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Cash Flow Information - Summary of Cash Flow Information (Detail) - USD ($)
$ in Millions
12 Months Ended
Dec. 31, 2019
Dec. 31, 2018
Dec. 31, 2017
Statement of Cash Flows [Abstract]      
Interest paid on deposits and other borrowings $ 329 $ 230 $ 129
Income taxes paid 40 19 53
Transfers of loans to other real estate owned 15 12 35
Loans transferred to held for sale from portfolio 389 0 0
Loans transferred to portfolio from held for sale $ 110 $ 0 $ 0