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EATON SHAREHOLDERS' EQUITY - Net Income per Ordinary Share Attributable to Shareholders (Details) - USD ($)
$ / shares in Units, shares in Millions, $ in Millions
 3 Months Ended 6 Months Ended
Jun. 30, 2026
Jun. 30, 2025
Jun. 30, 2026
Jun. 30, 2025
Calculation of net income per ordinary share attributable to ordinary shareholders        
Net income attributable to Eaton ordinary shareholders $ 821 $ 982 $ 1,687 $ 1,945
Weighted-average number of ordinary shares outstanding - diluted (in shares) 389.5 391.4 389.4 392.5
Less: dilutive effect of equity-based compensation (in shares) 1.0 1.1 1.0 1.3
Weighted-average number of ordinary shares outstanding - basic (in shares) 388.5 390.3 388.4 391.2
Net income per share attributable to Eaton ordinary shareholders        
Diluted (USD per share) $ 2.11 $ 2.51 $ 4.33 $ 4.96
Basic (USD per share) $ 2.11 $ 2.52 $ 4.34 $ 4.97