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Revenue - Disaggregation of Revenue (Details) - USD ($) $ in Millions | 3 Months Ended | 9 Months Ended
--- | --- | ---
Sep. 30, 2025 | Sep. 30, 2024 | Sep. 30, 2025 | Sep. 30, 2024
Disaggregation of Revenue [Line Items] |  |  |  |
Revenue from contracts with customers | $ 2,177 | $ 1,973 | $ 6,406 | $ 5,920
Lease Revenue | 91 | 131 | 232 | 386
Total | 2,268 | 2,104 | 6,638 | 6,306
Water Infrastructure | United States |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Revenue from contracts with customers | 256 | 209 | 704 | 638
Water Infrastructure | Western Europe |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Revenue from contracts with customers | 223 | 218 | 673 | 654
Water Infrastructure | Emerging Markets |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Revenue from contracts with customers | 118 | 136 | 353 | 372
Water Infrastructure | Other |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Revenue from contracts with customers | 59 | 59 | 157 | 163
Water Infrastructure | Transport |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Revenue from contracts with customers | 377 | 349 | 1,107 | 1,057
Water Infrastructure | Treatment |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Revenue from contracts with customers | 279 | 273 | 780 | 770
Applied Water | United States |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Revenue from contracts with customers | 250 | 237 | 755 | 708
Applied Water | Western Europe |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Revenue from contracts with customers | 102 | 96 | 307 | 297
Applied Water | Emerging Markets |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Revenue from contracts with customers | 68 | 81 | 210 | 238
Applied Water | Other |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Revenue from contracts with customers | 36 | 33 | 102 | 96
Applied Water | Building Solutions |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Revenue from contracts with customers | 260 | 248 | 777 | 743
Applied Water | Industrial Water |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Revenue from contracts with customers | 196 | 199 | 597 | 596
Measurement and Control Solutions | United States |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Revenue from contracts with customers | 340 | 322 | 1,022 | 956
Measurement and Control Solutions | Western Europe |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Revenue from contracts with customers | 93 | 61 | 259 | 220
Measurement and Control Solutions | Emerging Markets |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Revenue from contracts with customers | 46 | 47 | 143 | 138
Measurement and Control Solutions | Other |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Revenue from contracts with customers | 43 | 28 | 128 | 88
Measurement and Control Solutions | Smart Metering and Other |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Revenue from contracts with customers | 428 | 372 | 1,281 | 1,142
Measurement and Control Solutions | Analytics |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Revenue from contracts with customers | 94 | 86 | 271 | 260
Water Solutions and Services | United States |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Revenue from contracts with customers | 403 | 342 | 1,185 | 1,035
Water Solutions and Services | Western Europe |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Revenue from contracts with customers | 23 | 24 | 73 | 71
Water Solutions and Services | Emerging Markets |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Revenue from contracts with customers | 69 | 42 | 175 | 125
Water Solutions and Services | Other |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Revenue from contracts with customers | 48 | 38 | 160 | 121
Water Solutions and Services | Capital and Other |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Revenue from contracts with customers | 288 | 198 | 841 | 621
Water Solutions and Services | Services |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Revenue from contracts with customers | $ 255 | $ 248 | $ 752 | $ 731

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