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Consolidated Statements of Equity (Parenthetical) (USD $) | 12 Months Ended
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Dec. 31, 2014 | Dec. 31, 2013 | Dec. 31, 2012
Statement of Stockholders' Equity [Abstract] |  |  |
Issuance of common stock related to exercises of warrants, shares | 205,526 us-gaap_StockIssuedDuringPeriodSharesOther | 195,974 us-gaap_StockIssuedDuringPeriodSharesOther | 38,017 us-gaap_StockIssuedDuringPeriodSharesOther
Stock Issued During Period, Shares, Share-based Compensation, Net of Forfeitures | 868,746 us-gaap_StockIssuedDuringPeriodSharesShareBasedCompensation | 207,468 us-gaap_StockIssuedDuringPeriodSharesShareBasedCompensation | 541,890 us-gaap_StockIssuedDuringPeriodSharesShareBasedCompensation
Issuance of common stock related to share based compensation, per shares | $ 50.19 lea_StockIssuedDuringPeriodFromTreasuryStockValueShareBasedCompensationPerShare | $ 45.11 lea_StockIssuedDuringPeriodFromTreasuryStockValueShareBasedCompensationPerShare | $ 43.46 lea_StockIssuedDuringPeriodFromTreasuryStockValueShareBasedCompensationPerShare
Common stock, shares repurchase | 3,805,114 us-gaap_TreasuryStockSharesAcquired | 15,533,758 us-gaap_TreasuryStockSharesAcquired | 5,357,443 us-gaap_TreasuryStockSharesAcquired
Common stock, shares repurchase price per share | $ 93.52 us-gaap_TreasuryStockAcquiredAverageCostPerShare | $ 54.08 us-gaap_TreasuryStockAcquiredAverageCostPerShare | $ 41.59 us-gaap_TreasuryStockAcquiredAverageCostPerShare
Treasury stock, shares retired | 8,000,000 us-gaap_TreasuryStockSharesRetired | 20,000,000 us-gaap_TreasuryStockSharesRetired |
Treasury stock, shares retired price per share | $ 64.98 lea_TreasuryStockRetiredAverageCostPerShare | $ 49.53 lea_TreasuryStockRetiredAverageCostPerShare |

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- Definition Number of shares of stock issued during the period that is attributable to transactions involving issuance of stock not separately disclosed. + References No definition available. + Details
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- Definition Number of shares (or other type of equity) issued during the period as a result of any equity-based compensation plan other than an employee stock ownership plan (ESOP), net of any shares forfeited. Shares issued could result from the issuance of restricted stock, the exercise of stock options, stock issued under employee stock purchase plans, and/or other employee benefit plans. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 04 -Article 3 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 10 -Section 50 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=6928386&loc=d3e21463-112644 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.3-04) -URI http://asc.fasb.org/extlink&oid=27012166&loc=d3e187085-122770 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 02 -Paragraph 29, 30 -Article 5 + Details
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- Definition Total cost of shares repurchased divided by the total number of shares repurchased. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 30 -Section 45 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6405813&loc=d3e23239-112655 + Details
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