health System, Trinity Medical Center And NCH Healthcare System | Minimum | Noncompete agreements |  |  |  |
Business Acquisition [Line Items] |  |  |  |
Finite-lived intangible asset useful life (in years) |  | 2 years |  |
Altru Health System, Trinity Medical Center And NCH Healthcare System | Maximum | Noncompete agreements |  |  |  |
Business Acquisition [Line Items] |  |  |  |
Finite-lived intangible asset useful life (in years) |  | 3 years |  |
Shannon Medical, Heritage Valley & ECHD Ventures |  |  |  |
Business Acquisition [Line Items] |  |  |  |
Goodwill |  |  | 8.8 |
Other long-term assets |  |  | 0.1 |
Total assets acquired |  |  | 10.2 |
Shannon Medical, Heritage Valley & ECHD Ventures | Noncompete agreements |  |  |  |
Business Acquisition [Line Items] |  |  |  |
Identifiable intangible assets |  |  | 1.0 |
Shannon Medical, Heritage Valley & ECHD Ventures | Trade Names |  |  |  |
Business Acquisition [Line Items] |  |  |  |
Identifiable intangible assets |  |  | $ 0.3 |
Finite-lived intangible asset useful life (in years) |  |  | 20 years |
Shannon Medical, Heritage Valley & ECHD Ventures | Minimum | Noncompete agreements |  |  |  |
Business Acquisition [Line Items] |  |  |  |
Finite-lived intangible asset useful life (in years) |  |  | 3 years |
Shannon Medical, Heritage Valley & ECHD Ventures | Maximum | Noncompete agreements |  |  |  |
Business Acquisition [Line Items] |  |  |  |
Finite-lived intangible asset useful life (in years) |  |  | 5 years |

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