Income Taxes (Income Tax Provision Narrative) (Details) (USD $)	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Income Tax Disclosure [Abstract]
Accumulated but undistributed earnings permanently reinvested in business	$ 3,800,000,000
Effective income tax rate	33.00%	32.00%	(17.00%)
Foreign tax credit carryforwards		$ 142,000,000
Foreign tax credit carryforward period	ten year carryforward period
Foreign tax credit carryforward expiration	Dec. 31, 2014