XML 105 R63.htm IDEA: XBRL DOCUMENT v2.4.1.9
Debt - Additional Information (Detail) (USD $)
 1 Months Ended 3 Months Ended 12 Months Ended 1 Months Ended 0 Months Ended 3 Months Ended 1 Months Ended
Mar. 29, 2014
Dec. 31, 2014
Dec. 31, 2014
Dec. 31, 2013
Dec. 31, 2012
Nov. 30, 2014
Aug. 24, 2012
Mar. 29, 2014
Jan. 30, 2013
Jan. 31, 2015
Oct. 31, 2014
Debt Instrument [Line Items]                      
Repurchase of senior notes $ (327,100,000)us-gaap_RepaymentsOfUnsecuredDebt   $ (327,100,000)us-gaap_RepaymentsOfUnsecuredDebt $ (72,100,000)us-gaap_RepaymentsOfUnsecuredDebt $ (72,100,000)us-gaap_RepaymentsOfUnsecuredDebt            
Loss on extinguishment of debt   17,500,000us-gaap_GainsLossesOnExtinguishmentOfDebt 17,900,000us-gaap_GainsLossesOnExtinguishmentOfDebt 3,600,000us-gaap_GainsLossesOnExtinguishmentOfDebt 3,700,000us-gaap_GainsLossesOnExtinguishmentOfDebt            
Payment for redemption of aggregate principal amount         70,000,000us-gaap_DebtInstrumentRepurchasedFaceAmount            
Compliance with covenants under Notes     As of December 31, 2014, the Company was in compliance with all covenants under the indentures governing the Notes.                
Percentage owned, domestic subsidiaries     1lea_PercentageOwnedDomesticSubsidiaries                
Line of credit facility, covenants and restrictions     The Credit Agreement contains various customary representations, warranties and covenants by the Company, including, without limitation, (i) covenants regarding maximum leverage and minimum interest coverage, (ii) limitations on fundamental changes involving the Company or its subsidiaries and (iii) limitations on indebtedness, liens, investments and restricted payments.                
5.25% Senior Notes due 2025                      
Debt Instrument [Line Items]                      
Proceeds from issuance of debt           650,000,000us-gaap_ProceedsFromIssuanceOfLongTermDebt
/ us-gaap_DebtInstrumentAxis
= lea_SeniorNotesDueTwoThousandTwentyFiveMember		          
Debt issuance cost           8,400,000us-gaap_DebtIssuanceCosts
/ us-gaap_DebtInstrumentAxis
= lea_SeniorNotesDueTwoThousandTwentyFiveMember		          
Term Loan Facility                      
Debt Instrument [Line Items]                      
Long-term debt, aggregate principal amount           500,000,000us-gaap_DebtInstrumentFaceAmount
/ us-gaap_DebtInstrumentAxis
= lea_TermLoanFacilityMember		          
Line of credit                      
Debt Instrument [Line Items]                      
Borrowings under revolving credit facility     22,000,000us-gaap_ProceedsFromLinesOfCredit
/ us-gaap_LineOfCreditFacilityAxis
= us-gaap_LineOfCreditMember		                
Repayments under revolving credit facility     22,000,000us-gaap_RepaymentsOfLinesOfCredit
/ us-gaap_LineOfCreditFacilityAxis
= us-gaap_LineOfCreditMember		 518,700,000us-gaap_RepaymentsOfLinesOfCredit
/ us-gaap_LineOfCreditFacilityAxis
= us-gaap_LineOfCreditMember		              
Line of credit facility, compliance with covenants     As of December 31, 2014, the Company was in compliance with all covenants under the credit agreement.                
Line of credit | Minimum                      
Debt Instrument [Line Items]                      
Line of credit facility, facility fee     0.25%us-gaap_LineOfCreditFacilityCommitmentFeePercentage
/ us-gaap_LineOfCreditFacilityAxis
= us-gaap_LineOfCreditMember
/ us-gaap_RangeAxis
= us-gaap_MinimumMember		                
Line of credit | Maximum                      
Debt Instrument [Line Items]                      
Line of credit facility, facility fee     0.50%us-gaap_LineOfCreditFacilityCommitmentFeePercentage
/ us-gaap_LineOfCreditFacilityAxis
= us-gaap_LineOfCreditMember
/ us-gaap_RangeAxis
= us-gaap_MaximumMember		                
Line of credit | Domestic subsidiaries                      
Debt Instrument [Line Items]                      
Percentage of stock secured on a first priority basis   100.00%lea_PercentageOfStock
/ dei_LegalEntityAxis
= lea_DomesticSubsidiariesMember
/ us-gaap_LineOfCreditFacilityAxis
= us-gaap_LineOfCreditMember		 100.00%lea_PercentageOfStock
/ dei_LegalEntityAxis
= lea_DomesticSubsidiariesMember
/ us-gaap_LineOfCreditFacilityAxis
= us-gaap_LineOfCreditMember		                
Line of credit | Foreign subsidiaries                      
Debt Instrument [Line Items]                      
Percentage of stock secured on a first priority basis   65.00%lea_PercentageOfStock
/ dei_LegalEntityAxis
= lea_ForeignSubsidiariesMember
/ us-gaap_LineOfCreditFacilityAxis
= us-gaap_LineOfCreditMember		 65.00%lea_PercentageOfStock
/ dei_LegalEntityAxis
= lea_ForeignSubsidiariesMember
/ us-gaap_LineOfCreditFacilityAxis
= us-gaap_LineOfCreditMember		                
Line of credit | Eurodollar                      
Debt Instrument [Line Items]                      
Minimum interest rate margin     1.00%us-gaap_DebtInstrumentInterestRateStatedPercentageRateRangeMinimum
/ us-gaap_DebtInstrumentAxis
= us-gaap_EurodollarMember
/ us-gaap_LineOfCreditFacilityAxis
= us-gaap_LineOfCreditMember		                
Maximum interest rate margin     2.25%us-gaap_DebtInstrumentInterestRateStatedPercentageRateRangeMaximum
/ us-gaap_DebtInstrumentAxis
= us-gaap_EurodollarMember
/ us-gaap_LineOfCreditFacilityAxis
= us-gaap_LineOfCreditMember		                
Line of credit facility, interest rate at period end   1.50%us-gaap_LineOfCreditFacilityInterestRateAtPeriodEnd
/ us-gaap_DebtInstrumentAxis
= us-gaap_EurodollarMember
/ us-gaap_LineOfCreditFacilityAxis
= us-gaap_LineOfCreditMember		 1.50%us-gaap_LineOfCreditFacilityInterestRateAtPeriodEnd
/ us-gaap_DebtInstrumentAxis
= us-gaap_EurodollarMember
/ us-gaap_LineOfCreditFacilityAxis
= us-gaap_LineOfCreditMember		                
Line of credit | Base Rate                      
Debt Instrument [Line Items]                      
Minimum interest rate margin     0.00%us-gaap_DebtInstrumentInterestRateStatedPercentageRateRangeMinimum
/ us-gaap_DebtInstrumentAxis
= us-gaap_BaseRateMember
/ us-gaap_LineOfCreditFacilityAxis
= us-gaap_LineOfCreditMember		                
Maximum interest rate margin     1.25%us-gaap_DebtInstrumentInterestRateStatedPercentageRateRangeMaximum
/ us-gaap_DebtInstrumentAxis
= us-gaap_BaseRateMember
/ us-gaap_LineOfCreditFacilityAxis
= us-gaap_LineOfCreditMember		                
Line of credit facility, interest rate at period end   0.50%us-gaap_LineOfCreditFacilityInterestRateAtPeriodEnd
/ us-gaap_DebtInstrumentAxis
= us-gaap_BaseRateMember
/ us-gaap_LineOfCreditFacilityAxis
= us-gaap_LineOfCreditMember		 0.50%us-gaap_LineOfCreditFacilityInterestRateAtPeriodEnd
/ us-gaap_DebtInstrumentAxis
= us-gaap_BaseRateMember
/ us-gaap_LineOfCreditFacilityAxis
= us-gaap_LineOfCreditMember		                
Other short-term borrowings                      
Debt Instrument [Line Items]                      
Line of credit facility borrowing capacity   5,300,000us-gaap_LineOfCreditFacilityMaximumBorrowingCapacity
/ us-gaap_LineOfCreditFacilityAxis
= lea_OtherShortTermBorrowingsMember		 5,300,000us-gaap_LineOfCreditFacilityMaximumBorrowingCapacity
/ us-gaap_LineOfCreditFacilityAxis
= lea_OtherShortTermBorrowingsMember		 5,400,000us-gaap_LineOfCreditFacilityMaximumBorrowingCapacity
/ us-gaap_LineOfCreditFacilityAxis
= lea_OtherShortTermBorrowingsMember		              
7.875% Senior Notes due 2018                      
Debt Instrument [Line Items]                      
Stated coupon rate   7.875%us-gaap_DebtInstrumentInterestRateStatedPercentage
/ us-gaap_LongtermDebtTypeAxis
= lea_SeniorNotesDueTwoThousandEighteenMember		 7.875%us-gaap_DebtInstrumentInterestRateStatedPercentage
/ us-gaap_LongtermDebtTypeAxis
= lea_SeniorNotesDueTwoThousandEighteenMember		 7.875%us-gaap_DebtInstrumentInterestRateStatedPercentage
/ us-gaap_LongtermDebtTypeAxis
= lea_SeniorNotesDueTwoThousandEighteenMember		              
Long-term debt, yield to maturity       8.00%us-gaap_DebtInstrumentInterestRateEffectivePercentage
/ us-gaap_LongtermDebtTypeAxis
= lea_SeniorNotesDueTwoThousandEighteenMember		              
Percentage of debt redemption         10.00%us-gaap_DebtInstrumentRedemptionPricePercentageOfPrincipalAmountRedeemed
/ us-gaap_LongtermDebtTypeAxis
= lea_SeniorNotesDueTwoThousandEighteenMember		            
Redemption price equal to percentage of principal amount redeemed         103.00%lea_DebtRedemptionFixedPricePercentOfPar
/ us-gaap_LongtermDebtTypeAxis
= lea_SeniorNotesDueTwoThousandEighteenMember		            
Payment for redemption of aggregate principal amount 280,000,000us-gaap_DebtInstrumentRepurchasedFaceAmount
/ us-gaap_LongtermDebtTypeAxis
= lea_SeniorNotesDueTwoThousandEighteenMember		             280,000,000us-gaap_DebtInstrumentRepurchasedFaceAmount
/ us-gaap_LongtermDebtTypeAxis
= lea_SeniorNotesDueTwoThousandEighteenMember		 70,000,000us-gaap_DebtInstrumentRepurchasedFaceAmount
/ us-gaap_LongtermDebtTypeAxis
= lea_SeniorNotesDueTwoThousandEighteenMember		    
8.125% Senior Notes due 2020                      
Debt Instrument [Line Items]                      
Long-term debt, aggregate principal amount   245,000,000us-gaap_DebtInstrumentFaceAmount
/ us-gaap_LongtermDebtTypeAxis
= lea_SeniorNotesDueTwoThousandTwentyMember		 245,000,000us-gaap_DebtInstrumentFaceAmount
/ us-gaap_LongtermDebtTypeAxis
= lea_SeniorNotesDueTwoThousandTwentyMember		                
Stated coupon rate   8.125%us-gaap_DebtInstrumentInterestRateStatedPercentage
/ us-gaap_LongtermDebtTypeAxis
= lea_SeniorNotesDueTwoThousandTwentyMember		 8.125%us-gaap_DebtInstrumentInterestRateStatedPercentage
/ us-gaap_LongtermDebtTypeAxis
= lea_SeniorNotesDueTwoThousandTwentyMember		 8.125%us-gaap_DebtInstrumentInterestRateStatedPercentage
/ us-gaap_LongtermDebtTypeAxis
= lea_SeniorNotesDueTwoThousandTwentyMember		              
Long-term debt, price   99.164%lea_DebtInstrumentPrice
/ us-gaap_LongtermDebtTypeAxis
= lea_SeniorNotesDueTwoThousandTwentyMember		 99.164%lea_DebtInstrumentPrice
/ us-gaap_LongtermDebtTypeAxis
= lea_SeniorNotesDueTwoThousandTwentyMember		                
Long-term debt, yield to maturity   8.25%us-gaap_DebtInstrumentInterestRateEffectivePercentage
/ us-gaap_LongtermDebtTypeAxis
= lea_SeniorNotesDueTwoThousandTwentyMember		 8.25%us-gaap_DebtInstrumentInterestRateEffectivePercentage
/ us-gaap_LongtermDebtTypeAxis
= lea_SeniorNotesDueTwoThousandTwentyMember		 8.25%us-gaap_DebtInstrumentInterestRateEffectivePercentage
/ us-gaap_LongtermDebtTypeAxis
= lea_SeniorNotesDueTwoThousandTwentyMember		              
Percentage of debt redemption             10.00%us-gaap_DebtInstrumentRedemptionPricePercentageOfPrincipalAmountRedeemed
/ us-gaap_LongtermDebtTypeAxis
= lea_SeniorNotesDueTwoThousandTwentyMember		 10.00%us-gaap_DebtInstrumentRedemptionPricePercentageOfPrincipalAmountRedeemed
/ us-gaap_LongtermDebtTypeAxis
= lea_SeniorNotesDueTwoThousandTwentyMember		      
Percentage of debt redemption price             1.03%us-gaap_DebtInstrumentRedemptionPricePercentage
/ us-gaap_LongtermDebtTypeAxis
= lea_SeniorNotesDueTwoThousandTwentyMember		        
Payment for redemption of aggregate principal amount 35,000,000us-gaap_DebtInstrumentRepurchasedFaceAmount
/ us-gaap_LongtermDebtTypeAxis
= lea_SeniorNotesDueTwoThousandTwentyMember		             35,000,000us-gaap_DebtInstrumentRepurchasedFaceAmount
/ us-gaap_LongtermDebtTypeAxis
= lea_SeniorNotesDueTwoThousandTwentyMember		      
Debt instrument, payment terms     Interest is payable on March 15 and September 15 of each year                
Description of notes restrictive covenants     The indenture governing the 2020 Notes contains restrictive covenants that, among other things, limit the ability of the Company and its subsidiaries to: (i) incur additional debt, (ii) pay dividends and make other restricted payments, (iii) create or permit certain liens, (iv) issue or sell capital stock of the Company’s restricted subsidiaries, (v) use the proceeds from sales of assets and subsidiary stock, (vi) create or permit restrictions on the ability of the Company’s restricted subsidiaries to pay dividends or make other distributions to the Company, (vii) enter into transactions with affiliates, (viii) enter into sale and leaseback transactions and (ix) consolidate or merge or sell all or substantially all of the Company’s assets. The foregoing limitations are subject to exceptions as set forth in the 2020 Notes. In addition, if in the future the 2020 Notes have an investment grade credit rating from both Moody’s Investors Service and Standard & Poor’s Ratings Services and no default has occurred and is continuing, certain of these covenants will, thereafter, no longer apply to the 2020 Notes for so long as the 2020 Notes have an investment grade credit rating by both rating agencies. The indenture governing the 2020 Notes also provides for customary events of default.                
4.75% Senior Notes due 2023                      
Debt Instrument [Line Items]                      
Long-term debt, aggregate principal amount   500,000,000us-gaap_DebtInstrumentFaceAmount
/ us-gaap_LongtermDebtTypeAxis
= lea_SeniorNotesDueTwoThousandTwentyThreeMember		 500,000,000us-gaap_DebtInstrumentFaceAmount
/ us-gaap_LongtermDebtTypeAxis
= lea_SeniorNotesDueTwoThousandTwentyThreeMember		                
Stated coupon rate   4.75%us-gaap_DebtInstrumentInterestRateStatedPercentage
/ us-gaap_LongtermDebtTypeAxis
= lea_SeniorNotesDueTwoThousandTwentyThreeMember		 4.75%us-gaap_DebtInstrumentInterestRateStatedPercentage
/ us-gaap_LongtermDebtTypeAxis
= lea_SeniorNotesDueTwoThousandTwentyThreeMember		 4.75%us-gaap_DebtInstrumentInterestRateStatedPercentage
/ us-gaap_LongtermDebtTypeAxis
= lea_SeniorNotesDueTwoThousandTwentyThreeMember		              
Long-term debt, yield to maturity   4.75%us-gaap_DebtInstrumentInterestRateEffectivePercentage
/ us-gaap_LongtermDebtTypeAxis
= lea_SeniorNotesDueTwoThousandTwentyThreeMember		 4.75%us-gaap_DebtInstrumentInterestRateEffectivePercentage
/ us-gaap_LongtermDebtTypeAxis
= lea_SeniorNotesDueTwoThousandTwentyThreeMember		 4.75%us-gaap_DebtInstrumentInterestRateEffectivePercentage
/ us-gaap_LongtermDebtTypeAxis
= lea_SeniorNotesDueTwoThousandTwentyThreeMember		              
Proceeds from issuance of debt                 500,000,000us-gaap_ProceedsFromIssuanceOfLongTermDebt
/ us-gaap_LongtermDebtTypeAxis
= lea_SeniorNotesDueTwoThousandTwentyThreeMember		    
Debt issuance cost                 7,400,000us-gaap_DebtIssuanceCosts
/ us-gaap_LongtermDebtTypeAxis
= lea_SeniorNotesDueTwoThousandTwentyThreeMember		    
Debt instrument, payment terms     Interest is payable on January 15 and July 15 of each year                
Description of notes restrictive covenants     Subject to certain exceptions, the indentures governing the 2023 Notes, 2024 Notes and 2025 Notes contain restrictive covenants that, among other things, limit the ability of the Company to: (i) create or permit certain liens and (ii) consolidate or merge or sell all or substantially all of the Company’s assets. In addition, the indentures governing the 2023 Notes and 2024 Notes limit the ability of the Company to enter into sale and leaseback transactions. The indentures governing the Notes also provide for customary events of default.                
4.75% Senior Notes due 2023 | Prior to January 15, 2018                      
Debt Instrument [Line Items]                      
Senior notes, redemption price percentage, make whole premium   100.00%lea_DebtRedemptionPricePercentOfParMakeWholePremium
/ us-gaap_LongtermDebtTypeAxis
= lea_SeniorNotesDueTwoThousandTwentyThreeMember
/ lea_PeriodAxis
= lea_PriorToJanuaryFifteenTwoThousandEighteenMember		 100.00%lea_DebtRedemptionPricePercentOfParMakeWholePremium
/ us-gaap_LongtermDebtTypeAxis
= lea_SeniorNotesDueTwoThousandTwentyThreeMember
/ lea_PeriodAxis
= lea_PriorToJanuaryFifteenTwoThousandEighteenMember		                
4.75% Senior Notes due 2023 | Prior to January 15, 2016                      
Debt Instrument [Line Items]                      
Percentage of debt redemption price     104.75%us-gaap_DebtInstrumentRedemptionPricePercentage
/ us-gaap_LongtermDebtTypeAxis
= lea_SeniorNotesDueTwoThousandTwentyThreeMember
/ lea_PeriodAxis
= lea_PriorToJanuaryFifteenTwoThousandSixteenMember		                
Senior notes, redeemable percentage of the aggregate principal amount of the Notes in equity offerings     35.00%lea_PercentageOfRedeemableNotesMaximumEquityOffering
/ us-gaap_LongtermDebtTypeAxis
= lea_SeniorNotesDueTwoThousandTwentyThreeMember
/ lea_PeriodAxis
= lea_PriorToJanuaryFifteenTwoThousandSixteenMember		                
Outstanding original aggregate principal amount     65.00%lea_PercentageOfRedeemableNotesMinimum
/ us-gaap_LongtermDebtTypeAxis
= lea_SeniorNotesDueTwoThousandTwentyThreeMember
/ lea_PeriodAxis
= lea_PriorToJanuaryFifteenTwoThousandSixteenMember		                
8.125% Senior Notes due 2020                      
Debt Instrument [Line Items]                      
Percentage of debt redemption 10.00%us-gaap_DebtInstrumentRedemptionPricePercentageOfPrincipalAmountRedeemed
/ us-gaap_LongtermDebtTypeAxis
= lea_SeniorNotesDueTwentyTwentyMember		                    
Percentage of debt redemption price     104.063%us-gaap_DebtInstrumentRedemptionPricePercentage
/ us-gaap_LongtermDebtTypeAxis
= lea_SeniorNotesDueTwentyTwentyMember		                
Restricted cash, current   250,000,000us-gaap_RestrictedCashAndInvestmentsCurrent
/ us-gaap_LongtermDebtTypeAxis
= lea_SeniorNotesDueTwentyTwentyMember		 250,000,000us-gaap_RestrictedCashAndInvestmentsCurrent
/ us-gaap_LongtermDebtTypeAxis
= lea_SeniorNotesDueTwentyTwentyMember		                
5.375% Senior Notes due 2024                      
Debt Instrument [Line Items]                      
Long-term debt, aggregate principal amount   325,000,000us-gaap_DebtInstrumentFaceAmount
/ us-gaap_LongtermDebtTypeAxis
= lea_SeniorNotesDueTwoThousandTwentyFourMember		 325,000,000us-gaap_DebtInstrumentFaceAmount
/ us-gaap_LongtermDebtTypeAxis
= lea_SeniorNotesDueTwoThousandTwentyFourMember		                
Stated coupon rate   5.375%us-gaap_DebtInstrumentInterestRateStatedPercentage
/ us-gaap_LongtermDebtTypeAxis
= lea_SeniorNotesDueTwoThousandTwentyFourMember		 5.375%us-gaap_DebtInstrumentInterestRateStatedPercentage
/ us-gaap_LongtermDebtTypeAxis
= lea_SeniorNotesDueTwoThousandTwentyFourMember		                
Long-term debt, yield to maturity   5.375%us-gaap_DebtInstrumentInterestRateEffectivePercentage
/ us-gaap_LongtermDebtTypeAxis
= lea_SeniorNotesDueTwoThousandTwentyFourMember		 5.375%us-gaap_DebtInstrumentInterestRateEffectivePercentage
/ us-gaap_LongtermDebtTypeAxis
= lea_SeniorNotesDueTwoThousandTwentyFourMember		                
Proceeds from issuance of debt 325,000,000us-gaap_ProceedsFromIssuanceOfLongTermDebt
/ us-gaap_LongtermDebtTypeAxis
= lea_SeniorNotesDueTwoThousandTwentyFourMember		                    
Debt issuance cost 3,900,000us-gaap_DebtIssuanceCosts
/ us-gaap_LongtermDebtTypeAxis
= lea_SeniorNotesDueTwoThousandTwentyFourMember		                    
Debt instrument, payment terms     Interest is payable on March 15 and September 15 of each year.                
Description of notes restrictive covenants     Subject to certain exceptions, the indentures governing the 2023 Notes, 2024 Notes and 2025 Notes contain restrictive covenants that, among other things, limit the ability of the Company to: (i) create or permit certain liens and (ii) consolidate or merge or sell all or substantially all of the Company’s assets. In addition, the indentures governing the 2023 Notes and 2024 Notes limit the ability of the Company to enter into sale and leaseback transactions. The indentures governing the Notes also provide for customary events of default.                
5.375% Senior Notes due 2024 | Prior to March 15, 2017                      
Debt Instrument [Line Items]                      
Percentage of debt redemption price     105.375%us-gaap_DebtInstrumentRedemptionPricePercentage
/ us-gaap_LongtermDebtTypeAxis
= lea_SeniorNotesDueTwoThousandTwentyFourMember
/ lea_PeriodAxis
= lea_PriorToMarchFifteenTwoThousandSeventeenMember		                
Senior notes, redeemable percentage of the aggregate principal amount of the Notes in equity offerings     35.00%lea_PercentageOfRedeemableNotesMaximumEquityOffering
/ us-gaap_LongtermDebtTypeAxis
= lea_SeniorNotesDueTwoThousandTwentyFourMember
/ lea_PeriodAxis
= lea_PriorToMarchFifteenTwoThousandSeventeenMember		                
Outstanding original aggregate principal amount     65.00%lea_PercentageOfRedeemableNotesMinimum
/ us-gaap_LongtermDebtTypeAxis
= lea_SeniorNotesDueTwoThousandTwentyFourMember
/ lea_PeriodAxis
= lea_PriorToMarchFifteenTwoThousandSeventeenMember		                
Redemption of notes     90 years                
5.375% Senior Notes due 2024 | Prior to March 15, 2019                      
Debt Instrument [Line Items]                      
Percentage of debt redemption price     100.00%us-gaap_DebtInstrumentRedemptionPricePercentage
/ us-gaap_LongtermDebtTypeAxis
= lea_SeniorNotesDueTwoThousandTwentyFourMember
/ lea_PeriodAxis
= lea_PriorToMarchFifteenTwoThousandNineteenMember		                
5.25% Senior Notes due 2025                      
Debt Instrument [Line Items]                      
Long-term debt, aggregate principal amount   650,000,000us-gaap_DebtInstrumentFaceAmount
/ us-gaap_LongtermDebtTypeAxis
= lea_SeniorNotesDueTwoThousandTwentyFiveMember		 650,000,000us-gaap_DebtInstrumentFaceAmount
/ us-gaap_LongtermDebtTypeAxis
= lea_SeniorNotesDueTwoThousandTwentyFiveMember		                
Stated coupon rate   5.25%us-gaap_DebtInstrumentInterestRateStatedPercentage
/ us-gaap_LongtermDebtTypeAxis
= lea_SeniorNotesDueTwoThousandTwentyFiveMember		 5.25%us-gaap_DebtInstrumentInterestRateStatedPercentage
/ us-gaap_LongtermDebtTypeAxis
= lea_SeniorNotesDueTwoThousandTwentyFiveMember		                
Long-term debt, yield to maturity   5.25%us-gaap_DebtInstrumentInterestRateEffectivePercentage
/ us-gaap_LongtermDebtTypeAxis
= lea_SeniorNotesDueTwoThousandTwentyFiveMember		 5.25%us-gaap_DebtInstrumentInterestRateEffectivePercentage
/ us-gaap_LongtermDebtTypeAxis
= lea_SeniorNotesDueTwoThousandTwentyFiveMember		                
Debt instrument, payment terms     Interest is payable on January 15 and July 15 of each year.                
Description of notes restrictive covenants     Subject to certain exceptions, the indentures governing the 2023 Notes, 2024 Notes and 2025 Notes contain restrictive covenants that, among other things, limit the ability of the Company to: (i) create or permit certain liens and (ii) consolidate or merge or sell all or substantially all of the Company’s assets. In addition, the indentures governing the 2023 Notes and 2024 Notes limit the ability of the Company to enter into sale and leaseback transactions. The indentures governing the Notes also provide for customary events of default.                
5.25% Senior Notes due 2025 | Prior to January 15, 2020                      
Debt Instrument [Line Items]                      
Percentage of debt redemption price     100.00%us-gaap_DebtInstrumentRedemptionPricePercentage
/ us-gaap_LongtermDebtTypeAxis
= lea_SeniorNotesDueTwoThousandTwentyFiveMember
/ lea_PeriodAxis
= lea_PriorToJanuaryFifteenTwoThousandTwentyMember		                
Redemption of notes     120 days                
5.25% Senior Notes due 2025 | Prior to January 15, 2018                      
Debt Instrument [Line Items]                      
Percentage of debt redemption price     105.25%us-gaap_DebtInstrumentRedemptionPricePercentage
/ us-gaap_LongtermDebtTypeAxis
= lea_SeniorNotesDueTwoThousandTwentyFiveMember
/ lea_PeriodAxis
= lea_PriorToJanuaryFifteenTwoThousandEighteenMember		                
Senior notes, redeemable percentage of the aggregate principal amount of the Notes in equity offerings     40.00%lea_PercentageOfRedeemableNotesMaximumEquityOffering
/ us-gaap_LongtermDebtTypeAxis
= lea_SeniorNotesDueTwoThousandTwentyFiveMember
/ lea_PeriodAxis
= lea_PriorToJanuaryFifteenTwoThousandEighteenMember		                
Outstanding original aggregate principal amount     50.00%lea_PercentageOfRedeemableNotesMinimum
/ us-gaap_LongtermDebtTypeAxis
= lea_SeniorNotesDueTwoThousandTwentyFiveMember
/ lea_PeriodAxis
= lea_PriorToJanuaryFifteenTwoThousandEighteenMember		                
Revolving Credit Facility                      
Debt Instrument [Line Items]                      
Line of credit facility borrowing capacity           1,250,000,000us-gaap_LineOfCreditFacilityMaximumBorrowingCapacity
/ us-gaap_CreditFacilityAxis
= us-gaap_RevolvingCreditFacilityMember		         1,000,000,000us-gaap_LineOfCreditFacilityMaximumBorrowingCapacity
/ us-gaap_CreditFacilityAxis
= us-gaap_RevolvingCreditFacilityMember
Loss on extinguishment of debt           400,000us-gaap_GainsLossesOnExtinguishmentOfDebt
/ us-gaap_CreditFacilityAxis
= us-gaap_RevolvingCreditFacilityMember		          
Debt issuance cost           5,800,000us-gaap_DebtIssuanceCosts
/ us-gaap_CreditFacilityAxis
= us-gaap_RevolvingCreditFacilityMember		          
Term Loan Facility | Eurodollar                      
Debt Instrument [Line Items]                      
Minimum interest rate margin     1.25%us-gaap_DebtInstrumentInterestRateStatedPercentageRateRangeMinimum
/ us-gaap_CreditFacilityAxis
= lea_TermLoanFacilityMember
/ us-gaap_DebtInstrumentAxis
= us-gaap_EurodollarMember		                
Maximum interest rate margin     2.25%us-gaap_DebtInstrumentInterestRateStatedPercentageRateRangeMaximum
/ us-gaap_CreditFacilityAxis
= lea_TermLoanFacilityMember
/ us-gaap_DebtInstrumentAxis
= us-gaap_EurodollarMember		                
Term Loan Facility | Base Rate                      
Debt Instrument [Line Items]                      
Minimum interest rate margin     0.25%us-gaap_DebtInstrumentInterestRateStatedPercentageRateRangeMinimum
/ us-gaap_CreditFacilityAxis
= lea_TermLoanFacilityMember
/ us-gaap_DebtInstrumentAxis
= us-gaap_BaseRateMember		                
Maximum interest rate margin     1.25%us-gaap_DebtInstrumentInterestRateStatedPercentageRateRangeMaximum
/ us-gaap_CreditFacilityAxis
= lea_TermLoanFacilityMember
/ us-gaap_DebtInstrumentAxis
= us-gaap_BaseRateMember		                
Subsequent event | Eagle Ottawa | 5.25% Senior Notes due 2025                      
Debt Instrument [Line Items]                      
Proceeds from issuance of debt                   350,000,000us-gaap_ProceedsFromIssuanceOfDebt
/ us-gaap_BusinessAcquisitionAxis
= lea_EagleOttawaMember
/ us-gaap_DebtInstrumentAxis
= lea_SeniorNotesDueTwoThousandTwentyFiveMember
/ us-gaap_SubsequentEventTypeAxis
= us-gaap_SubsequentEventMember		  
Subsequent event | Eagle Ottawa | Term Loan Facility                      
Debt Instrument [Line Items]                      
Proceeds from issuance of debt                   $ 500,000,000us-gaap_ProceedsFromIssuanceOfDebt
/ us-gaap_BusinessAcquisitionAxis
= lea_EagleOttawaMember
/ us-gaap_DebtInstrumentAxis
= lea_TermLoanFacilityMember
/ us-gaap_SubsequentEventTypeAxis
= us-gaap_SubsequentEventMember