Income Taxes (Income Tax Contingency And Taxes Paid Narrative) (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended
	Mar. 31, 2014	Mar. 31, 2013	Dec. 31, 2013
Income Tax Contingency [Abstract]
Unrecognized Tax Benefits that Would Impact Effective Tax Rate	$ 15
Amount of interest and penalties included in liabilities for uncertain tax positions	8
Effective Income Tax Rate, Continuing Operations	42.20%	33.30%
Goodwill	8,373		4,430
Cash Paid for Income Taxes, Net of Refunds Received [Abstract]
Income tax (paid), net of refunds received	(79)	1
Health Management Associates, Inc. [Member]
Income Tax Contingency [Abstract]
Goodwill	$ 3,942