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RECONCILIATION OF FINANCIAL STATEMENTS TO FORM 5500 (Details) - ECOLAB SAVINGS PLAN AND ESOP - USD ($)
$ in Thousands
12 Months Ended
Dec. 31, 2025
Dec. 31, 2024
Reconciliation of net assets available for benefits    
Net assets available for benefits per the financial statements $ 4,636,225 $ 4,186,559
Fully benefit-responsive investment contracts value adjustment (2,989) (6,647)
Net assets available for benefits per Form 5500 4,633,236 $ 4,179,912
Reconciliation of the net increase in net assets available for benefits per the Plan financial statements    
Net increase in net assets available for benefits per the financial statements 449,666  
Prior year fully benefit-responsive investment contracts value adjustment 6,647  
Current year fully benefit-responsive investment contracts value adjustment (2,989)  
Total increase in net assets available for benefits per Form 5500 $ 453,324