Goodwill and Other Intangible Assets (Tables)

12 Months Ended

Dec. 31, 2012

Goodwill and Intangible Assets Disclosure [Abstract]

Changes in the carrying value of goodwill by operating segment

Changes in the carrying value of goodwill by operating segment during the years ended December 31, 2012 and 2011 are as follows:

(in millions)	Water Infrastructure			Applied Water			Total
Balance as of December 31, 2010	$	873		$	564		$	1,437
Activity in 2011
Acquisitions	190			—			190
Foreign currency and other	(9		)	(8		)	(17		)
Balance as of December 31, 2011	$	1,054		$	556		$	1,610
Activity in 2012
Acquisitions	19			—			19
Foreign currency and other	12			6			18
Balance as of December 31, 2012	$	1,085		$	562		$	1,647

Other Intangible Assets

Information regarding our other intangible assets is as follows:

(in millions)	December 31, 2012							December 31, 2011
	Carrying Amount		Accumulated Amortization			Net Intangibles		Carrying Amount		Accumulated Amortization			Net Intangibles
Customer and distributor relationships	$	317	$	(75	)	$	242	$	309	$	(51	)	$	258
Proprietary technology	105		(29		)	76		102		(23		)	79
Trademarks	33		(14		)	19		32		(11		)	21
Patents and other	21		(17		)	4		21		(15		)	6
Indefinite-lived intangibles	143		—			143		141		—			141
Other intangibles	$	619	$	(135	)	$	484	$	605	$	(100	)	$	505

Estimated Amortization Expense

Estimated amortization expense for each of the five succeeding years is as follows:

(in millions)
2013	$	34
2014	32
2015	32
2016	31
2017	31