CONSOLIDATED STATEMENTS OF INCOME - USD ($) shares in Millions, $ in Millions	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Income Statement [Abstract]
Net sales	$ 19,628	$ 17,858	$ 21,390
Cost of products sold	13,293	12,408	14,338
Selling and administrative expense	3,256	3,075	3,583
Research and development expense	616	551	606
Interest expense - net	144	149	199
Gain on sale of businesses	617	221	0
Other expense - net	40	150	73
Income before income taxes	2,896	1,746	2,591
Income tax expense	750	331	378
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
Net income per share attributable to Eaton ordinary shareholders
Diluted (USD per share)	$ 5.34	$ 3.49	$ 5.25
Basic (USD per share)	$ 5.38	$ 3.51	$ 5.28
Weighted-average number of ordinary shares outstanding
Diluted (shares)	401.6	404.0	420.8
Basic (shares)	398.7	402.2	419.0
Cash dividends declared per ordinary share (USD per share)	$ 3.04	$ 2.92	$ 2.84