XML 21 R136.htm IDEA: XBRL DOCUMENT v3.19.3.a.u2
Accumulated Other Comprehensive Loss - Additional Information (Details) - USD ($)
$ in Millions
12 Months Ended
Dec. 31, 2019
Dec. 31, 2018
Dec. 31, 2017
Accumulated Other Comprehensive Income (Loss) [Line Items]      
Tax (benefit) expense included in net unrealized gains (losses), investment securities $ 145 $ (68) $ 136
Tax included in reclassification, investment securities (21) (6) (19)
Tax included in amortization, investment securities 4 4 10
Tax (benefit) expense included in net unrealized gains (losses), fair value option liabilities (68) 103 (115)
Tax (benefit) expense included in reclassification adjustment for a gain realized in net income (loss) (30) 0 0
Tax (benefit) expense included in net unrealized gains (losses), cash flow hedges (5)    
Tax (benefit) expense included in net unrealized gains (losses), cash flow hedges (less than $1 million)   7 (11)
Tax included in reclassification, cash flow hedges 8    
Tax included in reclassification, cash flow hedges   5 6
Tax included in net unrealized gains (losses), pension and postretirement benefit liability (5) 3 1
Unrealized Gains (Losses) on Investment Securities [Member] | Accounting Standards Update 2016-01, Equity Investments Previously Classified as Available-for-sale [Member]      
Accumulated Other Comprehensive Income (Loss) [Line Items]      
Cumulative effect of new accounting principle in period of adoption, tax 0 2 0
Unrealized Gains (Losses) on Fair Value Option Liabilities Attributable to Our Own Credit Spread [Member] | Accounting Standards Update 2016-01, Fair Value Option [Member]      
Accumulated Other Comprehensive Income (Loss) [Line Items]      
Cumulative effect of new accounting principle in period of adoption, tax $ 0 $ 0 $ 103