XML 117 R98.htm IDEA: XBRL DOCUMENT
v3.3.1.900

Quarterly Financial Data (unaudited) - Additional Information (Detail) - USD ($) $ in Millions | 1 Months Ended | 3 Months Ended | 12 Months Ended
--- | --- | --- | ---
Mar. 31, 2014 | Dec. 31, 2015 | Sep. 26, 2015 | Jun. 27, 2015 | Mar. 28, 2015 | Dec. 31, 2014 | Sep. 27, 2014 | Jun. 28, 2014 | Mar. 29, 2014 | Dec. 31, 2015 | Dec. 31, 2014 | Dec. 31, 2013
Quarterly Financial Information [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Losses related to redemption of remaining aggregate principal |  |  |  |  |  |  |  |  |  | $ 14.3 | $ 17.9 | $ 3.6
Net tax benefits |  | $ (11.1) | $ (2.2) | $ (15.8) | $ (14.0) | $ (108.9) | $ (6.9) | $ (17.9) | $ (15.4) |  |  |
2018 and 2020 Notes |  |  |  |  |  |  |  |  |  |  |  |
Quarterly Financial Information [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Losses related to redemption of remaining aggregate principal |  |  |  |  |  |  |  |  | $ 17.5 |  | $ 17.5 | $ 3.6
2020 Notes |  |  |  |  |  |  |  |  |  |  |  |
Quarterly Financial Information [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Losses related to redemption of remaining aggregate principal |  |  |  |  | $ 14.3 |  |  |  |  |  |  |
Percentage of debt redemption | 10.00% |  |  |  |  |  |  |  | 10.00% |  |  |

X
- Definition Income Tax Expense (Benefit), Discrete Items + References No definition available. + Details
Name: | lea_IncomeTaxExpenseBenefitDiscreteItems
Namespace Prefix: | lea_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Quarterly Financial Information [Line Items] + References No definition available. + Details
Name: | lea_QuarterlyFinancialInformationLineItems
Namespace Prefix: | lea_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Percentage of principal amount of debt redeemed. + References No definition available. + Details
Name: | us-gaap_DebtInstrumentRedemptionPricePercentageOfPrincipalAmountRedeemed
Namespace Prefix: | us-gaap_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | duration

X
- Definition Difference between the fair value of payments made and the carrying amount of debt which is extinguished prior to maturity. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 470 -SubTopic 50 -Section 40 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=49170532&loc=d3e12317-112629 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 28 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=56944662&loc=d3e3602-108585 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 470 -SubTopic 50 -Section 40 -Paragraph 4 -URI http://asc.fasb.org/extlink&oid=49170532&loc=d3e12355-112629 + Details
Name: | us-gaap_GainsLossesOnExtinguishmentOfDebt
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Details
Name: | us-gaap_DebtInstrumentAxis=lea_SeniorNotesDue2018and2020Member
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_DebtInstrumentAxis=lea_SeniorNotesDueTwoThousandTwentyMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |