Condensed Financial Information of Parent - Condensed Balance Sheets (Details) - USD ($) $ in Millions	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
ASSETS
Prepaid income taxes	$ 94	$ 50
Total current assets	3,479	4,510
Deferred income taxes	53	59
Other assets, net	1,913	1,896
Total assets	15,217	16,006
LIABILITIES AND STOCKHOLDERS’ DEFICIT
Deferred income taxes	192	29
Other long-term liabilities	827	1,599
Total liabilities	16,027	17,060
Community Health Systems, Inc. stockholders’ deficit:
Preferred stock
Common stock	1	1
Additional paid-in capital	2,118	2,094
Accumulated other comprehensive loss	(14)	(13)	$ (9)
Accumulated deficit	(3,477)	(3,707)
Total Community Health Systems, Inc. stockholders’ deficit	(1,372)	(1,625)
Total liabilities and stockholders' deficit	15,217	16,006
Parent Company
ASSETS
Prepaid income taxes	94	50
Total current assets	94	50
Deferred income taxes	53	59
Other assets, net		(3)
Total assets	147	106
LIABILITIES AND STOCKHOLDERS’ DEFICIT
Intercompany payable	1,326	1,701
Deferred income taxes	192	29
Other long-term liabilities	1	1
Total liabilities	1,519	1,731
Community Health Systems, Inc. stockholders’ deficit:
Preferred stock
Common stock	1	1
Additional paid-in capital	2,118	2,094
Accumulated other comprehensive loss	(14)	(13)
Accumulated deficit	(3,477)	(3,707)
Total Community Health Systems, Inc. stockholders’ deficit	(1,372)	(1,625)
Total liabilities and stockholders' deficit	$ 147	$ 106