CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Statement of Comprehensive Income [Abstract]
Net income	$ 2,146	$ 1,415	$ 2,213
Less net income for noncontrolling interests	(2)	(5)	(2)
Net income attributable to Eaton ordinary shareholders	2,144	1,410	2,211
Other comprehensive income (loss), net of tax
Currency translation and related hedging instruments	30	201	16
Pensions and other postretirement benefits	495	(73)	(130)
Cash flow hedges	37	(33)	(31)
Other comprehensive income (loss) attributable to Eaton ordinary shareholders	562	95	(145)
Total comprehensive income attributable to Eaton ordinary shareholders	$ 2,706	$ 1,505	$ 2,066