Quarterly Financial Data (Details) (USD $) In Millions, except Per Share data, unless otherwise specified	2 Months Ended	3 Months Ended								10 Months Ended	12 Months Ended
	Dec. 31, 2011	Dec. 31, 2013	Sep. 30, 2013	Jun. 30, 2013	Mar. 31, 2013	Dec. 31, 2012	Sep. 30, 2012	Jun. 30, 2012	Mar. 31, 2012	Oct. 30, 2011	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Quarterly Financial Information Disclosure [Abstract]
Revenue		$ 1,033	$ 965	$ 960	$ 879	$ 969	$ 931	$ 966	$ 925		$ 3,837	$ 3,791	$ 3,803
Gross Profit		410	384	371	334	382	374	383	363		1,499	1,502	1,461
Operating income		129	98	70	66	104	111	129	99		363	443	395
Net income	$ 59	$ 68	$ 73	$ 46	$ 41	$ 73	$ 72	$ 89	$ 63	$ 220	$ 228	$ 297	$ 279
Basic (in dollars per share)		$ 0.37	$ 0.39	$ 0.25	$ 0.22	$ 0.39	$ 0.39	$ 0.48	$ 0.34		$ 1.23	$ 1.60	$ 1.51
Diluted (in dollars per share)		$ 0.37	$ 0.39	$ 0.25	$ 0.22	$ 0.39	$ 0.38	$ 0.48	$ 0.34		$ 1.22	$ 1.59	$ 1.50