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FAIR VALUE - Narrative (Details) $ in Thousands	12 Months Ended
	Dec. 31, 2025 USD ($)
FAIR VALUE
Transfers between fair value levels for assets and liabilities	$ 0

X

- Definition

Represents the amount transferred between all fair value levels for assets or liabilities.

+ References

No definition available.

+ Details

Name:	leco_FairValueTransfersBetweenLevelsAssetsOrLiabilities
Namespace Prefix:	leco_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

X

- References

No definition available.

+ Details

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