Consolidated Statements of Comprehensive Income - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2016	Sep. 30, 2015	Sep. 30, 2016	Sep. 30, 2015
Net income	$ 1,020	$ 1,156	$ 2,576	$ 3,164
Other comprehensive income:
Change in Pension and Retiree Health and Welfare benefits, net of tax expense of $1 million in each of the three and six months ended June 30, 2016 and net of tax benefit of $1 million in each of the three and six months ended June 30, 2015	(1)	0	(1)	0
Change in accumulated other comprehensive income (loss) of equity method investees	0	0	(1)	(1)
Other Comprehensive (Loss) Income, Net of Tax	(1)	0	(2)	(1)
Total comprehensive income	$ 1,019	$ 1,156	$ 2,574	$ 3,163