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Condensed Financial Information of Parent Company - Condensed Statements of Comprehensive (Loss) Income (Details) - USD ($)
 12 Months Ended
Dec. 31, 2024
Dec. 31, 2023
Dec. 31, 2022
Condensed Statement Of Income Captions [Line Items]      
Net (loss) income $ (362,000,000) $ 16,000,000 $ 179,000,000
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 0 6,000,000 (17,000,000)
Amortization and recognition of unrecognized pension cost components, net of tax 4,000,000 1,000,000 10,000,000
Other comprehensive income (loss) 4,000,000 7,000,000 (7,000,000)
Comprehensive (loss) income (358,000,000) 23,000,000 172,000,000
Less: Comprehensive income attributable to noncontrolling interests 154,000,000 149,000,000 133,000,000
Comprehensive (loss) income attributable to Community Health Systems, Inc. stockholders (512,000,000) (126,000,000) 39,000,000
Parent Company      
Condensed Statement Of Income Captions [Line Items]      
Net (loss) income (516,000,000) (133,000,000) 46,000,000
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   6,000,000 (17,000,000)
Amortization and recognition of unrecognized pension cost components, net of tax 4,000,000 1,000,000 10,000,000
Other comprehensive income (loss) 4,000,000 7,000,000 (7,000,000)
Comprehensive (loss) income (512,000,000) (126,000,000) 39,000,000
Comprehensive (loss) income attributable to Community Health Systems, Inc. stockholders $ (512,000,000) $ (126,000,000) $ 39,000,000