Acquisitions and Divestitures (Schedule of Purchase Price Allocation) (Details) (USD $) In Millions, unless otherwise specified			6 Months Ended
	Jun. 30, 2014	Dec. 31, 2013	Jun. 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			1,315
Property and equipment			3,764
Goodwill	8,519	4,424	4,083
Intangible assets			93
Other long-term assets			160
Liabilities			(5,529)
Noncontrolling interests	(31)		(355)
Total identifiable net assets			$ 3,531