Income Taxes (Narrative) (Details) (USD $)	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Income Tax Disclosure [Abstract]
Deferred tax asset amount related to accumulated other comprehensive income	$ 1,800,000,000	$ 1,200,000,000
Investment of U.S. government accounts receivable in the CCF	100,000,000	459,000,000
Net operating and capital loss carryforwards	1,200,000,000
Tax credit carryforwards	215,000,000
Earnings (loss) from continuing operations before income taxes included foreign income	507,000,000	361,000,000	(215,000,000)
Earnings from non-U.S. subsidiaries not remitted to the United States	1,900,000,000
Statutory federal income tax rate	35.00%	35.00%	35.00%
Possible chance of tax position sustainable, percentage	50.00%
Tax positions for which it is reasonably possible that the unrecognized tax benefits will significantly increase or decrease		$ 0