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
Statement of Income and Comprehensive Income
Net income	$ 23	$ 58	$ 4	$ 134
Other comprehensive income (loss), net of tax:
Change in fair value of commodity hedges	0	0	0	(3)
Actuarial gain (loss) relating to postretirement benefits	0	8	(1)	10
Total other comprehensive income, net of tax	0	8	(1)	7
Comprehensive income	$ 23	$ 66	$ 3	$ 141