Income Tax (Narrative) (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 30, 2014	Sep. 30, 2013	Sep. 30, 2014	Sep. 30, 2013
Income Tax Disclosure [Abstract]
Effective income tax rate (percent)	(21.00%)	18.40%	(5.80%)	19.60%
Deferred tax assets, goodwill and intangible assets	$ 156		$ 156