Income Taxes (Narrative) (Details) $ in Millions	9 Months Ended
	Sep. 30, 2015 USD ($)
Income Tax Disclosure [Abstract]
Tax Adjustments, Settlements, and Unusual Provisions	$ (30)
Uncertain Tax Liability, Period (Increase) Decrease	53
Uncertain Tax Liability, Decrease Resulting from Foreign Currency Translation	14
Uncertain Tax Liability, Decrease Resulting from Settlements with Taxing Authorities	$ 45