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Deposits - Composition of Deposits (Detail) - USD ($)
$ in Millions
Dec. 31, 2019
Dec. 31, 2018
Banking and Thrift [Abstract]    
Noninterest-bearing deposits $ 75,590 $ 81,811
Interest-bearing deposits    
Interest checking 75,949 73,994
Money market savings 120,082 100,396
Savings accounts 47,401 44,720
Time deposits 42,894 44,554
Total interest-bearing deposits [1] 286,326 263,664
Total deposits $ 361,916 $ 345,475
[1] lncludes time deposits greater than $250,000 balances of $7.8 billion and $15.3 billion at December 31, 2019 and 2018, respectively.