CONSOLIDATED STATEMENTS OF EQUITY - USD ($) shares in Millions, $ in Millions	TOTAL ECOLAB SHAREHOLDERS' EQUITY	COMMON STOCK	ADDITIONAL PAID-IN CAPITAL	RETAINED EARNINGS	ACCUMULATED OTHER COMPREHENSIVE INCOME (LOSS)	TREASURY STOCK	NON-CONTROLLING INTEREST	Total
Balance at Dec. 31, 2021	$ 7,224.2	$ 364.1	$ 6,464.6	$ 8,814.5	$ (1,634.8)	$ (6,784.2)	$ 28.9	$ 7,253.1
Increase (Decrease) in Stockholders' Equity
Net income	171.9			171.9			2.8	174.7
Other comprehensive income (loss)	71.2				71.2		(1.0)	70.2
Cash dividends declared (a)	(146.0)			(146.0)			(7.8)	(153.8)
Fair value adjustment of prior acquisition							0.6	0.6
Stock options and awards	37.4	0.4	36.9			0.1		37.4
Reacquired shares	(277.1)					(277.1)		(277.1)
Balance at Mar. 31, 2022	7,081.6	364.5	6,501.5	8,840.4	(1,563.6)	(7,061.2)	23.5	7,105.1
Balance at Dec. 31, 2022	7,236.1	364.7	6,580.2	9,318.8	(1,726.6)	(7,301.0)	22.5	$ 7,258.6
Balance (in shares) at Dec. 31, 2022								284.5
Increase (Decrease) in Stockholders' Equity
Net income	233.4			233.4			4.7	$ 238.1
Other comprehensive income (loss)	(10.6)				(10.6)		0.5	(10.1)
Cash dividends declared (a)	(150.9)			(150.9)			(6.9)	(157.8)
Stock options and awards	46.8	0.3	46.3			0.2		46.8
Reacquired shares	(10.6)					(10.6)		(10.6)
Balance at Mar. 31, 2023	$ 7,344.2	$ 365.0	$ 6,626.5	$ 9,401.3	$ (1,737.2)	$ (7,311.4)	$ 20.8	$ 7,365.0
Balance (in shares) at Mar. 31, 2023								284.7