Income Taxes - Schedule of Reconciliation of Income Tax Expense (Benefit) Computed by Applying Statutory Federal Income Tax Rate (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Amount
Computed “expected” federal income tax	$ 447	$ 1,085	$ 315
State income tax, net of federal income tax benefit	29	93	24
Deferred tax adjustment related to change in overall state tax rate	16	(23)	(7)
Valuation allowance	3	(66)	3
Excess executive compensation	11	10	15
Reserve on uncertain tax positions	6	6	1
Uncertain tax positions	(14)	(34)	(6)
Other, net	5	33	(1)
Income tax expense	$ 503	$ 1,104	$ 344
Rate
Computed “expected” federal income tax	21.00%	21.00%	21.00%
State income tax, net of federal income tax benefit	1.35%	1.80%	1.59%
Deferred tax adjustment related to change in overall state tax rate	0.73%	(0.45%)	(0.46%)
Valuation allowance	0.13%	(1.28%)	0.22%
Excess executive compensation	0.50%	0.20%	1.03%
Reserve on uncertain tax positions	0.31%	0.12%	0.05%
Uncertain tax positions	(0.65%)	(0.66%)	(0.39%)
Other, net	0.27%	0.62%	(0.14%)
Income tax expense	23.64%	21.35%	22.90%