Consolidated and Combined Statements of Comprehensive Income (USD $) In Millions, unless otherwise specified	12 Months Ended
	Dec. 31, 2014		Dec. 31, 2013		Dec. 31, 2012
Consolidated and Combined Statements of Comprehensive Income
Net income / (loss)	$ (1,434)		$ 869		$ 699
Other comprehensive income (loss) items:
Unrealized (losses) gains on derivatives	(2)	[1]	(2)	[1]	3	[1]
Pension and postretirement (losses) gains	(1)	[2]	27	[2]	2	[2]
Reclassification to income of realized losses (gains) on derivatives	3	[3]	(2)	[3]
Other comprehensive income, net of tax			23		5
Comprehensive income / (loss)	$ (1,434)		$ 892		$ 704

[1] Net of tax of $1, $1 and $(1) in 2014, 2013, and 2012, respectively.

[2] Net of tax of $(1), $(16) and $(1) in 2014, 2013 and 2012, respectively. See Note 14, Retirement and Postretirement Benefit Plans, for additional information.

[3] Net of tax of $(2), $1 and zero in 2014, 2013 and 2012, respectively.