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Quarterly Results (unaudited)
12 Months Ended
Dec. 31, 2011
Quarterly Results (unaudited)  
Quarterly Results (unaudited)

17.  Quarterly Results (unaudited)

 

($ in millions)

 

First Quarter

 

Second Quarter

 

Third Quarter

 

Fourth Quarter

 

 

 

2011

 

2010

 

2011

 

2010

 

2011

 

2010

 

2011

 

2010

 

Revenues

$

1,125

$

945

$

1,141

$

750

$

1,279

$

1,046

$

1,114

$

1,089

 

Net income (loss)

 

87

 

(18)

 

137

 

(127)

 

150

 

60

 

86

 

57