CONSOLIDATED CONDENSED STATEMENTS OF COMPREHENSIVE INCOME - USD ($) $ in Millions		3 Months Ended		6 Months Ended
		Jun. 30, 2019	Jun. 30, 2018	Jun. 30, 2019	Jun. 30, 2018
Statement of Comprehensive Income [Abstract]
Net income		$ 635	$ 848	$ 1,266	$ 1,556
Other comprehensive income (loss) items:
Foreign currency translation losses		0	(1)	0	0
Unrealized gains (losses) on derivatives	[1]	(18)	(1)	(16)	(4)
Pension and postretirement gains (losses)	[2]	2	5	4	9
Reclassification of realized (gains) losses on derivatives	[3]	0	1	0	3
Other comprehensive income (loss), net of tax		(16)	4	(12)	8
Comprehensive income		$ 619	$ 852	$ 1,254	$ 1,564

[1] Net of tax of $5 and zero for the three months ended June 30, 2019, and 2018, and $5 and $1 for the six months ended June 30, 2019, and 2018, respectively.

[2] Net of tax of zero and $(2) for the three months ended June 30, 2019, and 2018, and $(1) and $(3) for the six months ended June 30, 2019, and 2018, respectively.

[3] Net of tax of zero for the three and six months ended June 30, 2019, and zero and $(1) for the three and six months ended June 30, 2018, respectively.