COVID-19 Pandemic (Details) - USD ($)		1 Months Ended			12 Months Ended
	Jul. 01, 2021	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Unusual or Infrequent Item, or Both [Line Items]
Revenue from government grants					$ 9,100,000	$ 10,000,000	$ 1,700,000
Health Care Services | HCA Healthcare, Inc.
Unusual or Infrequent Item, or Both [Line Items]
Percentage of ownership sold in transaction	80.00%	20.00%
Medicare advance payments	$ 63,600,000
Employer portion of payroll taxes delayed	$ 9,600,000
CARES Act
Unusual or Infrequent Item, or Both [Line Items]
Proceeds from recoupment of accelerated/advanced payments						3,100,000	20,800,000
Employer portion of payroll taxes delayed		$ 0			0			$ 72,700,000
Payment of payroll taxes			$ 31,600,000	$ 31,600,000
Employee Retention Credit, Amount Recognized					0	9,400,000	9,900,000
Employee retention credit, amount received					14,700,000	4,600,000
CARES Act | Prepaid Expenses and Other Current Assets
Unusual or Infrequent Item, or Both [Line Items]
Employee retention credit, amount received						14,700,000
CARES Act | Accelerated and Advance Payment Program
Unusual or Infrequent Item, or Both [Line Items]
Amount received from Accelerated and Advance Payment Program					$ 0			87,500,000
CARES Act | Health Care Services | Accelerated and Advance Payment Program
Unusual or Infrequent Item, or Both [Line Items]
Amount received from Accelerated and Advance Payment Program								75,200,000
CARES Act | CCRC Venture | Accelerated and Advance Payment Program
Unusual or Infrequent Item, or Both [Line Items]
Amount received from Accelerated and Advance Payment Program								$ 12,300,000
Loans Insured or Guaranteed by US Government Authorities | CARES Act
Unusual or Infrequent Item, or Both [Line Items]
Relief received from Provider Relief Fund						$ 61,100,000	$ 800,000