Condensed Financial Information of Parent Company - Condensed Statements of Comprehensive (Loss) Income (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Condensed Statement Of Income Captions [Line Items]
Net (loss) income	$ 16	$ 179	$ 368
Equity in other comprehensive (loss) income of affiliates, net of income taxes:
Net change in fair value of available-for-sale debt securities, net of tax	6	(17)	(5)
Amortization and recognition of unrecognized pension cost components, net of tax	1	10	3
Other comprehensive income (loss)	7	(7)	(2)
Comprehensive (loss) income	23	172	366
Less: Comprehensive income attributable to noncontrolling interests	149	133	138
Comprehensive (loss) income attributable to Community Health Systems, Inc. stockholders	(126)	39	228
Parent Company
Condensed Statement Of Income Captions [Line Items]
Net (loss) income	(133)	46	230
Equity in other comprehensive (loss) income of affiliates, net of income taxes:
Net change in fair value of available-for-sale debt securities, net of tax	6	(17)	(5)
Amortization and recognition of unrecognized pension cost components, net of tax	1	10	3
Other comprehensive income (loss)	7	(7)	(2)
Comprehensive (loss) income	(126)	39	228
Comprehensive (loss) income attributable to Community Health Systems, Inc. stockholders	$ (126)	$ 39	$ 228