Income Taxes (Narrative) (Details) $ in Millions	3 Months Ended
Mar. 31, 2016 USD ($)
Income Tax Disclosure [Abstract]
Unrecognized Tax Benefits, Increase Resulting from Foreign Currency Translation	$ 11

Amount of increase in unrecognized tax benefits resulting from foreign currency translation.

No definition available.

Name:	us-gaap_UnrecognizedTaxBenefitsIncreasesResultingFromForeignCurrencyTranslation
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration