Commitments and Contingencies - Additional Information (Details) - USD ($)	3 Months Ended		12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Commitments And Contingencies [Line Items]
Physician recruiting commitment, physician income guarantee period			12 months
Physician recruiting commitment, period of recoverability of physician income guarantee for noncommitment			3 years
Physician recruiting commitment, maximum potential future payments in excess of liability recorded	$ 6,000,000		$ 6,000,000
Malpractice Loss Contingency, Discount Rate			3.80%	1.80%	1.80%
Malpractice Loss Contingency, Accrual, Discounted	467,000,000	$ 533,000,000	$ 467,000,000	$ 533,000,000
Malpractice Loss Contingency, Accrual, Undiscounted	516,000,000	564,000,000	516,000,000	564,000,000
Malpractice Loss Contingency, Accrual, Discounted, Current	159,000,000	162,000,000	159,000,000	162,000,000
Expenses related to settlement of professional liability claim					$ 50,000,000
Recovery of full settlement amount					$ 50,000,000
Recovery from third-party insurers of professional liability claim		$ 22,000,000
Change in estimate reserve for professional liability claims			0	$ 0
Change in estimate for professional liability claims	$ 15,000,000		15,000,000
Professional and general liability self-insured claims reported prior to June 1, 2002, per occurrence [Member]
Commitments And Contingencies [Line Items]
Malpractice loss contingency, self-insured retention			1,000,000
Professional and general liability self-insured reported from June 1, 2002 through June 1, 2003, per occurrence [Member]
Commitments And Contingencies [Line Items]
Malpractice loss contingency, self-insured retention			2,000,000
Professional and general liability self-insured reported from June 1, 2003 and before June 1, 2005, per occurrence [Member]
Commitments And Contingencies [Line Items]
Malpractice loss contingency, self-insured retention			4,000,000
Professional and general liability self-insured claims reported on or after June 1, 2005, per occurrence [Member]
Commitments And Contingencies [Line Items]
Malpractice loss contingency, self-insured retention			5,000,000
Professional and general liability claims reported on or after June 1, 2014 [Member]
Commitments And Contingencies [Line Items]
Malpractice loss contingency, self-insured retention			10,000,000
Professional and general liability claims reported on or after June 1, 2003 [Member]
Commitments And Contingencies [Line Items]
Malpractice Insurance, Maximum Coverage Per Incident			95,000,000
Professional and general liability claims incurred and reported after January 1, 2008 [Member]
Commitments And Contingencies [Line Items]
Malpractice Insurance, Maximum Coverage Per Incident			145,000,000
Professional and general liability claims incurred and reported after June 1, 2010 [Member]
Commitments And Contingencies [Line Items]
Malpractice Insurance, Maximum Coverage Per Incident			195,000,000
Professional and general liability claims reported on or after June 1, 2015 [Member]
Commitments And Contingencies [Line Items]
Malpractice Insurance, Maximum Coverage Per Incident			216,000,000
Integrated professional liability claims reported on or after June1 2014 [Member]
Commitments And Contingencies [Line Items]
Malpractice Insurance, Annual Coverage Limit			50,000,000
Integrated occurrence claims reported on or after June 1, 2015 through June 1, 2020 [Member]
Commitments And Contingencies [Line Items]
Malpractice Insurance, Annual Coverage Limit			75,000,000
Integrated occurrence claims reported between June 1,2020 and June 1,2023 [Member]
Commitments And Contingencies [Line Items]
Malpractice Insurance, Annual Coverage Limit			75,000,000
Professional and general liability self-insured claims under certain policy terms until Company total aggregate coverage is met if first aggregate layer becomes fully utilized [Member]
Commitments And Contingencies [Line Items]
Malpractice loss contingency, self-insured retention			$ 10,000,000
Maximum
Commitments And Contingencies [Line Items]
Malpractice loss contingency, average lag period from occurrence to settlement			4 years
Malpractice loss contingency, settled claims as percent of total liability			7.00%
Malpractice loss contingency, self-insured retention			$ 15,000,000
Maximum | Professional And General Liability Claims Incurred And Reported On Or After June 1, 2008 [Member]
Commitments And Contingencies [Line Items]
Malpractice loss contingency, self-insured retention			$ 15,000,000
Minimum
Commitments And Contingencies [Line Items]
Malpractice loss contingency, average lag period from occurrence to settlement			3 years
Malpractice loss contingency, self-insured retention			$ 10,000,000
Minimum | Professional and general liability self-insured claims under certain policy terms until Company total aggregate coverage is met if first aggregate layer becomes fully utilized [Member]
Commitments And Contingencies [Line Items]
Malpractice loss contingency, self-insured retention			$ 15,000,000
Northwest Health – Starke [Member]
Commitments And Contingencies [Line Items]
Capital commitment, future period after acquisition for completing open capital improvement projects date			Sep. 30, 2026
Northwest Health – Starke [Member] | Maximum
Commitments And Contingencies [Line Items]
Capital commitment, future period after acquisition for completing open capital improvement projects			5 years