Annual report pursuant to Section 13 and 15(d)

Securities - Gains and Losses on Sales of AFS Debt Securities (Details)

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Securities - Gains and Losses on Sales of AFS Debt Securities (Details) - USD ($)
$ in Millions
12 Months Ended
Dec. 31, 2021
Dec. 31, 2020
Dec. 31, 2019
Available-for-sale Securities, Gross Realized Gain (Loss) [Abstract]      
Gross gains $ 49 $ 423 $ 336
Gross losses (27) (12) (119)
Net gains on sales of AFS debt securities 22 411 217
Income tax expense attributable to realized net gains on sales of AFS debt securities $ 5 $ 103 $ 54