EQUITY - Reclassifications Out of Accumulated Other Comprehensive Loss (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2023	Mar. 31, 2022
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Income before income taxes	$ 762	$ 619
Income tax benefit (expense)	(123)	(86)
Net income attributable to Eaton ordinary shareholders	638	$ 532
Reclassification out of Accumulated Other Comprehensive Income
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Net income attributable to Eaton ordinary shareholders	4
Gains and (losses) on net investment hedges (amount excluded from effectiveness testing) | Reclassification out of Accumulated Other Comprehensive Income
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Income before income taxes	1
Income tax benefit (expense)	0
Net income attributable to Eaton ordinary shareholders	1
Pensions and other postretirement benefits | Reclassification out of Accumulated Other Comprehensive Income
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Income before income taxes	(8)
Income tax benefit (expense)	0
Net income attributable to Eaton ordinary shareholders	(8)
Gains and (losses) on cash flow hedges | Reclassification out of Accumulated Other Comprehensive Income
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Income tax benefit (expense)	(3)
Net income attributable to Eaton ordinary shareholders	11
Gains and (losses) on cash flow hedges | Reclassification out of Accumulated Other Comprehensive Income | Fixed-to-floating 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 Income | Currency exchange contracts
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Income before income taxes	$ 11