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Leases - Narrative (Details) $ in Millions | 3 Months Ended | 9 Months Ended
--- | --- | ---
Oct. 01, 2022 USD ($) | Oct. 01, 2022 USD ($)
Lessee, Lease, Description |  |
Impairment of right of use assets |  | $ 6.4
Russia-Ukraine Conflict |  |
Lessee, Lease, Description |  |
Impairment of right of use assets | $ 7.0 | 7.0
Kongsberg ICS |  |
Lessee, Lease, Description |  |
Right of use asset | 34.1 | 34.1
Lease liability | $ 34.1 | $ 34.1

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- Definition Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Lease Liability + References No definition available. + Details
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Namespace Prefix: | lear_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

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- Definition Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Right Of Use Asset + References No definition available. + Details
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Namespace Prefix: | lear_
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Balance Type: | debit
Period Type: | instant

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

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- Definition Amount of loss from impairment of right-of-use asset from operating lease. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 842 -SubTopic 20 -Section 25 -Paragraph 6 -Subparagraph (c) -URI https://asc.fasb.org/extlink&oid=123399704&loc=SL77918431-209957 + Details
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Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

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- Details
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Namespace Prefix: |
Data Type: | na
Balance Type: |
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- Details
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Namespace Prefix: |
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Balance Type: |
Period Type: |