XML 108 R95.htm IDEA: XBRL DOCUMENT v3.20.1
Loans - Summary of Loans (Detail) - USD ($)
$ in Millions
Mar. 31, 2020
Dec. 31, 2019
Dec. 31, 2018
Loans Receivable [Line Items]      
Subtotal $ 131,321 $ 110,345  
Allowance for loan losses (2,868) (1,441) $ (1,066)
Total loans receivable 128,453 108,904  
Subtotal 13,829 14,386  
Amortized cost [Member]      
Loans Receivable [Line Items]      
Subtotal 114,335 90,636  
Allowance for loan losses (2,868) (1,441)  
Total loans receivable 111,467 89,195  
Subtotal 108,637 89,186  
Fair Value [Member]      
Loans Receivable [Line Items]      
Total loans receivable 13,829 14,386  
Subtotal 13,829 14,386  
Held for sale [Member]      
Loans Receivable [Line Items]      
Total loans receivable 3,157 5,323  
Subtotal 3,210 5,409  
Subtotal 3,157 5,323  
Corporate [Member]      
Loans Receivable [Line Items]      
Subtotal 68,530 46,307  
Subtotal 2,915 3,224  
Corporate [Member] | Amortized cost [Member]      
Loans Receivable [Line Items]      
Subtotal 63,697 41,129  
Corporate [Member] | Fair Value [Member]      
Loans Receivable [Line Items]      
Subtotal 2,915 3,224  
Corporate [Member] | Held for sale [Member]      
Loans Receivable [Line Items]      
Subtotal 1,918 1,954  
Wealth management [Member]      
Loans Receivable [Line Items]      
Subtotal 29,017 27,940  
Subtotal 7,834 7,824  
Wealth management [Member] | Amortized cost [Member]      
Loans Receivable [Line Items]      
Subtotal 21,183 20,116  
Wealth management [Member] | Fair Value [Member]      
Loans Receivable [Line Items]      
Subtotal 7,834 7,824  
Commercial real estate [Member]      
Loans Receivable [Line Items]      
Subtotal 16,830 17,743  
Subtotal 2,005 1,876  
Commercial real estate [Member] | Amortized cost [Member]      
Loans Receivable [Line Items]      
Subtotal 14,165 13,258  
Commercial real estate [Member] | Fair Value [Member]      
Loans Receivable [Line Items]      
Subtotal 2,005 1,876  
Commercial real estate [Member] | Held for sale [Member]      
Loans Receivable [Line Items]      
Subtotal 660 2,609  
Residential real estate [Member]      
Loans Receivable [Line Items]      
Subtotal 4,413 6,958  
Subtotal 474 792  
Residential real estate [Member] | Amortized cost [Member]      
Loans Receivable [Line Items]      
Subtotal 3,911 6,132  
Residential real estate [Member] | Fair Value [Member]      
Loans Receivable [Line Items]      
Subtotal 474 792  
Residential real estate [Member] | Held for sale [Member]      
Loans Receivable [Line Items]      
Subtotal 28 34  
Installment [Member]      
Loans Receivable [Line Items]      
Subtotal 4,826 4,747  
Installment [Member] | Amortized cost [Member]      
Loans Receivable [Line Items]      
Subtotal 4,826 4,747  
Credit cards [Member]      
Loans Receivable [Line Items]      
Subtotal 2,081 1,858  
Credit cards [Member] | Amortized cost [Member]      
Loans Receivable [Line Items]      
Subtotal 2,081 1,858  
Other Loans [Member]      
Loans Receivable [Line Items]      
Subtotal 5,624 4,792  
Subtotal 601 670  
Other Loans [Member] | Amortized cost [Member]      
Loans Receivable [Line Items]      
Subtotal 4,472 3,396  
Other Loans [Member] | Fair Value [Member]      
Loans Receivable [Line Items]      
Subtotal 601 670  
Other Loans [Member] | Held for sale [Member]      
Loans Receivable [Line Items]      
Subtotal $ 551 $ 726