Acquisitions and Divestitures (Schedule of Purchase Price Allocation) (Details) (USD $) In Millions, unless otherwise specified			9 Months Ended
	Sep. 30, 2014	Dec. 31, 2013	Sep. 30, 2014 Health Management Associates, Inc. [Member]
Business Acquisition [Line Items]
Cash paid			$ 2,778
Shares issued			736
Contingent value right			17
Total consideration			3,531
Current assets			1,514
Property and equipment			3,241
Goodwill	8,936	4,424	4,484
Intangible assets			100
Other long-term assets			196
Liabilities			(5,649)
Noncontrolling interests	(31)		(355)
Total identifiable net assets			$ 3,531