XML 51 R42.htm IDEA: XBRL DOCUMENT
v3.22.1

Commitments and Contingencies (Narrative) (Details) $ in Millions | 3 Months Ended
--- | ---
Mar. 31, 2022 USD ($) | Mar. 31, 2021 USD ($)
Loss Contingencies [Line Items] |  |
Operating lease, right-of-use asset, percentage related to leases of real estate | 0.79 |
Expense for asbestos-related litigation | $ 1.7 | $ 1.1

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 Amount, after effects of reinsurance, of expense for claims incurred and costs incurred in the claim settlement process attributable to asbestos and environmental claims. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 944 -SubTopic 40 -Section 50 -Paragraph 3 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=116884095&loc=d3e14764-158437 + Details
Name: | us-gaap_LiabilityForAsbestosAndEnvironmentalClaimsNetIncurredLoss1
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

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