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EARNINGS ATTRIBUTABLE TO ECOLAB PER COMMON SHARE ("EPS") (Tables)
 6 Months Ended
Jun. 30, 2026
EARNINGS ATTRIBUTABLE TO ECOLAB PER COMMON SHARE ("EPS") [Abstract]  
Schedule of computations of the basic and diluted EPS
The computations of the basic and diluted EPS amounts were as follows:
Second Quarter EndedSix Months Ended
June 30June 30
(millions, except per share)2026202520262025
Net income attributable to Ecolab$534.9 $524.2 $967.5 $926.7 
Weighted-average common shares outstanding
Basic280.7 283.5 281.3 283.4 
Effect of dilutive stock options and units1.5 1.9 1.6 2.0 
Diluted282.2 285.4 282.9 285.4 
Earnings attributable to Ecolab per common share
Basic EPS$1.91 $1.85 $3.44 $3.27 
Diluted EPS$1.90 $1.84 $3.42 $3.25 
Anti-dilutive securities excluded from the computation of diluted EPS1.1 0.6 0.6 0.6 
Amounts do not necessarily sum due to rounding.