v3.25.2
Total 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 of period   $ 3,410.6     $ 3,410.6  
Net income $ 245.5   $ 219.1   410.0 $ 357.5
Other comprehensive (loss) income 32.3   $ (17.3)   51.8 (26.6)
End of period $ 3,498.8       3,498.8  
Cash dividends declared (USD per share) $ 1.32 $ 1.32 $ 1.22 $ 1.22    
Common Stock            
Increase (Decrease) in Stockholders' Equity [Roll Forward]            
Beginning of period $ 0.6 $ 0.6 $ 0.6 $ 0.6 0.6 0.6
End of period 0.6 0.6 0.6 0.6 0.6 0.6
Additional Paid-in Capital            
Increase (Decrease) in Stockholders' Equity [Roll Forward]            
Beginning of period 0.0 2.6 1.3 6.1 2.6 6.1
Stock-based compensation 6.3 14.4 6.1 12.8    
Acquisition/surrender of common shares (6.5) (15.5) (5.5) (17.6)    
Directors deferred compensation 0.2 (1.5) 0.2 0.0    
End of period 0.0 0.0 2.1 1.3 0.0 2.1
Retained Earnings            
Increase (Decrease) in Stockholders' Equity [Roll Forward]            
Beginning of period 3,749.2 3,779.5 3,366.2 3,309.4 3,779.5 3,309.4
Net income 244.2 163.2 217.5 137.1    
Acquisition/surrender of common shares (101.2) (122.7) (9.3) (14.6) (223.9) (23.9)
Cash dividends declared (70.4) (70.8) (65.6) (65.7)    
End of period 3,821.8 3,749.2 3,508.8 3,366.2 3,821.8 3,508.8
Accumulated Other Comprehensive Income (Loss)            
Increase (Decrease) in Stockholders' Equity [Roll Forward]            
Beginning of period (367.0) (386.5) (321.7) (312.4) (386.5) (312.4)
Other comprehensive (loss) income 32.3 19.5 (17.3) (9.3) 51.8  
End of period (334.7) (367.0) (339.0) (321.7) (334.7) (339.0)
Total Hubbell Shareholders' Equity            
Increase (Decrease) in Stockholders' Equity [Roll Forward]            
Beginning of period 3,382.8 3,396.2 3,046.4 3,003.7 3,396.2 3,003.7
Net income 244.2 163.2 217.5 137.1    
Other comprehensive (loss) income 32.3 19.5 (17.3) (9.3)    
Stock-based compensation 6.3 14.4 6.1 12.8    
Acquisition/surrender of common shares (107.7) (138.2) (14.8) (32.2)    
Cash dividends declared (70.4) (70.8) (65.6) (65.7)    
Directors deferred compensation 0.2 (1.5) 0.2 0.0    
End of period 3,487.7 3,382.8 3,172.5 3,046.4 3,487.7 3,172.5
Non- controlling interest            
Increase (Decrease) in Stockholders' Equity [Roll Forward]            
Beginning of period 10.8 14.4 12.7 12.3 14.4 12.3
Net income 1.3 1.3 1.6 1.3    
Dividends to noncontrolling interest (1.0) (4.9) (0.6) (0.9)    
End of period $ 11.1 $ 10.8 $ 13.7 $ 12.7 $ 11.1 $ 13.7