Income Taxes - Reconciliation of Provision for Income Tax Expense (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Income Tax Disclosure [Abstract]
Tax at U.S. statutory income tax rate	$ 174	$ 136	$ 120
Tax credits	(15)	(9)	(4)
State tax expense (excluding tax rate changes)	13	12	12
Non-deductible expenses	(13)	2	0
Effect of tax rate changes	(4)	(15)	2
Valuation allowance	2	(6)	(1)
Other adjustments	(3)	(6)	1
Total income tax expense	$ 154	$ 114	$ 130