Income Taxes (Income Tax Contingency And Taxes Paid Narrative) (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 30, 2014	Sep. 30, 2013	Sep. 30, 2014	Sep. 30, 2013	Dec. 31, 2013
Income Tax Contingency [Abstract]
Unrecognized benefit that would affect the effective tax rate	$ 13		$ 13
Amount of interest and penalties included in liabilities for uncertain tax positions	8		8
Effective Income Tax Rate, Continuing Operations	29.80%	20.00%	14.70%	30.00%
Goodwill	8,936		8,936		4,424
Cash Paid for Income Taxes, Net of Refunds Received [Abstract]
Cash paid for income taxes (refunds received), net	(16)	2	(89)	72
Adjusted for the Expense Related to Income Attributable to Noncontrolling Interest [Member]
Income Tax Contingency [Abstract]
Effective Income Tax Rate, Continuing Operations			47.10%	37.60%
Health Management Associates, Inc. [Member]
Income Tax Contingency [Abstract]
Goodwill	$ 4,484		$ 4,484