Leases (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023
Leases [Abstract]
Lessee, Operating Lease, Liability, Payments, Remainder of Fiscal Year	$ 9
Operating Lease, Weighted Average Discount Rate, Percent	3.00%
Operating Lease, Cost	$ 8	$ 10
Operating lease assets	25	25
Leases of Lessee Disclosure [Text Block]	25	25
Operating Lease, Liability, Current	8	6
Non-current operating lease liabilities	24	25
Total lease liabilities	32	32
Operating Lease, Payments	7	10
Right-of-Use Asset Obtained in Exchange for Operating Lease Liability	$ 7	4
Operating Lease, Weighted Average Remaining Lease Term	5 years
Lessee, Operating Lease, Liability, Payments, Due Year Two	$ 8
Lessee, Operating Lease, Liability, Payments, Due Year Three	5
Lessee, Operating Lease, Liability, Payments, Due Year Four	4
Lessee, Operating Lease, Liability, Payments, Due Year Five	3
Lessee, Operating Lease, Liability, Payments, Due after Year Five	7
Lessee, Operating Lease, Liability, Payments, Due	35
Lessee, Operating Lease, Liability, Undiscounted Excess Amount	(3)
Operating Lease, Liability	32
Operating Lease, Expense	$ 5	4
Operating Lease, Impairment Loss		$ 3