Stockholders' Deficit - Schedule of Impact of Noncontrolling Interest to Stockholders' Deficit (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2020	Jun. 30, 2019	Jun. 30, 2020	Jun. 30, 2019
Equity [Abstract]
Net income (loss) attributable to Community Health Systems, Inc. stockholders	$ 70	$ (167)	$ 87	$ (285)
Net increase (decrease) in Community Health Systems, Inc. paid-in-capital for purchase of subsidiary partnership interests	1	(1)		(1)
Net transfers to the noncontrolling interests	1	(1)		(1)
Change to Community Health Systems, Inc. stockholders' deficit from net income (loss) attributable to Community Health Systems, Inc. stockholders and transfers to noncontrolling interests	$ 71	$ (168)	$ 87	$ (286)