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EATON SHAREHOLDERS' EQUITY - Changes in Accumulated Other Comprehensive (Loss) Income (Details) - USD ($)
$ in Millions
 3 Months Ended
Mar. 31, 2024
Mar. 31, 2023
AOCI Attributable to Parent, Net of Tax [Roll Forward]    
Balance at beginning of period $ 19,069 $ 17,075
Other comprehensive income (loss) before reclassifications (39)  
Amounts reclassified from Accumulated other comprehensive loss (income) (1)  
Other comprehensive income (loss) attributable to Eaton ordinary shareholders (40) 132
Balance at end of period 19,326 $ 17,485
Total    
AOCI Attributable to Parent, Net of Tax [Roll Forward]    
Balance at beginning of period (3,906)  
Balance at end of period (3,946)  
Currency translation and related hedging instruments    
AOCI Attributable to Parent, Net of Tax [Roll Forward]    
Balance at beginning of period (3,029)  
Other comprehensive income (loss) before reclassifications (49)  
Amounts reclassified from Accumulated other comprehensive loss (income) (4)  
Other comprehensive income (loss) attributable to Eaton ordinary shareholders (53)  
Balance at end of period (3,082)  
Pensions and other postretirement benefits    
AOCI Attributable to Parent, Net of Tax [Roll Forward]    
Balance at beginning of period (995)  
Other comprehensive income (loss) before reclassifications 6  
Amounts reclassified from Accumulated other comprehensive loss (income) 11  
Other comprehensive income (loss) attributable to Eaton ordinary shareholders 17  
Balance at end of period (978)  
Cash flow hedges    
AOCI Attributable to Parent, Net of Tax [Roll Forward]    
Balance at beginning of period 118  
Other comprehensive income (loss) before reclassifications 4  
Amounts reclassified from Accumulated other comprehensive loss (income) (9)  
Other comprehensive income (loss) attributable to Eaton ordinary shareholders (4)  
Balance at end of period $ 114