CONSOLIDATED CONDENSED STATEMENTS OF COMPREHENSIVE INCOME (LOSS) - USD ($) $ in Millions		3 Months Ended		9 Months Ended
		Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019
Statement of Comprehensive Income [Abstract]
Net Income (Loss), Including Portion Attributable to Noncontrolling Interest		$ (3,575)	$ (752)	$ (13,719)	$ 514
Other comprehensive income (loss) items:
Foreign currency translation losses		0	0	(1)	0
Losses on derivatives	[1]	(1)	(114)	(3)	(130)
Pension and postretirement (losses) gains	[2]	28	(34)	(63)	(30)
Reclassification of losses on derivatives	[3]	2	0	5	0
Other comprehensive income (loss), net of tax		29	(148)	(62)	(160)
Comprehensive income (loss)		(3,546)	(900)	(13,781)	354
Comprehensive income (loss) attributable to noncontrolling interest		0	(42)	0	(42)
Comprehensive income (loss) attributable to preferred and common stockholders		$ (3,546)	$ (942)	$ (13,781)	$ 312

[1] Net of tax of zero and $32 million for the three months ended September 30, 2020 and 2019, and $1 million and $36 million for the nine months ended September 30, 2020 and 2019, respectively.

[2] Net of tax of $(8) million and $10 million for the three months ended September 30, 2020 and 2019, respectively, and $18 million and $8 million for the nine months ended September 30, 2020 and 2019, respectively.

[3] Net of tax of zero for each of the three months ended September 30, 2020 and 2019, respectively, and $(1) million and zero for the nine months ended September 30, 2020 and 2019, respectively.