XML 79 R40.htm IDEA: XBRL DOCUMENT v2.4.0.8
Income per Common Share (Tables)
 12 Months Ended
Dec. 31, 2013
Earnings Per Share [Abstract]  
Summary Of Earnings Per Common Share
(In millions, except per share data)
2013
 
2012
 
2011
Basic earnings per share:
 
 
 
 
 
Allocation of earnings:
 
 
 
 
 
Net income attributable to MPC
$
2,112

 
$
3,389

 
$
2,389

Income allocated to participating securities
4

 
6

 
4

Income available to common stockholders - basic
$
2,108

 
$
3,383

 
$
2,385

Weighted average common shares outstanding
315

 
340

 
356

Basic earnings per share
$
6.69

 
$
9.95

 
$
6.70

Diluted earnings per share:
 
 
 
 
 
Allocation of earnings:
 
 
 
 
 
Net income attributable to MPC
$
2,112

 
$
3,389

 
$
2,389

Income allocated to participating securities
4

 
6

 
4

Income available to common stockholders - diluted
$
2,108

 
$
3,383

 
$
2,385

Weighted average common shares outstanding
315

 
340

 
356

Effect of dilutive securities
2

 
2

 
1

Weighted average common shares, including dilutive effect
317

 
342

 
357

Diluted earnings per share
$
6.64

 
$
9.89

 
$
6.67