Amount of net assets derecognized as a result of closing of sale of the business.

No definition available.

Name:	ecl_DisposalGroupIncludingDiscontinuedOperationDerecognitionOfNetAssets
Namespace Prefix:	ecl_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

The amount of gain on sale of business for the period per each share of common stock or unit outstanding during the reporting period.

+ References

No definition available.

+ Details

Name:	ecl_GainOnSaleOfBusinessPerDilutedShare
Namespace Prefix:	ecl_
Data Type:	dtr-types:perShareItemType
Balance Type:	na
Period Type:	duration

- Definition

Amount of transaction costs and other adjustments related to sale of disposal group.

+ References

No definition available.

+ Details

Name:	ecl_SaleOfDisposalGroupTransactionCosts
Namespace Prefix:	ecl_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Definition

Amount of post-tax gain (loss) on sale of business that was recorded in special gains and charges in the statement of operations.

+ References

No definition available.

+ Details

Name:	ecl_SpecialGainsAndChargesGainLossOnSaleOfBusinessAfterTax
Namespace Prefix:	ecl_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

- Definition

Amount of pre-tax gain (loss) on sale of business that was recorded in special gains and charges in the statement of operations.

+ References

No definition available.

+ Details

Name:	ecl_SpecialGainsAndChargesGainLossOnSaleOfBusinessBeforeTax
Namespace Prefix:	ecl_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

- Definition

Amount of consideration received or receivable for the disposal of assets and liabilities, including discontinued operation.

+ References

No definition available.

+ Details

Name:	us-gaap_DisposalGroupIncludingDiscontinuedOperationConsideration
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

+ References

No definition available.

+ Details

Name:	us-gaap_IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperationsLineItems
Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

- Definition

The cash inflow associated with the amount received from the sale of a portion of the company's business, for example a segment, division, branch or other business, during the period.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Name Accounting Standards Codification
-Topic 230
-SubTopic 10
-Section 45
-Paragraph 12
-Subparagraph (b)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482740/230-10-45-12

+ Details

Name:	us-gaap_ProceedsFromDivestitureOfBusinesses
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Details

Name:	us-gaap_IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperationsAxis=ecl_GlobalSurgicalSolutionsBusinessMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_DisposalGroupClassificationAxis=us-gaap_DisposalGroupHeldforsaleNotDiscontinuedOperationsMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

ASSETS AND LIABILITIES HELD FOR SALE (Details) - Global surgical solutions business - Disposal group, held-for-sale, not discontinued operations - USD ($) $ / shares in Units, $ in Millions		3 Months Ended	9 Months Ended
	Aug. 01, 2024	Sep. 30, 2024	Sep. 30, 2024	Apr. 27, 2024
Dispositions
Sale consideration				$ 950.0
Cash received from sale of business	$ 926.0
Special gain (loss) on sale of business before tax		$ 365.3	$ 365.3
Special gain (loss) on sale of business after tax		$ 264.2	$ 264.2
Gain on sale of business per diluted share		$ 0.92
Transaction costs and other adjustments		$ 56.4
Derecognition of net assets	$ 504.6