Segment Information (Schedule of Segment Reporting Information by Segment) (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2017	Mar. 31, 2016
Segment Reporting Information [Line Items]
Net operating revenues	$ 4,486	$ 4,999
Income from continuing operations before income taxes	$ (176)	63
Hospital Operations [Member]
Segment Reporting Information [Line Items]
Net operating revenues		4,944
Income from continuing operations before income taxes		143
Corporate and All Other Reporting Units [Member]
Segment Reporting Information [Line Items]
Net operating revenues		55
Income from continuing operations before income taxes		$ (80)