Income Taxes Income Taxes - Effect of Income Taxes on Net Income and Stockholders' Equity (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Income Tax Expense (Benefit) [Roll Forward]
Income tax expense (benefit)	$ 2	$ 18	$ (3)
Net Unrealized Losses On Securities Tax Effect	(47)	(3)	3
Valuation Allowances And Reserves Charged To Equity	41	1	3
Income Tax Effects Allocated Directly to Equity	(6)	(2)	1
Change in retirement benefits Tax Effect	0	0	0
Credit Risk Changes to Fair Value Options Tax Effect	0	0	0
Income Tax Effects Allocated Directly to Equity, Other	$ (4)	$ 16	$ (1)