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Loans - Details of Negotiable Obligations (Parenthetical) (Detail)
$ in Millions
Dec. 31, 2022
USD ($)
Medium Term Notes [member] | Nineteen Ninety Seven [member]  
Disclosure of detailed information about loans [line items]  
Negotiable amount $ 1,000
Medium Term Notes [member] | Two Thousand Eight [member]  
Disclosure of detailed information about loans [line items]  
Negotiable amount 10,000
Frequent Issuer Program [Member]  
Disclosure of detailed information about loans [line items]  
Negotiable amount $ 7,215