Income Taxes - Income Tax Expense (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Components of Income Tax Benefit (Expense) and Effective Tax Rate Reconciliation:
Federal income taxes	$ (1,304)	$ (1,178)	$ (12)
State income taxes	(369)	(348)	(230)
Current income tax expense	(1,673)	(1,526)	(242)
Federal income taxes	208	(55)	(1,049)
State income taxes	(128)	(32)	223
Deferred income tax benefit (expense)	80	(87)	(826)
Income tax expense	$ (1,593)	(1,613)	(1,068)
Federal income tax rate (percentage)	21.00%
Statutory federal income taxes	$ (1,439)	(1,567)	(1,341)
Statutory state income taxes, net	(174)	(257)	(193)
Change in uncertain tax positions	(158)	(163)	(79)
Nondeductible expenses	(34)	(42)	(27)
Net income attributable to noncontrolling interest	173	195	163
Excess stock compensation	1	59	163
Federal tax credits	75	76	46
Tax rate changes	(129)	47	191
Other	$ 92	$ 39	$ 9