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Goodwill and Other Intangible Assets (Details) $ in Millions	9 Months Ended
	Sep. 30, 2015 USD ($)
Changes in the carrying value of goodwill by operating segment
Balance as of January 1, 2015	$ 1,635
Foreign currency and other	(51)
Balance as of September 30, 2015	1,584
Water Infrastructure
Changes in the carrying value of goodwill by operating segment
Balance as of January 1, 2015	1,098
Foreign currency and other	(36)
Balance as of September 30, 2015	1,062
Applied Water
Changes in the carrying value of goodwill by operating segment
Balance as of January 1, 2015	537
Foreign currency and other	(15)
Balance as of September 30, 2015	$ 522

X

- Definition

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.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef



-Publisher FASB



-Name Accounting Standards Codification



-Topic 350



-SubTopic 20



-Section 50



-Paragraph 1



-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

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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

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- Definition

Amount of increase (decrease) from foreign currency translation adjustments of an asset representing future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognized.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef



-Publisher FASB



-Name Accounting Standards Codification



-Topic 350



-SubTopic 20



-Section 50



-Paragraph 1



-Subparagraph (f)



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