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Revenue Recognition (Tables) | 12 Months Ended
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Dec. 31, 2025
Revenue from Contract with Customer [Abstract] |
Schedule of Net Sales Disaggregated by Segment and Major Product Line | The following table disaggregates the Company’s net sales by segment. As described above, the Company’s North America segment sales are further disaggregated by major product line. In addition, the Company’s Rest of World segment sales are disaggregated by China and all other Rest of World.
Years ended December 31 (dollars in millions) | 2025 |  | 2024 |  | 2023
North America |  |  |  |  |
Water heaters and related parts | $ | 2,460.1 |  |  | $ | 2,441.7 |  |  | $ | 2,456.9 |
Boilers and related parts | 281.0 |  |  | 260.0 |  |  | 240.1 |
Water treatment products | 243.1 |  |  | 248.4 |  |  | 225.9 |
Total North America | 2,984.2 |  |  | 2,950.1 |  |  | 2,922.9 |
Rest of World |  |  |  |  |
China | $ | 689.5 |  |  | $ | 791.9 |  |  | $ | 835.1 |
All other Rest of World(1) | 190.9 |  |  | 126.7 |  |  | 121.8 |
Total Rest of World | 880.4 |  |  | 918.6 |  |  | 956.9 |
Inter-segment sales | (34.4) |  |  | (50.6) |  |  | (27.0) |
Total Net Sales | $ | 3,830.2 |  |  | $ | 3,818.1 |  |  | $ | 3,852.8 |
(1)Includes the results of Pureit from the fourth quarter 2024, the period of acquisition.

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