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Risk Management (Details) - Schedule of amortized costs and net loss of modified financial assets
$ in Millions
 12 Months Ended
Dec. 31, 2020
USD ($)
Post Modification [Member] | Facilities that have cured since modification and are now measured using 12mECLs (Stage 1) [Member]  
Risk Management (Details) - Schedule of amortized costs and net loss of modified financial assets [Line Items]  
Gross carrying amount, Post modification $ 24,432
Corresponding ECL, Post modification 1,907
Post Modification [Member] | Facilities that reverted to (Stage 2/3) lifetime ECLs having once cured [Member]  
Risk Management (Details) - Schedule of amortized costs and net loss of modified financial assets [Line Items]  
Gross carrying amount, Pre-modification 8,620
Corresponding ECL, Pre-modification 2,130
Pre Modification [Member] | Facilities that have cured since modification and are now measured using 12mECLs (Stage 1) [Member]  
Risk Management (Details) - Schedule of amortized costs and net loss of modified financial assets [Line Items]  
Gross carrying amount, Post modification 24,759
Corresponding ECL, Post modification 3,474
Pre Modification [Member] | Facilities that reverted to (Stage 2/3) lifetime ECLs having once cured [Member]  
Risk Management (Details) - Schedule of amortized costs and net loss of modified financial assets [Line Items]  
Gross carrying amount, Pre-modification 8,634
Corresponding ECL, Pre-modification $ 908