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v3.22.2.2

Commitments and Contingencies (Narrative) (Details) | Sep. 30, 2022
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Loss Contingencies [Line Items] |
Operating lease, right-of-use asset, percentage related to leases of real estate | 0.79

X
- Definition Operating Lease, Right-Of-Use Asset, Percentage Related To Leases Of Real Estate + References No definition available. + Details
Name: | lii_OperatingLeaseRightOfUseAssetPercentageRelatedToLeasesOfRealEstate
Namespace Prefix: | lii_
Data Type: | xbrli:pureItemType
Balance Type: | na
Period Type: | instant

X
- 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_LossContingenciesLineItems
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration