Acquisitions and Divestitures (Schedule of Purchase Price Allocation) (Details) (USD $) In Millions, unless otherwise specified			3 Months Ended
	Mar. 31, 2014	Dec. 31, 2013	Mar. 31, 2014 Health Management Associates, Inc. [Member]
Business Acquisition [Line Items]
Cash paid			$ 2,778
Shares issued			736
Contingent value right			16
Total consideration			3,530
Current assets			1,299
Property and equipment			3,672
Goodwill	8,373	4,430	3,942
Intangible assets			93
Other long-term assets			146
Liabilities			(5,267)
Noncontrolling interests	(20)		(355)
Total identifiable net assets			$ 3,530