Income Taxes (Net Provision For Income Taxes For Continuing Operations) (Details) (USD $) In Millions, unless otherwise specified	12 Months Ended
Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Current:
U.S. federal	$ 856us-gaap_CurrentFederalTaxExpenseBenefit	$ 850us-gaap_CurrentFederalTaxExpenseBenefit	$ 876us-gaap_CurrentFederalTaxExpenseBenefit
State	31	28	(9)
International	106us-gaap_CurrentForeignTaxExpenseBenefit	132us-gaap_CurrentForeignTaxExpenseBenefit	131us-gaap_CurrentForeignTaxExpenseBenefit
Total current	993us-gaap_CurrentIncomeTaxExpenseBenefit	1,010us-gaap_CurrentIncomeTaxExpenseBenefit	998us-gaap_CurrentIncomeTaxExpenseBenefit
Deferred:
U.S. federal	110	119	(168)
State	(3)	1	(5)
International	29	(5)	29
Total deferred	136us-gaap_DeferredIncomeTaxExpenseBenefit	115us-gaap_DeferredIncomeTaxExpenseBenefit	(144)us-gaap_DeferredIncomeTaxExpenseBenefit
Provision for income taxes, net	1,129us-gaap_IncomeTaxExpenseBenefit	1,125us-gaap_IncomeTaxExpenseBenefit	854us-gaap_IncomeTaxExpenseBenefit
Net income tax payments	$ 1,019us-gaap_IncomeTaxesPaidNet	$ 888us-gaap_IncomeTaxesPaidNet	$ 1,155us-gaap_IncomeTaxesPaidNet

Amount of current federal tax expense (benefit) pertaining to income (loss) from continuing operations.

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