Consolidated Statements of Comprehensive Income - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2018	Sep. 30, 2017	Sep. 30, 2018	Sep. 30, 2017
Net income	$ 1,393	$ 1,042	$ 3,847	$ 2,838
Other Comprehensive Income:
Change in pension and retiree health and welfare benefits, net of tax	(1)	0	(1)	(1)
Change in accumulated other comprehensive income (loss) of equity method investees	0	0	1	(1)
Other comprehensive income (loss), net of tax	(1)	0	0	(2)
Total comprehensive income	$ 1,392	$ 1,042	$ 3,847	$ 2,836