Consolidated Statements of Comprehensive Income (Loss) - USD ($) $ in Millions		12 Months Ended
		Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Statement of Comprehensive Income [Abstract]
Net income (loss)		$ 13,304	$ 2,322	$ (14,831)
Other comprehensive income (loss) items:
Gains on derivatives	[1]	80	14	4
Pension and postretirement gains (losses)	[2]	321	67	(71)
Other		2	(1)	0
Other comprehensive income (loss), net of tax		403	80	(67)
Comprehensive income (loss) attributable to preferred and common stockholders		$ 13,707	$ 2,402	$ (14,898)

[1] Net of tax expense of $(22), $(4) and $(1) in 2022, 2021 and 2020, respectively.

[2] Net of tax benefit (expense) of $(99), $(18) and $24 in 2022, 2021 and 2020, respectively. See Note 11 - Retirement and Postretirement Benefit Plans in the Notes to Consolidated Financial Statements in Part II Item 8 of this Form 10-K for additional information.