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Fair Value (Schedule of Carrying Values and Estimated Fair Values of Financial Instruments) (Details) - USD ($)
$ in Millions
Dec. 31, 2022
Dec. 31, 2021
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]    
Held-to-maturity investment securities $ 11,239 $ 443
Time deposits 2,309 1,622
Long-term debt 651 1,012
Level 2 | Fair value    
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]    
Held-to-maturity investment securities 11,239 443
Time deposits 2,269 1,624
Long-term debt 635 1,034
Level 2 | Carrying value    
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]    
Held-to-maturity investment securities 11,126 441
Time deposits 2,309 1,622
Long-term debt 651 1,012
Level 3 | Fair value    
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]    
Loans and leases (including loans held for sale), net of allowance 53,093 50,619
Level 3 | Carrying value    
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]    
Loans and leases (including loans held for sale), net of allowance $ 55,086 $ 50,421