Condensed Financial Information of Parent - Condensed Statements of Comprehensive Income (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Condensed Statement Of Income Captions [Line Items]
Net income	$ 179	$ 368	$ 607
Equity in other comprehensive (loss) income of affiliates, net of income taxes:
Net change in fair value of interest rate swaps, net of tax			(1)
Net change in fair value of available-for-sale debt securities, net of tax	(17)	(5)	4
Amortization and recognition of unrecognized pension cost components, net of tax	10	3	(7)
Other comprehensive loss	(7)	(2)	(4)
Comprehensive income	172	366	603
Less: Comprehensive income attributable to noncontrolling interests	133	138	96
Comprehensive income attributable to Community Health Systems, Inc. stockholders	39	228	507
Parent Company
Condensed Statement Of Income Captions [Line Items]
Net income	46	230	511
Equity in other comprehensive (loss) income of affiliates, net of income taxes:
Net change in fair value of interest rate swaps, net of tax			(1)
Net change in fair value of available-for-sale debt securities, net of tax	(17)	(5)	4
Amortization and recognition of unrecognized pension cost components, net of tax	10	3	(7)
Other comprehensive loss	(7)	(2)	(4)
Comprehensive income	39	228	507
Comprehensive income attributable to Community Health Systems, Inc. stockholders	$ 39	$ 228	$ 507