Consolidated Statements of Comprehensive Income (USD $) In Millions, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 30, 2014	Sep. 30, 2013	Sep. 30, 2014	Sep. 30, 2013
Net of tax	$ 1,035	$ 989	$ 2,675	$ 2,671
Other comprehensive income:
Change in amortization of accumulated actuarial losses and prior service credits, net of tax benefit of $0 million, $2 million, $0 million and $6 million, respectively	(1)	4	(1)	10
Change in accumulated other comprehensive income of equity method investees	1	(1)	4	(2)
Other Comprehensive Income (Loss), Net of Tax	0	3	3	8
Total comprehensive income	$ 1,035	$ 992	$ 2,678	$ 2,679