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Restructuring Charges (Estimated Restructuring Costs) (Details) - USD ($) $ in Millions | 3 Months Ended | 12 Months Ended
--- | --- | ---
Mar. 31, 2020 | Dec. 31, 2019 | Dec. 31, 2018 | Dec. 31, 2017
2020 Plan |  |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |  |
Total expected costs | $ 1 |  |  |
Restructuring costs incurred during period | 1 |  |  |
Total expected costs remaining | 0 |  |  |
2019 Plan |  |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |  |
Total expected costs | 52 |  |  |
Restructuring costs incurred during period | 1 | $ 50 |  |
Total expected costs remaining | 1 |  |  |
2017 Plan |  |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |  |
Total expected costs | 23 |  |  |
Restructuring costs incurred during period | 0 | 2 | $ 4 | $ 11
Total expected costs remaining | 6 |  |  |
Operating Segments | Water Infrastructure | 2020 Plan |  |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |  |
Total expected costs | 1 |  |  |
Restructuring costs incurred during period | 1 |  |  |
Total expected costs remaining | 0 |  |  |
Operating Segments | Water Infrastructure | 2019 Plan |  |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |  |
Total expected costs | 20 |  |  |
Restructuring costs incurred during period | 1 | 18 |  |
Total expected costs remaining | 1 |  |  |
Operating Segments | Water Infrastructure | 2017 Plan |  |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |  |
Total expected costs | 12 |  |  |
Restructuring costs incurred during period | 0 | 1 | 2 | 5
Total expected costs remaining | 4 |  |  |
Operating Segments | Applied Water | 2020 Plan |  |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |  |
Total expected costs | 0 |  |  |
Restructuring costs incurred during period | 0 |  |  |
Total expected costs remaining | 0 |  |  |
Operating Segments | Applied Water | 2019 Plan |  |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |  |
Total expected costs | 5 |  |  |
Restructuring costs incurred during period | 0 | 5 |  |
Total expected costs remaining | 0 |  |  |
Operating Segments | Applied Water | 2017 Plan |  |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |  |
Total expected costs | 7 |  |  |
Restructuring costs incurred during period | 0 | 0 | 1 | 4
Total expected costs remaining | 2 |  |  |
Operating Segments | Measurement & Control Solutions | 2020 Plan |  |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |  |
Total expected costs | 0 |  |  |
Restructuring costs incurred during period | 0 |  |  |
Total expected costs remaining | 0 |  |  |
Operating Segments | Measurement & Control Solutions | 2019 Plan |  |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |  |
Total expected costs | 27 |  |  |
Restructuring costs incurred during period | 0 | 27 |  |
Total expected costs remaining | 0 |  |  |
Operating Segments | Measurement & Control Solutions | 2017 Plan |  |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |  |
Total expected costs | 4 |  |  |
Restructuring costs incurred during period | 0 | $ 1 | $ 1 | $ 2
Total expected costs remaining | $ 0 |  |  |

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- Definition Amount expected to be recognized in earnings for the specified restructuring cost. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 420 -SubTopic 10 -Section S99 -Paragraph 2 -Subparagraph (SAB Topic 5.P.4(b)(1)) -URI http://asc.fasb.org/extlink&oid=115931487&loc=d3e140904-122747 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 420 -SubTopic 10 -Section 50 -Paragraph 1 -Subparagraph (b)(1) -URI http://asc.fasb.org/extlink&oid=6394359&loc=d3e17939-110869 Reference 3: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 420 -SubTopic 10 -Section 50 -Paragraph 1 -Subparagraph (d) -URI http://asc.fasb.org/extlink&oid=6394359&loc=d3e17939-110869 Reference 4: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 420 -SubTopic 10 -Section S99 -Paragraph 2 -Subparagraph (SAB Topic 5.P.4(d)) -URI http://asc.fasb.org/extlink&oid=115931487&loc=d3e140904-122747 + Details
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- Definition Discloses the amount charged against the accrued restructuring reserves, or earnings if not previously accrued, during the period for the specified type of restructuring cost. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 420 -SubTopic 10 -Section 50 -Paragraph 1 -Subparagraph (b)(1) -URI http://asc.fasb.org/extlink&oid=6394359&loc=d3e17939-110869 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 420 -SubTopic 10 -Section S99 -Paragraph 2 -Subparagraph (SAB Topic 5.P.4(b)(1)) -URI http://asc.fasb.org/extlink&oid=115931487&loc=d3e140904-122747 Reference 3: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 420 -SubTopic 10 -Section 50 -Paragraph 1 -Subparagraph (d) -URI http://asc.fasb.org/extlink&oid=6394359&loc=d3e17939-110869 Reference 4: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 420 -SubTopic 10 -Section S99 -Paragraph 2 -Subparagraph (SAB Topic 5.P.4(d)) -URI http://asc.fasb.org/extlink&oid=115931487&loc=d3e140904-122747 + Details
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