EATON SHAREHOLDERS' EQUITY - Narrative (Details)		2 Months Ended	12 Months Ended
	Feb. 23, 2022 USD ($) $ / shares	Feb. 23, 2022 USD ($)	Dec. 31, 2021 USD ($) employee $ / shares shares	Dec. 31, 2020 USD ($) $ / shares shares	Dec. 31, 2019 $ / shares shares	Dec. 31, 2021 € / shares	Dec. 31, 2021 USD ($) holder $ / shares shares	Dec. 31, 2020 € / shares	Dec. 31, 2020 USD ($) $ / shares shares	Feb. 27, 2019 USD ($)
Shareholders Equity Textuals Abstract
Ordinary shares authorized (shares)							750,000,000
Ordinary share par value (USD per share) | $ / shares							$ 0.01
Ordinary shares outstanding (shares)							398,800,000		398,100,000
Ordinary shares issued (shares)							398,800,000		398,100,000
Deferred ordinary shares authorized (shares)							40,000		40,000
Deferred ordinary shares par value (USD per share) | € / shares						€ 1.00		€ 1.00
Deferred ordinary shares, shares issued and outstanding (shares)							40,000		40,000
Number of holders of record of Eaton ordinary shares | holder							10,447
Number of current and former employees who were shareholders through various Eaton plans | employee			14,835
Disclosure of Repurchase Agreements [Abstract]
Share repurchase program, authorized amount | $										$ 5,000,000,000
Ordinary shares purchased (shares)			900,000	17,100,000
Stock repurchased (shares) | $			$ 122,000,000	$ 1,608,000,000
Employee Trust [Abstract]
Deferred compensation plan trust of shares and marketable secutities | $							$ 4,000,000		$ 3,000,000
Dividends [Abstract]
Quarterly dividends declared per share (USD per share) | $ / shares			$ 3.04	$ 2.92	$ 2.84
Antidilutive securities excluded from computation of net income per ordinary share (shares)				600,000	800,000
Preferred A Stock
Shareholders Equity Textuals Abstract
Preferred stock issued (shares)							10,000		10,000
Preferred stock authorized (shares)							10,000		10,000
Preferred stock outstanding (shares)							10,000		10,000
Preferred stock, par value (USD per share) | $ / shares							$ 1.00		$ 1.00
Serial Preferred
Shareholders Equity Textuals Abstract
Preferred stock authorized (shares)							10,000,000		10,000,000
Preferred stock outstanding (shares)							0		0
Preferred stock, par value (USD per share) | $ / shares							$ 0.01		$ 0.01
Subsequent Event
Disclosure of Repurchase Agreements [Abstract]
Share repurchase program, authorized amount | $	$ 5,000,000,000	$ 5,000,000,000
Dividends [Abstract]
Quarterly dividends declared per share (USD per share) | $ / shares	$ 0.81
Dividend increase percentage over dividend paid in prior quarter (as a percent)		7.00%