Segment and Geographic Data (Summary of Operating Results by Segment) (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2025	Jun. 30, 2024	Jun. 30, 2025	Jun. 30, 2024
Financial information for each reportable segment
Capital Expenditures:			$ 169	$ 147
Operating Segments
Financial information for each reportable segment
Depreciation and Amortization:	$ 145	$ 145	290	279
Capital Expenditures:	98	73	169	147
Water Infrastructure \| Operating Segments
Financial information for each reportable segment
Depreciation and Amortization:	24	37	47	68
Capital Expenditures:	11	9	22	17
Applied Water \| Operating Segments
Financial information for each reportable segment
Depreciation and Amortization:	9	7	17	14
Capital Expenditures:	5	3	14	8
Measurement and Control Solutions \| Operating Segments
Financial information for each reportable segment
Depreciation and Amortization:	44	32	83	65
Capital Expenditures:	20	19	36	37
Water Solutions and Services \| Operating Segments
Financial information for each reportable segment
Depreciation and Amortization:	71	66	139	126
Capital Expenditures:	43	33	63	66
Regional Selling Locations \| Operating Segments
Financial information for each reportable segment
Capital Expenditures:	10	5	17	11
Corporate and other \| Operating Segments
Financial information for each reportable segment
Depreciation and Amortization:	(3)	3	4	6
Capital Expenditures:	$ 9	$ 4	$ 17	$ 8