Segment Information (Schedule of Segment Reporting Information by Segment) (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2016	Sep. 30, 2015	Sep. 30, 2016	Sep. 30, 2015
Segment Reporting Information [Line Items]
Net operating revenues	$ 4,380	$ 4,846	$ 13,969	$ 14,639
(Loss) income from continuing operations before income taxes	(83)	121	(1,563)	502
Hospital Operations [Member]
Segment Reporting Information [Line Items]
Net operating revenues	4,314	4,805	13,791	14,494
(Loss) income from continuing operations before income taxes	(29)	212	(1,337)	781
Corporate and All Other Reporting Units [Member]
Segment Reporting Information [Line Items]
Net operating revenues	66	41	178	145
(Loss) income from continuing operations before income taxes	$ (54)	$ (91)	$ (226)	$ (279)