Income Taxes Uncertain tax positions (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Significant Change in Unrecognized Tax Benefits is Reasonably Possible [Line Items]
Unrecognized Tax Benefits	$ 11	$ 13	$ 6	$ 9
Tax positions taken in current year	1	1	1
Tax positions taken in prior years	0	6	0
Unrecognized Tax Benefits, Reduction Resulting from Lapse of Applicable Statute of Limitations	0	0	4
Unrecognized Tax Benefits that Would Impact Effective Tax Rate	11
Unrecognized Tax Benefits, Income Tax Penalties and Interest Accrued	0	2
Unrecognized Tax Benefits, Income Tax Penalties and Interest Paid	0	0
Settlements during the year	$ (3)	$ 0	$ 0