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CONSOLIDATED BALANCE SHEETS (Parenthetical) - USD ($)
$ in Millions
Dec. 31, 2022
Dec. 31, 2021
Debt Securities held to maturity, estimated fair value $ 751 $ 950
Debt Securities, Available-for-sale, Amortized Cost $ 31,367 $ 28,263
Preferred stock, shares authorized 10,000,000 10,000,000
Preferred Stock, Par or Stated Value Per Share $ 1.00 $ 1.00
Preferred stock, shares issued 1,403,500  
Common Stock, Shares Authorized 3,000,000,000  
Common Stock, Par or Stated Value Per Share $ 0.01  
Common Stock, Shares, Issued 975,524,168 982,940,601
Treasury Stock, Shares 41,032,676 41,032,676
Noncumulative Preferred Stock [Member]    
Preferred stock, shares issued 1,403,500 1,403,500