Quarterly Financial Data (Details) (USD $) In Millions, except Per Share data, unless otherwise specified	0 Months Ended	2 Months Ended	3 Months Ended								10 Months Ended	12 Months Ended
	Oct. 31, 2011	Dec. 31, 2011	Dec. 31, 2012	Sep. 30, 2012	Jun. 30, 2012	Mar. 31, 2012	Dec. 31, 2011	Sep. 30, 2011	Jun. 30, 2011	Mar. 31, 2011	Oct. 30, 2011	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
Quarterly Financial Information Disclosure [Abstract]
Revenue			$ 969	$ 931	$ 966	$ 925	$ 1,003	$ 939	$ 971	$ 890		$ 3,791	$ 3,803	$ 3,202
Gross Profit			382	374	383	363	380	365	379	337		1,502	1,461	1,214
Operating income			104	111	129	99	100	79	116	100		443	395	388
Net income		$ 59	$ 73	$ 72	$ 89	$ 63	$ 52	$ 77	$ 72	$ 78	$ 220	$ 297	$ 279	$ 329	[1]
Basic (in dollars per share)			$ 0.39	$ 0.39	$ 0.48	$ 0.34	$ 0.28	$ 0.42	$ 0.39	$ 0.42		$ 1.60	$ 1.51	$ 1.78	[1]
Diluted (in dollars per share)			$ 0.39	$ 0.38	$ 0.48	$ 0.34	$ 0.28	$ 0.42	$ 0.39	$ 0.42		$ 1.59	$ 1.50	$ 1.78	[1]
Common stock issued	184.6

[1] Basic and diluted earnings per share for all periods prior to the Spin-off reflect the number of distributed shares on the Distribution Date, or 184.6 million shares. At the time of the Spin-off, ITT stock options and restricted stock awards were converted to awards of Xylem, and therefore there were no dilutive securities outstanding for the period prior to Spin-off.