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Unaudited Quarterly Operating Results (Tables)
 12 Months Ended
Dec. 31, 2014
Unaudited Quarterly Operating Results [Abstract]  
Unaudited quarterly operating results
Unaudited quarterly operating results were as follows:

  
2014 (quarter ended)
 
(dollars in millions, except per share data)
 
March 31,
  
June 30,
  
September 30,
  
December 31,
 
         
Revenues
 
$
2,329
  
$
2,570
  
$
2,678
  
$
2,804
 
Revenues less cost of sales (exclusive of depreciation and  amortization)
 
$
639
  
$
720
  
$
763
  
$
795
 
Other costs (credits)
 
$
49
  
$
(6
)
 
$
19
  
$
11
 
Net income
 
$
115
  
$
233
  
$
238
  
$
262
 
Net income attributable to noncontrolling interests
 
$
4
  
$
12
  
$
13
  
$
8
 
Net income attributable to Cameron stockholders
 
$
111
  
$
221
  
$
225
  
$
254
 
                 
Earnings per share attributable to Cameron stockholders:
                
Basic
 
$
0.51
  
$
1.08
  
$
1.12
  
$
1.30
 
Diluted
 
$
0.51
  
$
1.08
  
$
1.11
  
$
1.28
 

  
2013 (quarter ended)
 
(dollars in millions, except per share data)
 
March 31,
  
June 30,
  
September 30,
  
December 31,
 
         
Revenues
 
$
1,956
  
$
2,134
  
$
2,317
  
$
2,731
 
Revenues less cost of sales (exclusive of depreciation and  amortization)
 
$
574
  
$
620
  
$
668
  
$
758
 
Other costs (credits)
 
$
31
  
$
36
  
$
14
  
$
11
 
Net income
 
$
149
  
$
140
  
$
192
  
$
243
 
Net income attributable to noncontrolling interests
 
$
–
  
$
–
  
$
3
  
$
22
 
Net income attributable to Cameron stockholders
 
$
149
  
$
140
  
$
189
  
$
221
 
                 
Earnings per share attributable to Cameron stockholders:
                
Basic
 
$
0.60
  
$
0.57
  
$
0.78
  
$
0.96
 
Diluted
 
$
0.60
  
$
0.57
  
$
0.78
  
$
0.94