Common Stock, Number Of Votes For Each Outstanding Share Of Common Stock

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- Definition

Excess Shares Delivered Under ASR

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- Definition

Stockholders Equity Note [Line Items]

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- Definition

Treasury stock percentage acquired.

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No definition available.

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- Definition

Final price paid per share for the purchase of the targeted number of shares, determined by an average market price over a fixed period of time.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 505
-SubTopic 30
-Section 25
-Paragraph 5
-URI http://asc.fasb.org/extlink&oid=6405686&loc=d3e22802-112653

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- Definition

The price paid per share to immediately purchase the targeted number of shares on the date of executing the accelerated share repurchase agreement.

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- Definition

Amount of cash receipt from (payment to) bank; or stock received from (issuance to) bank in the settlement of the accelerated share repurchase agreement.

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- Definition

Aggregate dividends declared during the period for each share of common stock outstanding.

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-Publisher FASB
-Name Accounting Standards Codification
-Topic 505
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.3-04)
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- Definition

The maximum number of common shares permitted to be issued by an entity's charter and bylaws.

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Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
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-Name Regulation S-X (SX)
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-Section 02
-Paragraph 30
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- Definition

Amount of paid and unpaid common stock dividends declared with the form of settlement in cash.

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- Definition

The cash outflow to reacquire common stock during the period.

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-Publisher FASB
-Name Accounting Standards Codification
-Topic 230
-SubTopic 10
-Section 45
-Paragraph 15
-Subparagraph (a)
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-Glossary Financing Activities
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- Definition

Amount of cash outflow in the form of ordinary dividends to common shareholders of the parent entity.

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- Definition

Amount of stock repurchase plan authorized.

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No definition available.

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- Definition

Amount remaining of a stock repurchase plan authorized.

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No definition available.

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- Definition

Total cost of shares repurchased divided by the total number of shares repurchased.

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-Publisher FASB
-Name Accounting Standards Codification
-Topic 505
-SubTopic 30
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- Definition

Amount of decrease of par value, additional paid in capital (APIC) and retained earnings of common and preferred stock retired from treasury when treasury stock is accounted for under the cost method.

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-Name Accounting Standards Codification
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-Name Regulation S-X (SX)
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-Section 04
-Article 3

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- Definition

Number of shares that have been repurchased during the period and are being held in treasury.

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- Definition

Number of shares of common and preferred stock retired from treasury during the period.

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Capital Stock and Equity - Additional Information (Detail)	3 Months Ended												12 Months Ended			60 Months Ended
	Sep. 26, 2015 $ / shares	Jun. 27, 2015 $ / shares	Mar. 28, 2015 $ / shares	Dec. 31, 2014 $ / shares shares	Sep. 27, 2014 $ / shares	Jun. 28, 2014 USD ($) $ / shares	Mar. 29, 2014 $ / shares	Dec. 31, 2013 $ / shares	Sep. 28, 2013 $ / shares	Jun. 29, 2013 USD ($) $ / shares shares	Mar. 30, 2013 $ / shares	Dec. 31, 2012 $ / shares	Dec. 31, 2015 USD ($) Vote $ / shares shares	Dec. 31, 2014 USD ($) $ / shares shares	Dec. 31, 2013 USD ($) $ / shares shares	Dec. 31, 2015 USD ($) Vote $ / shares shares	Mar. 31, 2014 shares	Apr. 25, 2013 USD ($)
Stockholders Equity Note [Line Items]
Common stock, shares authorized (in shares) \| shares				300,000,000									300,000,000	300,000,000		300,000,000
Common stock holders voting right, vote per outstanding share \| Vote													1			1
Common stock, aggregate authorized repurchase amount													$ 2,900,000,000.0			$ 2,900,000,000.0
Repurchase of common stock													$ 487,400,000	$ 411,400,000	$ 1,000,100,000	$ 2,400,000,000
Repurchase of common stock, average price (in dollars per share) \| $ / shares													$ 111.62	$ 93.52	$ 54.08	$ 68.12
Repurchase of common stock (in shares) \| shares													4,366,365	3,805,114	15,533,758
Percentage of treasury stock repurchased															80.00%
Remaining repurchase authorization													$ 512,600,000			$ 512,600,000
Retirement of shares held in treasury (in shares) \| shares														8,000,000	20,000,000
Increase (reduction) in shares held in treasury														$ 0	$ 0
Cash dividends declared (in dollars per share) \| $ / shares	$ 0.25	$ 0.25	$ 0.25	$ 0.25	$ 0.20	$ 0.20	$ 0.20	$ 0.20	$ 0.17	$ 0.17	$ 0.17	$ 0.17
Dividends declared to Lear Corporation stockholders													79,400,000	67,100,000	59,400,000
Dividends paid to Lear Corporation stockholders													78,500,000	65,300,000	58,400,000
Common stock
Stockholders Equity Note [Line Items]
Increase (reduction) in shares held in treasury														100,000	200,000
Additional paid-in capital
Stockholders Equity Note [Line Items]
Increase (reduction) in shares held in treasury														155,900,000	389,700,000
Retained earnings
Stockholders Equity Note [Line Items]
Increase (reduction) in shares held in treasury														363,900,000	600,700,000
Dividends declared to Lear Corporation stockholders													79,400,000	67,100,000	59,400,000
Treasury stock
Stockholders Equity Note [Line Items]
Increase (reduction) in shares held in treasury														(519,900,000)	$ (990,600,000)
Open market repurchases
Stockholders Equity Note [Line Items]
Repurchase of common stock														355,900,000
ASR agreement
Stockholders Equity Note [Line Items]
Common stock, aggregate authorized repurchase amount																		$ 800,000,000
Repurchase of common stock														$ 55,500,000
Amount paid in accelerated stock repurchase agreement						$ 55,500,000				$ 800,000,000			$ 855,500,000			$ 855,500,000
Repurchase of common stock (in shares) \| shares										11,862,836
Percentage of treasury stock repurchased										80.00%
Value of common stock repurchased (in dollars per share) \| $ / shares										$ 53.95
Excess shares delivered under ASR (in shares) \| shares																	658,903
Final price paid per share (in dollars per share) \| $ / shares													$ 72.11