Consolidated Statements of Comprehensive Income (USD $) In Millions, unless otherwise specified	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Net income	$ 2,135	$ 2,645	$ 2,844
Other comprehensive income, net of income taxes:
Defined benefit and other postretirement plans adjustments	0	(33)	(34)
Other	2	(3)	0
Other comprehensive income (loss), net of income taxes	2	(36)	(34)
Comprehensive income	2,137	2,609	2,810
Comprehensive income attributable to noncontrolling interest	(10)	(10)	(4)
Comprehensive income attributable to company shareholders	$ 2,127	$ 2,599	$ 2,806