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Consolidated Statements Of Comprehensive Income - USD ($)
$ in Millions
3 Months Ended 9 Months Ended
Sep. 30, 2015
Sep. 30, 2014
Sep. 30, 2015
Sep. 30, 2014
Statement of Comprehensive Income [Abstract]        
Net income $ 238 $ 470 $ 1,231 $ 1,418
Other comprehensive income (loss), net of tax:        
Reclassification to earnings of gains and losses on derivative instruments accounted for as cash flow hedges 0 0 0 6
Change in value of derivative instruments accounted for as cash flow hedges 0 3 1 (3)
Change in value of available-for-sale securities (1) 1 (1) 1
Actuarial gain (loss) relating to pension and other postretirement benefit plans 0 (1) 45 (2)
Foreign currency translation adjustments 1 (1) (1) (3)
Change in other comprehensive income from unconsolidated affiliates 0 0 (2) (6)
Other comprehensive income (loss), net of tax 0 2 42 (7)
Comprehensive income 238 472 1,273 1,411
Less: Comprehensive income (loss) attributable to noncontrolling interest (57) 285 393 895
Comprehensive income attributable to partners $ 295 $ 187 $ 880 $ 516