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RATIONALIZATION AND ASSET IMPAIRMENTS (Textual) (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Mar. 31, 2015	Mar. 31, 2014	Dec. 31, 2014
Rationalization and Asset Impairments
Rationalization and asset impairment charges (gains)	$ 0us-gaap_RestructuringSettlementAndImpairmentProvisions	$ (17)us-gaap_RestructuringSettlementAndImpairmentProvisions
Special items net charges	0leco_SpecialItemsChargeGain	17,648leco_SpecialItemsChargeGain
Other current assets	138,165us-gaap_OtherAssetsCurrent		167,596us-gaap_OtherAssetsCurrent
Other current liabilities	254,496us-gaap_OtherLiabilitiesCurrent		221,771us-gaap_OtherLiabilitiesCurrent
Assets Held-for-sale [Member]
Rationalization and Asset Impairments
Other current assets	29,307us-gaap_OtherAssetsCurrent / us-gaap_LongLivedAssetsHeldForSaleByAssetTypeAxis = us-gaap_AssetsHeldForSaleMember
Other current liabilities	8,482us-gaap_OtherLiabilitiesCurrent / us-gaap_LongLivedAssetsHeldForSaleByAssetTypeAxis = us-gaap_AssetsHeldForSaleMember
North America Welding
Rationalization and Asset Impairments
Special items net charges	0leco_SpecialItemsChargeGain / us-gaap_StatementBusinessSegmentsAxis = leco_NorthAmericaWeldingMember	(47)leco_SpecialItemsChargeGain / us-gaap_StatementBusinessSegmentsAxis = leco_NorthAmericaWeldingMember
Europe Welding
Rationalization and Asset Impairments
Special items net charges	0leco_SpecialItemsChargeGain / us-gaap_StatementBusinessSegmentsAxis = leco_EuropeWeldingMember	39leco_SpecialItemsChargeGain / us-gaap_StatementBusinessSegmentsAxis = leco_EuropeWeldingMember
Restructuring reserve	$ 110us-gaap_RestructuringReserve / us-gaap_StatementBusinessSegmentsAxis = leco_EuropeWeldingMember

X

- Definition

This element represents adjustments to earnings before interest and taxes attributable to special item charges and gains allocable to the entity's segments.

+ References

No definition available.

+ Details

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

X

- Definition

Aggregate carrying amount, as of the balance sheet date, of current assets not separately disclosed in the balance sheet. Current assets are expected to be realized or consumed within one year (or the normal operating cycle, if longer).

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 210

-SubTopic 10

-Section S99

-Paragraph 1

-Subparagraph (SX 210.5-02.8)

-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682



Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Section 02

-Paragraph 8

-Article 5

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

X

- Definition

Aggregate carrying amount of current liabilities (due within one year or within the normal operating cycle if longer) not separately disclosed in the balance sheet. Includes costs that are statutory in nature, are incurred on contractual obligations, or accumulate over time and for which invoices have not yet been received or will not be rendered and of liabilities not separately disclosed.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Section 02

-Paragraph 20

-Article 5



Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 210

-SubTopic 10

-Section S99

-Paragraph 1

-Subparagraph (SX 210.5-02.20)

-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682



Reference 3: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 210

-SubTopic 10

-Section 45

-Paragraph 6

-URI http://asc.fasb.org/extlink&oid=28358313&loc=d3e6911-107765



Reference 4: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 210

-SubTopic 10

-Section 45

-Paragraph 5

-URI http://asc.fasb.org/extlink&oid=28358313&loc=d3e6904-107765

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
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X

- Details

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
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X

- Definition

Carrying amount (including both current and noncurrent portions of the accrual) as of the balance sheet date pertaining to a specified type of cost associated with exit from or disposal of business activities or restructuring pursuant to a duly authorized plan.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 420

-SubTopic 10

-Section S99

-Paragraph 2

-Subparagraph (SAB TOPIC 5.P.4(b))

-URI http://asc.fasb.org/extlink&oid=27011515&loc=d3e140904-122747



Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher SEC

-Name Staff Accounting Bulletin (SAB)

-Number Topic 5

-Section P

-Subsection 3, 4

+ Details

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

X

- Definition

The aggregate amount provided for estimated restructuring charges, remediation costs, and asset impairment loss during an accounting period. Generally, these items are either unusual or infrequent, but not both (in which case they would be extraordinary items).

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 225

-SubTopic 10

-Section S99

-Paragraph 2

-Subparagraph (SX 210.5-03.3)

-URI http://asc.fasb.org/extlink&oid=26872669&loc=d3e20235-122688

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Namespace Prefix:	us-gaap_
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Balance Type:	debit
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Namespace Prefix:
Data Type:	na
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X

- Details

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X

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