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Summary of Significant Accounting Policies - Premises and Equipment (Details) - USD ($)
$ in Millions
12 Months Ended
Nov. 30, 2022
Nov. 30, 2021
Nov. 30, 2020
Property, Plant and Equipment [Line Items]      
Accumulated depreciation and amortization $ (524.6) $ (526.0)  
Depreciation and amortization 172.9 157.4 $ 158.4
Furniture, Fixtures and Equipment      
Property, Plant and Equipment [Line Items]      
Property, plant and equipment, gross 730.1 728.3  
Leasehold Improvements      
Property, Plant and Equipment [Line Items]      
Property, plant and equipment, gross $ 245.1 $ 236.8  
Minimum      
Property, Plant and Equipment [Line Items]      
Useful life of premises and equipment 3 years    
Maximum      
Property, Plant and Equipment [Line Items]      
Useful life of premises and equipment 10 years