Securitization Activities - Additional Information (Detail) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Qualitative and Quantitative Information, Transferor's Continuing Involvement [Line Items]
Assets securitized in a non-cash exchange for loans and investments	$ 792	$ 886	$ 551
Net asset related to other continuing involvement	72	81
Notional amount related to other continuing involvement	1,900	1,810
Fair value of retained interests	5,030	3,570
Other retained interests
Qualitative and Quantitative Information, Transferor's Continuing Involvement [Line Items]
Fair value of retained interests	$ 384	$ 360
Weighted average life (years)	6 years 4 months 24 days	3 years 7 months 6 days
Maximum exposure to adverse changes in the value of other retained interests	$ 398	$ 360