Segment Information - Reconciliation of Adjusted EBITDA to Net Income (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended
	Mar. 31, 2014	Mar. 31, 2013
Segment Reporting [Abstract]
Adjusted EBITDA	$ 122	$ 109
Depreciation	(10)	(6)
OIBA	112	103
Amortization of intangible assets	(2)	(1)
Stock-based compensation	(14)	(14)
Other expense, net	(2)	(4)
Provision for income taxes	(26)	(22)
Net income	$ 68	$ 62