Consolidated Statements of Comprehensive Income - USD ($) $ in Millions		12 Months Ended
		Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Statement of Comprehensive Income [Abstract]
Net income		$ 4,696	$ 13,304	$ 2,322
Other comprehensive income items:
Gains on derivatives	[1]	44	80	14
Pension and postretirement gains	[2]	34	321	67
Other		2	2	(1)
Other comprehensive income, net of tax		80	403	80
Comprehensive income attributable to preferred and common stockholders		$ 4,776	$ 13,707	$ 2,402

[1] Net of tax expense of zero, $(22) and $(4) in 2023, 2022 and 2021, respectively.

[2] Net of tax expense of $(10), $(99) and $(18) in 2023, 2022 and 2021, 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.