EQUITY - Calculation of Net Income per Ordinary Share (Details) - USD ($) $ / shares in Units, shares in Millions, $ in Millions	3 Months Ended
	Mar. 31, 2022	Mar. 31, 2021
Calculation of net income per ordinary share attributable to ordinary shareholders
Net Income Attributable to Eaton ordinary shareholders	$ 532	$ 458
Weighted-average number of ordinary shares outstanding - diluted (shares)	401.8	400.9
Less dilutive effect of equity-based compensation (shares)	2.6	2.6
Weighted-average number of ordinary shares outstanding - basic (shares)	399.2	398.3
Net income per share attributable to Eaton ordinary shareholders
Diluted (USD per share)	$ 1.33	$ 1.14
Basic (USD per share)	$ 1.33	$ 1.15