Stockholders' Equity (Schedule of Impact of Noncontrolling Interest to Stockholders' Equity) (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2016	Sep. 30, 2015	Sep. 30, 2016	Sep. 30, 2015
Stockholders' Equity [Abstract]
Net (loss) income attributable to Community Health Systems, Inc. stockholders	$ (79)	$ 52	$ (1,500)	$ 241
Net increase in Community Health Systems, Inc. paid-in capital for purchase of subsidiary partnership interests			2
Net transfers from (to) the noncontrolling interests			2
Change to Community Health Systems, Inc. stockholders' equity from net income attributable to Community Health Systems, Inc. stockholders and transfers to noncontrolling interests			$ (1,498)