Segment Information (Schedule of Segment Reporting Information by Segment) (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2017	Jun. 30, 2016	Jun. 30, 2017	Jun. 30, 2016
Segment Reporting Information [Line Items]
Net operating revenues	$ 4,144	$ 4,590	$ 8,629	$ 9,589
Income from continuing operations before income taxes	$ (131)	(1,543)	$ (307)	(1,480)
Hospital Operations [Member]
Segment Reporting Information [Line Items]
Net operating revenues		4,530		9,475
Income from continuing operations before income taxes		(1,452)		(1,309)
Corporate and All Other Reporting Units [Member]
Segment Reporting Information [Line Items]
Net operating revenues		60		114
Income from continuing operations before income taxes		$ (91)		$ (171)