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Restructuring Charges (Accrual Rollfoward) (Details) - USD ($)
$ in Millions
 3 Months Ended
Mar. 31, 2023
Mar. 31, 2022
Restructuring Reserve [Roll Forward]    
Restructuring accruals - January 1 $ 10 $ 7
Restructuring costs, net 6 0
Cash payments (6) (3)
Asset impairment 0 0
Restructuring accruals - March 31 10 4
Water Infrastructure    
Restructuring Reserve [Roll Forward]    
Restructuring costs, net 2 0
Restructuring accruals - March 31 1 0
Applied Water    
Restructuring Reserve [Roll Forward]    
Restructuring costs, net 1 0
Restructuring accruals - March 31 0 0
Measurement & Control Solutions    
Restructuring Reserve [Roll Forward]    
Restructuring costs, net 5 0
Restructuring accruals - March 31 4 3
Regional Selling Locations    
Restructuring Reserve [Roll Forward]    
Restructuring accruals - March 31 [1] 3 1
Corporate and Other    
Restructuring Reserve [Roll Forward]    
Restructuring accruals - March 31 $ 2 $ 0
[1] Regional selling locations consist primarily of selling and marketing organizations and related support services that incurred restructuring expense that was allocated to the segments. The liabilities associated with restructuring expense were not allocated to the segments.