Consolidated Statements of Comprehensive Income - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2016	Mar. 31, 2015
Net income	$ 784	$ 1,045
Other comprehensive income:
Change in accumulated other comprehensive income of equity method investees	(2)	(1)
Other Comprehensive (Loss) Income, Net of Tax	(2)	(1)
Total comprehensive income	$ 782	$ 1,044