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CONSOLIDATED STATEMENT OF COMPREHENSIVE INCOME (USD $)
In Millions, unless otherwise specified
3 Months Ended 6 Months Ended
Jun. 30, 2013
Jun. 30, 2012
Jun. 30, 2013
Jun. 30, 2012
CONSOLIDATED STATEMENT OF COMPREHENSIVE INCOME        
Net income $ 23 $ 33 $ 52 $ 72
Total comprehensive income $ 23 $ 33 $ 52 $ 72