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CONSOLIDATED BALANCE SHEETS (Parenthetical) - USD ($)
$ in Millions
Mar. 31, 2024
Dec. 31, 2023
Debt Securities held to maturity, estimated fair value $ 701 $ 716
Debt Securities, Available-for-sale, Amortized Cost $ 30,909 $ 30,864
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 1,403,500
Common Stock, Shares Authorized 3,000,000,000 3,000,000,000
Common Stock, Par or Stated Value Per Share $ 0.01 $ 0.01
Common Stock, Shares, Issued 958,004,085 963,375,681
Treasury Stock, Common, Shares 41,032,676 41,032,676
Recurring Fair Value Measurements [Member]    
Loans held for sale $ 259 $ 201