Amount after accumulated impairment loss of an asset representing future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognized.

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 350
-SubTopic 20
-Section 50
-Paragraph 1
-Subparagraph (a)
-URI http://asc.fasb.org/extlink&oid=35741047&loc=d3e13816-109267

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 350
-SubTopic 20
-Section 45
-Paragraph 1
-URI http://asc.fasb.org/extlink&oid=6388280&loc=d3e13770-109266

Reference 3: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 350
-SubTopic 20
-Section 45
-Paragraph 5
-URI http://asc.fasb.org/extlink&oid=64834752&loc=SL49117168-202975

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- Definition

Amount of increase in asset representing future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognized resulting from a business combination.

+ References

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- Definition

Amount of foreign currency translation gain (loss) which increases (decreases) an asset representing future economic benefits from other assets acquired in a business combination that are not individually identified and separately recognized.

+ References

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- Definition

A roll forward is a reconciliation of a concept from the beginning of a period to the end of a period.

+ References

No definition available.

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Goodwill and Other Intangible Assets (Rollforward of Goodwill) (Details) - USD ($) $ in Millions			12 Months Ended
	Nov. 01, 2016	Oct. 18, 2016	Dec. 31, 2016	Dec. 31, 2015
Changes in the carrying value of goodwill by operating segment
Beginning Balance			$ 1,584	$ 1,635
Goodwill Acquired			1,106	10
Foreign currency and other			(58)	(61)
Ending Balance			2,632	1,584
Water Infrastructure
Changes in the carrying value of goodwill by operating segment
Beginning Balance			1,066	1,098
Goodwill Acquired			38	10
Foreign currency and other			(30)	(42)
Ending Balance			1,074	1,066
Applied Water
Changes in the carrying value of goodwill by operating segment
Beginning Balance			518	537
Goodwill Acquired			0	0
Foreign currency and other			(13)	(19)
Ending Balance			505	518
Sensus
Changes in the carrying value of goodwill by operating segment
Beginning Balance			0	0
Goodwill Acquired			1,068	0
Foreign currency and other			(15)	0
Ending Balance			$ 1,053	$ 0
VIsenti
Changes in the carrying value of goodwill by operating segment
Goodwill Acquired		$ 6
Sensus
Changes in the carrying value of goodwill by operating segment
Goodwill Acquired	$ 1,062
Ending Balance	$ 1,062