v3.25.2
Equity - Summary of Shareholders' Equity (Details) - USD ($)
$ / shares in Units, $ in Millions
 3 Months Ended 6 Months Ended
Jun. 30, 2025
Mar. 31, 2025
Jun. 30, 2024
Mar. 31, 2024
Jun. 30, 2025
Jun. 30, 2024
Increase (Decrease) in Stockholders' Equity [Roll Forward]            
Beginning balance $ 10,822 $ 10,647 $ 10,203 $ 10,176 $ 10,647 $ 10,176
Net income attributable to Xylem 226 169 194 153 395 347
Other comprehensive income (loss), net 115 98 0 (76)    
Other activity 1   (1) (2)    
Dividends declared (98) (98) (87) (87)    
Distribution to minority shareholders (2)          
Net income attributable to non-controlling interests 2 1        
Stock incentive plan activity 15 5 39 39    
Ending balance $ 11,081 $ 10,822 $ 10,348 $ 10,203 11,081 10,348
Dividends declared (in dollars per share) $ 0.40 $ 0.40 $ 0.36 $ 0.36    
Common Stock            
Increase (Decrease) in Stockholders' Equity [Roll Forward]            
Beginning balance $ 3 $ 3 $ 3 $ 3 3 3
Ending balance 3 3 3 3 3 3
Capital in Excess of Par Value            
Increase (Decrease) in Stockholders' Equity [Roll Forward]            
Beginning balance 8,705 8,687 8,618 8,564 8,687 8,564
Stock incentive plan activity 15 18 42 54    
Ending balance 8,720 8,705 8,660 8,618 8,720 8,660
Retained Earnings            
Increase (Decrease) in Stockholders' Equity [Roll Forward]            
Beginning balance 3,211 3,140 2,667 2,601 3,140 2,601
Net income attributable to Xylem 226 169 194 153    
Dividends declared (98) (98) (87) (87)    
Ending balance 3,339 3,211 2,774 2,667 3,339 2,774
Accumulated Other Comprehensive Loss            
Increase (Decrease) in Stockholders' Equity [Roll Forward]            
Beginning balance (337) (435) (345) (269) (435) (269)
Other comprehensive income (loss), net 115 98 0 (76)    
Ending balance (222) (337) (345) (345) (222) (345)
Treasury Stock            
Increase (Decrease) in Stockholders' Equity [Roll Forward]            
Beginning balance (766) (753) (748) (733) (753) (733)
Stock incentive plan activity 0 (13) (3) (15)    
Ending balance (766) (766) (751) (748) (766) (751)
Non-Controlling Interest            
Increase (Decrease) in Stockholders' Equity [Roll Forward]            
Beginning balance 6 5 8 10 5 10
Other activity 1   (1) (2)    
Distribution to minority shareholders (2)          
Net income attributable to non-controlling interests 2 1        
Ending balance $ 7 $ 6 $ 7 $ 8 $ 7 $ 7