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Goodwill and Other Intangible Assets (Rollforward of Goodwill) (Details) - USD ($) $ in Millions | 3 Months Ended | 12 Months Ended
--- | --- | ---
Sep. 30, 2020 | Sep. 30, 2019 | Dec. 31, 2021 | Dec. 31, 2020 | Dec. 31, 2019
Changes in the carrying value of goodwill by operating segment |  |  |  |  |
Beginning Balance |  |  | $ 2,854 | $ 2,839 |
Goodwill, Impairment Loss | $ (58) | $ (148) | 0 | (58) | $ (148)
Foreign currency and other |  |  | (62) | 73 |
Ending Balance |  |  | 2,792 | 2,854 | 2,839
Water Infrastructure |  |  |  |  |
Changes in the carrying value of goodwill by operating segment |  |  |  |  |
Beginning Balance |  |  | 668 | 651 |
Goodwill, Impairment Loss |  |  |  | 0 |
Foreign currency and other |  |  | (12) | 17 |
Ending Balance |  |  | 656 | 668 | 651
Applied Water |  |  |  |  |
Changes in the carrying value of goodwill by operating segment |  |  |  |  |
Beginning Balance |  |  | 529 | 513 |
Goodwill, Impairment Loss |  |  |  | 0 |
Foreign currency and other |  |  | (14) | 16 |
Ending Balance |  |  | 515 | 529 | 513
Measurement & Control Solutions |  |  |  |  |
Changes in the carrying value of goodwill by operating segment |  |  |  |  |
Beginning Balance |  |  | 1,657 | 1,675 |
Goodwill, Impairment Loss |  |  |  | (58) |
Foreign currency and other |  |  | (36) | 40 |
Ending Balance |  |  | $ 1,621 | $ 1,657 | $ 1,675

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- 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 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 20 -Section 45 -Paragraph 5 -URI http://asc.fasb.org/extlink&oid=120320667&loc=SL49117168-202975 Reference 3: http://www.xbrl.org/2003/role/exampleRef -Publisher FASB -Name Accounting Standards Codification -Topic 852 -SubTopic 10 -Section 55 -Paragraph 10 -URI http://asc.fasb.org/extlink&oid=84165509&loc=d3e56426-112766 Reference 4: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 20 -Section 45 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=99380562&loc=d3e13770-109266 + Details
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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 Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (f) -URI http://asc.fasb.org/extlink&oid=121556970&loc=d3e13816-109267 + Details
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