Consolidated Statements of Comprehensive Income - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2019	Jun. 30, 2018	Jun. 30, 2019	Jun. 30, 2018
Net income	$ 1,338	$ 1,309	$ 2,591	$ 2,454
Other Comprehensive Income:
Change in pension and retiree health and welfare benefits, net of tax	0	0	63	0
Change in accumulated other comprehensive income (loss) of equity method investees	0	0	(1)	1
Other comprehensive income (loss), net of tax	0	0	62	1
Total comprehensive income	$ 1,338	$ 1,309	$ 2,653	$ 2,455