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Restructuring Charges (Accrual Rollfoward) (Details) - USD ($) $ in Millions | 3 Months Ended | 6 Months Ended
--- | --- | ---
Jun. 30, 2021 | Jun. 30, 2020 | Jun. 30, 2021 | Jun. 30, 2020
Restructuring Reserve [Roll Forward] |  |  |  |  |
Restructuring accruals - January 1 |  |  |  | $ 29 | $ 27
Restructuring charges |  | $ 3 | $ 38 | 8 | 40
Cash payments |  |  |  | (18) | (12)
Asset impairment |  |  |  | (1) | (17)
Foreign currency and other |  |  |  | 0 | (1)
Restructuring accruals - June 30 |  | 18 | 37 | 18 | 37
Water Infrastructure |  |  |  |  |
Restructuring Reserve [Roll Forward] |  |  |  |  |
Restructuring charges |  | 3 | 6 | 7 | 8
Restructuring accruals - June 30 |  | 3 | 4 | 3 | 4
Applied Water |  |  |  |  |
Restructuring Reserve [Roll Forward] |  |  |  |  |
Restructuring charges |  | 0 | 2 | 1 | 2
Restructuring accruals - June 30 |  | 1 | 1 | 1 | 1
Measurement & Control Solutions |  |  |  |  |
Restructuring Reserve [Roll Forward] |  |  |  |  |
Restructuring charges |  | 0 | 40 | 1 | 40
Restructuring accruals - June 30 |  | 11 | 27 | 11 | 27
Regional Selling Locations |  |  |  |  |
Restructuring Reserve [Roll Forward] |  |  |  |  |
Restructuring accruals - June 30 | [1] | 3 | 4 | 3 | 4
Corporate and Other |  |  |  |  |
Restructuring Reserve [Roll Forward] |  |  |  |  |
Restructuring accruals - June 30 |  | $ 0 | $ 1 | $ 0 | $ 1
[1] | Regional selling locations consist primarily of selling and marketing organizations and related support services that incurred restructuring expense which was allocated to the segments. The liabilities associated with restructuring expense were not allocated to the segments.

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- Definition Carrying amount (including both current and noncurrent portions of the accrual) as of the balance sheet date pertaining to a specified type of cost associated with exit from or disposal of business activities or restructuring pursuant to a duly authorized plan. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 420 -SubTopic 10 -Section 50 -Paragraph 1 -Subparagraph (b)(2) -URI http://asc.fasb.org/extlink&oid=6394359&loc=d3e17939-110869 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 420 -SubTopic 10 -Section S99 -Paragraph 2 -Subparagraph (SAB TOPIC 5.P.4(b)) -URI http://asc.fasb.org/extlink&oid=115931487&loc=d3e140904-122747 + Details
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