CONSOLIDATED STATEMENTS OF INCOME - USD ($) shares in Millions, $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2024	Jun. 30, 2023	Jun. 30, 2024	Jun. 30, 2023
Net sales	$ 3,985.8	$ 3,852.1	$ 7,737.7	$ 7,423.7
Cost of sales (including special charges (a))	2,241.0	2,334.8	4,369.1	4,540.0
Selling, general and administrative expenses	1,075.7	1,011.6	2,153.4	2,001.9
Special (gains) and charges	12.2	21.0	40.4	45.5
Operating income	656.9	484.7	1,174.8	836.3
Other (income) expense	(12.6)	(14.4)	(25.2)	(27.5)
Interest expense, net	78.8	77.8	150.4	152.0
Income before income taxes	590.7	421.3	1,049.6	711.8
Provision for income taxes	95.7	86.6	138.0	139.0
Net income including noncontrolling interest	495.0	334.7	911.6	572.8
Net income attributable to noncontrolling interest	4.1	5.0	8.6	9.7
Net income attributable to Ecolab	$ 490.9	$ 329.7	$ 903.0	$ 563.1
Earnings attributable to Ecolab per common share
Basic (in dollars per share)	$ 1.72	$ 1.16	$ 3.17	$ 1.98
Diluted (in dollars per share)	$ 1.71	$ 1.15	$ 3.14	$ 1.97
Weighted-average common shares outstanding
Basic (in shares)	284.6	284.9	285.2	284.8
Diluted (in shares)	287.0	286.3	287.4	286.1
Product and equipment sales
Net sales	$ 3,173.1	$ 3,104.8	$ 6,159.6	$ 5,981.1
Cost of sales (including special charges (a))	1,770.6	1,895.3	3,449.8	3,693.6
Service and lease sales
Net sales	812.7	747.3	1,578.1	1,442.6
Cost of sales (including special charges (a))	$ 470.4	$ 439.5	$ 919.3	$ 846.4