Segment Information (Schedule of Segment Reporting Information by Segment) (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2016	Jun. 30, 2015	Jun. 30, 2016	Jun. 30, 2015
Segment Reporting Information [Line Items]
Net operating revenues	$ 4,590	$ 4,882	$ 9,589	$ 9,793
(Loss) income from continuing operations before income taxes	(1,543)	214	(1,480)	382
Hospital Operations [Member]
Segment Reporting Information [Line Items]
Net operating revenues	4,530	4,830	9,475	9,687
(Loss) income from continuing operations before income taxes	(1,452)	295	(1,309)	568
Corporate and All Other Reporting Units [Member]
Segment Reporting Information [Line Items]
Net operating revenues	60	52	114	106
(Loss) income from continuing operations before income taxes	$ (91)	$ (81)	$ (171)	$ (186)