Condensed Consolidated Statements of Comprehensive Income (Unaudited) (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 income	$ 1,205	$ 708	$ 2,596	$ 1,340
Other comprehensive income (loss), net of income taxes:
Defined benefit and other postretirement plan adjustments	(2)	2	3	8
Other	(2)	0	(3)	1
Other comprehensive income (loss), net of income taxes	(4)	2	0	9
Comprehensive income (loss)	1,201	710	2,596	1,349
Comprehensive (income) loss attributable to noncontrolling interest	(2)	(2)	3	(8)
Comprehensive income (loss) attributable to company shareholders	$ 1,199	$ 708	$ 2,599	$ 1,341