Income Taxes - Breakdown of Income Tax Expense Between Current and Deferred (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Current:
Federal	$ 852	$ 928	$ 827
State	184	203	176
Subtotal Current	1,036	1,131	1,003
Deferred:
Federal	122	166	166
State	18	(49)	1
Subtotal Deferred	140	117	167
Total Income Tax Expense	$ 1,176	$ 1,248	$ 1,170