CONSOLIDATED STATEMENTS OF INCOME - USD ($) shares in Millions, $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2023	Sep. 30, 2022	Sep. 30, 2023	Sep. 30, 2022
Net sales	$ 3,958.1	$ 3,669.3	$ 11,381.8	$ 10,516.6
Cost of sales (including special charges (a))	2,330.5	2,291.6	6,870.5	6,576.1
Selling, general and administrative expenses	1,024.9	876.9	3,026.8	2,731.7
Special (gains) and charges	36.7	17.8	82.2	45.5
Operating income	566.0	483.0	1,402.3	1,163.3
Other (income) expense (b)	(14.5)	5.7	(42.0)	(32.6)
Interest expense, net	74.3	65.1	226.3	174.1
Income before income taxes	506.2	412.2	1,218.0	1,021.8
Provision for income taxes	96.8	60.2	235.8	182.4
Net income including noncontrolling interest	409.4	352.0	982.2	839.4
Net income attributable to noncontrolling interest	5.4	4.9	15.1	12.1
Net income attributable to Ecolab	$ 404.0	$ 347.1	$ 967.1	$ 827.3
Earnings attributable to Ecolab per common share
Basic (in dollars per share)	$ 1.42	$ 1.22	$ 3.39	$ 2.90
Diluted (in dollars per share)	$ 1.41	$ 1.21	$ 3.38	$ 2.88
Weighted-average common shares outstanding
Basic (in shares)	285.1	284.9	284.9	285.4
Diluted (in shares)	286.9	286.3	286.4	287.0
Product and equipment sales
Net sales	$ 3,170.9	$ 2,963.0	$ 9,152.0	$ 8,473.9
Cost of sales (including special charges (a))	1,868.1	1,877.1	5,561.7	5,371.7
Service and lease sales
Net sales	787.2	706.3	2,229.8	2,042.7
Cost of sales (including special charges (a))	$ 462.4	$ 414.5	$ 1,308.8	$ 1,204.4