Income Taxes - Deferred Taxes Included in Consolidated Balance Sheets (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023
Income Taxes.
Other assets	$ 79	$ 107
Deferred taxes	(74)	(86)
Net deferred taxes	5	$ 21
Deferred tax benefit associated with reduction in valuation allowance	6
Deferred tax benefit associated with reduction in valuation allowance allocated to income from continuing operations	21
Deferred tax benefit associated with reduction in valuation allowance allocated to other comprehensive income	$ 15