XML 66 R54.htm IDEA: XBRL DOCUMENT v3.4.0.3
Net Income Per Share Attributable to Lear (Detail) - USD ($)
$ / shares in Units, $ in Millions
 3 Months Ended
Apr. 02, 2016
Mar. 28, 2015
Earnings Per Share [Abstract]    
Net income attributable to Lear $ 248.4 $ 147.3
Average common shares outstanding (in shares) 74,689,475 78,250,590
Dilutive effect of common stock equivalents (in shares) 784,864 829,008
Average diluted shares outstanding (in shares) 75,474,339 79,079,598
Basic net income per share attributable to Lear (in dollars per share) $ 3.33 $ 1.88
Diluted net income per share attributable to Lear (in dollars per share) $ 3.29 $ 1.86