Consolidated Statements of Comprehensive Income - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Net Income	$ 3,569	$ 4,248	$ 3,869
Other comprehensive income:
Change in Pension and Retiree Health and Welfare benefits, net of tax expense of $45 million, tax expense of $31 million and tax benefit of $156 million, respectively	72	50	(251)
Change in accumulated other comprehensive income (loss) of equity method investees	(1)	0	4
Other comprehensive income (loss), net of tax	71	50	(247)
Total comprehensive income	$ 3,640	$ 4,298	$ 3,622