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Segment and Geographic Data (Summary of Operating Results by Segment) (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2025	Sep. 30, 2024	Sep. 30, 2025	Sep. 30, 2024
Financial information for each reportable segment
Capital Expenditures:			$ 248	$ 221
Operating Segments
Financial information for each reportable segment
Depreciation and Amortization:	$ 142	$ 141	432	420
Capital Expenditures:	79	74	248	221
Water Infrastructure | Operating Segments
Financial information for each reportable segment
Depreciation and Amortization:	24	25	71	93
Capital Expenditures:	7	7	29	24
Applied Water | Operating Segments
Financial information for each reportable segment
Depreciation and Amortization:	8	7	25	21
Capital Expenditures:	9	5	23	13
Measurement and Control Solutions | Operating Segments
Financial information for each reportable segment
Depreciation and Amortization:	43	33	126	98
Capital Expenditures:	20	14	56	51
Water Solutions and Services | Operating Segments
Financial information for each reportable segment
Depreciation and Amortization:	64	73	203	199
Capital Expenditures:	30	37	93	103
Regional Selling Locations | Operating Segments
Financial information for each reportable segment
Capital Expenditures:	6	5	23	16
Corporate and other | Operating Segments
Financial information for each reportable segment
Depreciation and Amortization:	3	3	7	9
Capital Expenditures:	$ 7	$ 6	$ 24	$ 14

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