COMMITMENTS AND CONTINGENCIES (Details)	6 Months Ended
Jun. 30, 2022 location item
Environmental matters
Number of locations for environmental assessments and remediation \| location	30
Nalco Holding Company ("Nalco")
Environmental matters
Number of plaintiffs having claims \| item	5,000

Represents the number of locations for environmental assessments and remediation.

No definition available.

Name:	ecl_NumberOfLocationsForEnvironmentalAssessmentsAndRemediation
Namespace Prefix:	ecl_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	duration