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Earnings Per Share (Tables)
 3 Months Ended
Mar. 31, 2016
Earnings Per Share [Abstract]  
Schedule of Earnings Per Share Reconciliation
 
Three Months Ended
March 31,
(in millions, except per share amounts)
2016
 
2015
Basic earnings per share:
 
 
 
Net earnings attributable to BorgWarner Inc.
$
164.1

 
$
178.9

Weighted average shares of common stock outstanding
217.388

 
225.796

Basic earnings per share of common stock
$
0.75

 
$
0.79

 
 
 
 
Diluted earnings per share:
 
 
 
Net earnings attributable to BorgWarner Inc.
$
164.1

 
$
178.9

 
 
 
 
Weighted average shares of common stock outstanding
217.388


225.796

Effect of stock-based compensation
0.749

 
1.292

Weighted average shares of common stock outstanding including dilutive shares
218.137


227.088

Diluted earnings per share of common stock
$
0.75


$
0.79