XML 55 R43.htm IDEA: XBRL DOCUMENT v3.10.0.1

Pre-Production Costs Related to Long-Term Supply Agreements - Narrative (Details) - USD ($) $ in Millions	9 Months Ended
	Sep. 29, 2018	Sep. 30, 2017
Deferred Costs, Capitalized, Prepaid, and Other Assets Disclosure [Abstract]
Pre-production E&D costs for which reimbursement is contractually guaranteed by the customer	$ 167.6	$ 190.8
Pre-production tooling costs related to customer-owned tools for which reimbursement is contractually guaranteed by the customer	121.1	93.5
Cash collected related to E&D and tooling costs	$ 277.4	$ 247.7

X

- Definition

Amount of recoverable preproduction engineering and design costs related to long term supply agreements capitalized during the reporting period.

+ References

No definition available.

+ Details

Name:	lear_PreproductionEngineeringAndDevelopmentCostsRelatedToLongTermSupplyArrangementsCostsCapitalized
Namespace Prefix:	lear_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

X

- Definition

Amount of recoverable preproduction tooling costs related to long term supply agreements capitalized during the reporting period.

+ References

No definition available.

+ Details

Name:	lear_PreproductionToolingCostsRelatedToLongTermSupplyArrangementsCostsCapitalized
Namespace Prefix:	lear_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

X

- Definition

Cash recoveries of preproduction engineering, design and tooling costs incurred on behalf of a customer.

+ References

No definition available.

+ Details

Name:	lear_RecoveriesOfPreproductionCostsRelatedToLongTermSupplyAgreements
Namespace Prefix:	lear_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

X

- References

No definition available.

+ Details

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