CONTINGENCIES - Litigation Contingency Accrual (Details) - USD ($) $ in Millions	3 Months Ended
Mar. 31, 2021	Mar. 31, 2020
Loss Contingency Accrual [Roll Forward]
Litigation contingency accrual - Beginning of period	$ 0.5	$ 0.7
Adjustment to accruals - expense	0.2	0.1
Currency	0.0	(0.1)
Cash payments	0.0	(0.1)
Litigation contingency accrual - End of period	$ 0.7	$ 0.6

Loss Contingency Accrual, Foreign Currency Translation Gain (Loss)

No definition available.

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Namespace Prefix:	leg_
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Period Type:	duration

- Definition

Proceeds From (Payments For) Legal Settlements

+ References

No definition available.

+ Details

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

- Definition

Amount of loss contingency liability.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 450
-SubTopic 20
-Section 50
-Paragraph 1
-URI http://asc.fasb.org/extlink&oid=121557415&loc=d3e14326-108349

+ Details

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Balance Type:	credit
Period Type:	instant

- Definition

Amount charged against operating income increasing loss contingency liability, after adjustments to reduce previously estimated charges.

+ References

+ Details

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- Definition

A roll forward is a reconciliation of a concept from the beginning of a period to the end of a period.

+ References

No definition available.

+ Details

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