CONSOLIDATED CONDENSED STATEMENTS OF COMPREHENSIVE INCOME - USD ($) $ in Millions		3 Months Ended
		Mar. 31, 2018	Mar. 31, 2017
CONSOLIDATED CONDENSED STATEMENTS OF COMPREHENSIVE INCOME
Net income		$ 708	$ 117
Other comprehensive income (loss) items:
Foreign currency translation gains		1	1
Unrealized gains (losses) on derivatives	[1]	(3)	5
Pension and postretirement gains	[2]	4	9
Reclassification of realized (gains) losses on derivatives	[3]	2	(2)
Other comprehensive income, net of tax		4	13
Comprehensive income		$ 712	$ 130

[1] Net of tax of $1 and $(3) for the three months ended March 31, 2018, and 2017, respectively.

[2] Net of tax of $(1) and $(5) for the three months ended March 31, 2018, and 2017, respectively.

[3] Net of tax of $(1) and $1 for the three months ended March 31, 2018, and 2017, respectively.