CONSOLIDATED CONDENSED STATEMENTS OF COMPREHENSIVE INCOME - USD ($) $ in Millions		3 Months Ended		6 Months Ended
		Jun. 30, 2018	Jun. 30, 2017	Jun. 30, 2018	Jun. 30, 2017
CONSOLIDATED CONDENSED STATEMENTS OF COMPREHENSIVE INCOME
Net income		$ 848	$ 507	$ 1,556	$ 624
Other comprehensive income (loss) items:
Foreign currency translation (losses) gains		(1)			1
Unrealized gains (losses) on derivatives	[1]	(1)	1	(4)	6
Pension and postretirement gains (losses)	[2]	5	(1)	9	8
Reclassification of realized (gains) losses on derivatives	[3]	1	1	3	(1)
Other comprehensive income, net of tax		4	1	8	14
Comprehensive income		$ 852	$ 508	$ 1,564	$ 638

[1] Net of tax of zero for the three months ended June 30, 2018, and 2017, and $1 and $(3) for the six months ended June 30, 2018, and 2017, respectively.

[2] Net of tax of $(2) and $1 for the three months ended June 30, 2018, and 2017, respectively, and $(3) and $(4) for the six months ended June 30, 2018, and 2017, respectively.

[3] Net of tax of zero for each of the three months ended June 30, 2018, and 2017, and $(1) and $1 for the six months ended June 30, 2018, and 2017, respectively.