Unrealized Tax Benefits (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022	Jan. 01, 2024	Jan. 01, 2023	Jan. 01, 2022
Income Tax Examination [Line Items]
Unrecognized tax benefit — Permanent tax positions	$ 4	$ 3
Unrecognized tax benefit — Temporary tax positions	0	0
Total unrecognized tax benefit	4	3	$ 3			$ 3
Additions for tax positions of prior years	2	0	0
Unrecognized Tax Benefits, Reduction Resulting from Lapse of Applicable Statute of Limitations	(1)	0	0
Tax credit carryforwards	(2)	(2)
Decrease in Unrecognized Tax Benefits is Reasonably Possible	2
Unrecognized Tax Benefits, Income Tax Penalties Expense	0	0	0
Payable for interest related to unrecognized tax benefits	(1)	0	0	$ 0	$ 0	$ 0
Unrecognized Tax Benefits, Interest on Income Taxes Expense	(1)	$ 0	$ 0
Significant Change in Unrecognized Tax Benefits is Reasonably Possible, Amount of Unrecorded Benefit	$ 2