XML 70 R55.htm IDEA: XBRL DOCUMENT
v3.24.0.1

Acquisitions - Pro Forma Information Adjustments (Details) - USD ($) $ in Thousands | 12 Months Ended
--- | ---
Dec. 30, 2023 | Dec. 31, 2022
Business Acquisition, Pro Forma Information, Nonrecurring Adjustment |  |
Net income | $ 260,812 | $ 402,470
Inventory amortization period (in years) |  | 4 months
Amortization |  |
Business Acquisition, Pro Forma Information, Nonrecurring Adjustment |  |
Net income | (479) | $ (10,388)
Depreciation |  |
Business Acquisition, Pro Forma Information, Nonrecurring Adjustment |  |
Net income | 0 | 1,979
Transaction costs |  |
Business Acquisition, Pro Forma Information, Nonrecurring Adjustment |  |
Net income | 1,203 | 7,905
Amortization of inventory step-up |  |
Business Acquisition, Pro Forma Information, Nonrecurring Adjustment |  |
Net income | 0 | 15,593
Interest expense |  |
Business Acquisition, Pro Forma Information, Nonrecurring Adjustment |  |
Net income | 0 | 815
Income tax (expense) benefit of above items |  |
Business Acquisition, Pro Forma Information, Nonrecurring Adjustment |  |
Net income | $ (91) | $ (4,701)

X
- Definition Inventory Amortization Period + References No definition available. + Details
Name: | lfus_InventoryAmortizationPeriod
Namespace Prefix: | lfus_
Data Type: | xbrli:durationItemType
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_BusinessAcquisitionProFormaInformationNonrecurringAdjustmentLineItems
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition The pro forma net Income or Loss for the period as if the business combination or combinations had been completed at the beginning of a period. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 805 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 2 -Subparagraph (h)(2) -Publisher FASB -URI https://asc.fasb.org//1943274/2147479328/805-10-50-2 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Topic 805 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 2 -Subparagraph (h)(3) -Publisher FASB -URI https://asc.fasb.org//1943274/2147479328/805-10-50-2 + Details
Name: | us-gaap_BusinessAcquisitionsProFormaNetIncomeLoss
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Details
Name: | us-gaap_NonrecurringAdjustmentAxis=lfus_AdjustmentToAmortizationMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_NonrecurringAdjustmentAxis=lfus_AdjustmentToDepreciationMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_NonrecurringAdjustmentAxis=us-gaap_AcquisitionRelatedCostsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_NonrecurringAdjustmentAxis=lfus_AmortizationOfInventoryStepUpMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_NonrecurringAdjustmentAxis=lfus_AdjustmentsRelatedToInterestExpenseMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_NonrecurringAdjustmentAxis=lfus_AdjustmentToIncomeTaxMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |