v3.20.4
Deposits - Types and Sources of the Firm's Deposits (Parenthetical) (Detail)
$ in Millions
12 Months Ended
Dec. 31, 2020
USD ($)
Arrangements
Dec. 31, 2019
USD ($)
Deposits [Abstract]    
Deposits at fair value $ 16,176 $ 17,765
Weighted average maturity of time deposits 1 year 3 months 18 days 1 year 8 months 12 days
Number of deposit sweep program contractual arrangements | Arrangements 12  
Deposits insured by the FDIC $ 123,030 $ 103,980
Deposits insured by non-U.S. Insurance Programs $ 27,520 $ 15,860