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CONSOLIDATED STATEMENT OF COMPREHENSIVE INCOME (USD $)
In Millions, unless otherwise specified
3 Months Ended 9 Months Ended
Sep. 30, 2014
Sep. 30, 2013
Sep. 30, 2014
Sep. 30, 2013
CONSOLIDATED STATEMENT OF COMPREHENSIVE INCOME        
Net income $ 39 $ 46 $ 151 $ 141 [1]
Other comprehensive income        
Change in fair value of cash flow hedges (Note 11)   (1) (1) (1) [1]
Comprehensive income 39 45 150 140 [1]
Comprehensive income attributable to non-controlling interests 8 9 26 27 [1]
Comprehensive income attributable to controlling interests $ 31 $ 36 $ 124 $ 113 [1]
[1] Recast as discussed in Note 2.