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SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (Revenue) (Details) - USD ($) $ in Thousands | 12 Months Ended
--- | ---
Dec. 31, 2025 | Dec. 31, 2024 | Dec. 31, 2023
Segment Reporting, Revenue Reconciling Item [Line Items] |  |  |
Revenue from Contract with Customer, Excluding Assessed Tax | $ 2,131,250 | $ 2,021,341 | $ 2,065,133
Operating Segments |  |  |
Segment Reporting, Revenue Reconciling Item [Line Items] |  |  |
Revenue from Contract with Customer, Excluding Assessed Tax | 2,256,100 | 2,143,200 | 2,173,500
Operating Segments | Water Systems |  |  |
Segment Reporting, Revenue Reconciling Item [Line Items] |  |  |
Revenue from Contract with Customer, Excluding Assessed Tax | 1,256,400 | 1,184,000 | 1,203,700
Operating Segments | Water Systems | United States & Canada |  |  |
Segment Reporting, Revenue Reconciling Item [Line Items] |  |  |
Revenue from Contract with Customer, Excluding Assessed Tax | 607,900 | 586,600 | 636,000
Operating Segments | Water Systems | Latin America |  |  |
Segment Reporting, Revenue Reconciling Item [Line Items] |  |  |
Revenue from Contract with Customer, Excluding Assessed Tax | 204,700 | 170,900 | 174,200
Operating Segments | Water Systems | EMEA |  |  |
Segment Reporting, Revenue Reconciling Item [Line Items] |  |  |
Revenue from Contract with Customer, Excluding Assessed Tax | 218,100 | 211,400 | 198,300
Operating Segments | Water Systems | Asia Pacific |  |  |
Segment Reporting, Revenue Reconciling Item [Line Items] |  |  |
Revenue from Contract with Customer, Excluding Assessed Tax | 100,900 | 93,200 | 86,800
Operating Segments | Distribution |  |  |
Segment Reporting, Revenue Reconciling Item [Line Items] |  |  |
Revenue from Contract with Customer, Excluding Assessed Tax | 700,700 | 685,500 | 673,300
Operating Segments | Distribution | United States & Canada |  |  |
Segment Reporting, Revenue Reconciling Item [Line Items] |  |  |
Revenue from Contract with Customer, Excluding Assessed Tax | 700,700 | 685,500 | 673,300
Operating Segments | Energy Systems |  |  |
Segment Reporting, Revenue Reconciling Item [Line Items] |  |  |
Revenue from Contract with Customer, Excluding Assessed Tax | 299,000 | 273,700 | 296,500
Operating Segments | Energy Systems | United States & Canada |  |  |
Segment Reporting, Revenue Reconciling Item [Line Items] |  |  |
Revenue from Contract with Customer, Excluding Assessed Tax | 229,000 | 212,400 | 220,900
Operating Segments | Energy Systems | Other |  |  |
Segment Reporting, Revenue Reconciling Item [Line Items] |  |  |
Revenue from Contract with Customer, Excluding Assessed Tax | 70,000 | 61,300 | 75,600
Intersegment Sales |  |  |
Segment Reporting, Revenue Reconciling Item [Line Items] |  |  |
Revenue from Contract with Customer, Excluding Assessed Tax | 124,800 | 121,900 | 108,400
Intersegment Sales | Water Systems |  |  |
Segment Reporting, Revenue Reconciling Item [Line Items] |  |  |
Revenue from Contract with Customer, Excluding Assessed Tax | 124,800 | 121,900 | 108,400
Intersegment Sales | Water Systems | United States & Canada |  |  |
Segment Reporting, Revenue Reconciling Item [Line Items] |  |  |
Revenue from Contract with Customer, Excluding Assessed Tax | 124,800 | 121,900 | 108,400
Intersegment Sales | Distribution |  |  |
Segment Reporting, Revenue Reconciling Item [Line Items] |  |  |
Revenue from Contract with Customer, Excluding Assessed Tax | 0 | 0 | 0
Intersegment Sales | Energy Systems |  |  |
Segment Reporting, Revenue Reconciling Item [Line Items] |  |  |
Revenue from Contract with Customer, Excluding Assessed Tax | 0 | 0 | 0
Intersegment Eliminations/Other |  |  |
Segment Reporting, Revenue Reconciling Item [Line Items] |  |  |
Revenue from Contract with Customer, Excluding Assessed Tax | $ (124,800) | $ (121,900) | $ (108,400)

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