Income Taxes (Deferred Income Taxes Narrative) (Details) (USD $) In Millions, unless otherwise specified	12 Months Ended
	Dec. 31, 2014
Income Tax Disclosure [Abstract]
Valuation allowance change	$ 48
Valuation allowance, deferred tax asset, change in amount, income tax expense	49
Valuation allowance, deferred tax asset, change in amount, foreign currency translation adjustment	31
Net operating loss expirations	$ 71