XML 66 R56.htm IDEA: XBRL DOCUMENT
v3.19.2

Lines of Credit and Financing Arrangements (Asset Securitization Program) (Details) - USD ($) | 6 Months Ended |
--- | --- | ---
Jun. 30, 2019 | Dec. 31, 2018
Line of Credit Facility [Line Items] |  |
Asset Securitization Borrowing Capacity | $ 0 | $ 22,000,000.0
Maximum securitization as percentage of net pool balance | 100.00% |
Program fee percentage | 0.70% |
Average floating commercial paper rate (as a percent) | 3.11% | 3.27%
Unused fee (as a percent) | 101.00% |
Fixed rate of agreement (as a percent) | 0.35% |
Senior Unsecured Notes [Member] |  |
Line of Credit Facility [Line Items] |  |
Minimum principal amount accelerated | $ 75,000,000.0 |
Minimum [Member] |  |
Line of Credit Facility [Line Items] |  |
Asset Securitization Borrowing Capacity | 225,000,000.0 |
Maximum [Member] |  |
Line of Credit Facility [Line Items] |  |
Asset Securitization Borrowing Capacity | $ 380,000,000.0 |

X
- Definition Asset securitization borrowing capacity. + References No definition available. + Details
Name: | lii_AssetSecuritizationBorrowingCapacity
Namespace Prefix: | lii_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Average floating commercial paper rate. + References No definition available. + Details
Name: | lii_AverageFloatingCommercialPaperRate
Namespace Prefix: | lii_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | instant

X
- Definition Fixed rate of agreement. + References No definition available. + Details
Name: | lii_FixedRateOfAgreement
Namespace Prefix: | lii_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | duration

X
- Definition Maximum securitization as percentage of net pool balance. + References No definition available. + Details
Name: | lii_MaximumSecuritizationAsPercentageOfNetPoolBalance
Namespace Prefix: | lii_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | instant

X
- Definition Minimum amount of principal or interest due on indebtedness or receivable securitization. + References No definition available. + Details
Name: | lii_MinimumAmountOfPrincipalOrInterestDueOnIndebtednessOrReceivableSecuritization
Namespace Prefix: | lii_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition Percentage of maximum available amount used to charge unused fee. + References No definition available. + Details
Name: | lii_PercentageOfMaximumAvailableAmountUsedToChargeUnusedFee
Namespace Prefix: | lii_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | duration

X
- Definition Program fee. + References No definition available. + Details
Name: | lii_ProgramFee
Namespace Prefix: | lii_
Data Type: | num:percentItemType
Balance Type: | na
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_LineOfCreditFacilityLineItems
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Details
Name: | us-gaap_LongtermDebtTypeAxis=us-gaap_SeniorNotesMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | srt_RangeAxis=srt_MinimumMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | srt_RangeAxis=srt_MaximumMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |