Background and Business Description - Settlement of RMBS Litigation - USD ($) $ in Millions	3 Months Ended		12 Months Ended
	Dec. 31, 2022	Sep. 30, 2021	Dec. 31, 2022	Dec. 31, 2021
Gain (Loss) Related to Litigation Settlement			$ 126	$ 0
Loss Reserves [Member]
Gain (Loss) Related to Litigation Settlement	$ 43	$ 319	362
Litigation Recoveries
Gain (Loss) Related to Litigation Settlement	126		126
Gain (loss) on extinguishment of debt
Gain (Loss) Related to Litigation Settlement	(53)		(53)
Gain (Loss) on Investments [Member]
Gain (Loss) Related to Litigation Settlement	5		5
R&W value
Loss and Loss Benjefit Relating to R&W Recoveries			123
Bank of America
Proceeds from Legal Settlements			1,840
Gain (Loss) Related to Litigation Settlement	$ 121	$ 319	440
Nomura Credit & Capital, Inc.
Proceeds from Legal Settlements			$ 140