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Goodwill and Other Intangible Assets (Goodwill Rollforward) (Details) $ in Millions	6 Months Ended
	Jun. 30, 2022 USD ($)
Changes in the carrying value of goodwill by operating segment
Balance as of January 1, 2022	$ 2,792
Foreign currency and other	(78)
Balance as of June 30, 2022	2,714
Water Infrastructure
Changes in the carrying value of goodwill by operating segment
Balance as of January 1, 2022	656
Foreign currency and other	(19)
Balance as of June 30, 2022	637
Applied Water
Changes in the carrying value of goodwill by operating segment
Balance as of January 1, 2022	515
Foreign currency and other	(15)
Balance as of June 30, 2022	500
Measurement & Control Solutions
Changes in the carrying value of goodwill by operating segment
Balance as of January 1, 2022	1,621
Foreign currency and other	(44)
Balance as of June 30, 2022	$ 1,577

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/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 942
-SubTopic 210
-Section S99
-Paragraph 1
-Subparagraph (SX 210.9-03(10)(1))
-URI http://asc.fasb.org/extlink&oid=120398452&loc=d3e534808-122878

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-Publisher FASB
-Name Accounting Standards Codification
-Topic 350
-SubTopic 20
-Section 45
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Reference 3: http://www.xbrl.org/2003/role/exampleRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 852
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-Section 55
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-SubTopic 20
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-Paragraph 1
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X

- 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

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