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CONSOLIDATED BALANCE SHEETS (Parenthetical) - USD ($) $ in Millions	Jun. 30, 2021	Dec. 31, 2020
Debt securities held to maturity	$ 1,064	$ 1,215
Debt Securities, Available-for-sale, Amortized Cost	28,684	26,092
Loans held for sale	$ 991	$ 1,446
Preferred Stock, Shares Authorized	10,000,000	10,000,000
Preferred Stock, Par Value Per Share (in dollars per share)	$ 1.00	$ 1.00
Common Stock, Shares Authorized	3,000,000,000	3,000,000,000
Common Stock, Par or Stated Value Per Share (in dollars per share)	$ 0.01	$ 0.01
Common Stock, Shares, Issued	995,547,025	1,001,507,052
Treasury Stock, Shares	41,032,676	41,032,676
Noncumulative Preferred Stock [Member]
Preferred Stock, Shares Issued	1,750,000	1,850,000

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Amortized cost of investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale).

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