Earnings Per Share (Details) (USD $) In Millions, except Share data in Thousands, unless otherwise specified	3 Months Ended				9 Months Ended
	Sep. 30, 2012		Sep. 30, 2011		Sep. 30, 2012		Sep. 30, 2011
Basic and diluted net earnings per share:
Net income	$ 72		$ 77		$ 224		$ 227
Shares
Weighted average common shares outstanding	185,650		184,570	[1]	185,386		184,570	[1]
Add: Participating securities	281	[2]	0	[1],[2]	340	[2]	0	[1],[2]
Weighted average common shares outstanding - Basic	185,931		184,570	[1]	185,726		184,570	[1]
Plus incremental shares from assumed conversions:
Weighted average common shares outstanding - Diluted	186,348		184,570	[1]	186,152		184,570	[1]
Basic earnings per share	$ 0.39		$ 0.42	[1]	$ 1.20		$ 1.23	[1]
Diluted earnings per share	$ 0.38		$ 0.42	[1]	$ 1.20		$ 1.23	[1]
Stock Options [Member]
Plus incremental shares from assumed conversions:
Dilutive effect of common shares	186	[3]	0	[1],[3]	231	[3]	0	[1],[3]
Restricted Stock [Member]
Plus incremental shares from assumed conversions:
Dilutive effect of common shares	231	[3]	0	[1],[3]	195	[3]	0	[1],[3]

[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.

[2] Restricted stock awards containing rights to non-forfeitable dividends which participate in undistributed earnings with common shareholders are considered participating securities for purposes of computing earnings per share.

[3] Incremental shares from stock options and restricted stock are computed by the treasury stock method. The average shares listed below were not included in the computation of diluted earnings per share because to do so would have been anti-dilutive for the periods presented or because they were excluded under the treasury stock method. The treasury stock method calculates dilution assuming the exercise of all in-the-money options and vesting of restricted stock awards, reduced by the repurchase of shares with the proceeds from the assumed exercises, unrecognized compensation expense for outstanding awards and the estimated tax benefit of the assumed exercises.