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EATON SHAREHOLDERS' EQUITY - Reclassifications Out of Accumulated Other Comprehensive Loss (Details) - USD ($)
$ in Millions
 3 Months Ended
Mar. 31, 2024
Mar. 31, 2023
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]    
Income before income taxes $ 1,001 $ 762
Income tax expense (benefit) 179 123
Total, net of tax 821 $ 638
Reclassification out of Accumulated Other Comprehensive Loss    
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]    
Total, net of tax 1  
Gains and (losses) on net investment hedges (amount excluded from effectiveness testing) | Reclassification out of Accumulated Other Comprehensive Loss    
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]    
Income before income taxes 4  
Income tax expense (benefit) 0  
Total, net of tax 4  
Amortization of defined benefits pensions and other postretirement benefits items | Reclassification out of Accumulated Other Comprehensive Loss    
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]    
Income before income taxes (12)  
Income tax expense (benefit) 0  
Total, net of tax (11)  
Gains and (losses) on cash flow hedges | Reclassification out of Accumulated Other Comprehensive Loss    
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]    
Income tax expense (benefit) 2  
Total, net of tax 9  
Gains and (losses) on cash flow hedges | Reclassification out of Accumulated Other Comprehensive Loss | Floating-to-fixed interest rate swaps    
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]    
Income before income taxes 3  
Gains and (losses) on cash flow hedges | Reclassification out of Accumulated Other Comprehensive Loss | Currency exchange contracts    
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]    
Income before income taxes 8  
Gains and (losses) on cash flow hedges | Reclassification out of Accumulated Other Comprehensive Loss | Commodity contracts    
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]    
Income before income taxes $ (1)