v3.22.2.2
Goodwill and other intangible assets - Summary of Terminal Growth Rates and Pre-tax Discount Rates Used in Discounted Cash Flow Models (Detail)
Aug. 01, 2022
Aug. 01, 2021
Canadian Banking [member]    
Disclosure of information for cash-generating units [line items]    
Discount rate 11.00% 9.40%
Terminal growth rate 3.00% 3.00%
Caribbean Banking [member]    
Disclosure of information for cash-generating units [line items]    
Discount rate 12.60% 10.90%
Terminal growth rate 3.50% 3.50%
Canadian Wealth Management [member]    
Disclosure of information for cash-generating units [line items]    
Discount rate 11.80% 10.50%
Terminal growth rate 3.00% 3.00%
Global asset management [member]    
Disclosure of information for cash-generating units [line items]    
Discount rate 11.80% 10.50%
Terminal growth rate 3.00% 3.00%
U.S. Wealth Management (including City National) [member]    
Disclosure of information for cash-generating units [line items]    
Discount rate 12.80% 11.10%
Terminal growth rate 3.00% 3.00%
Insurance [member]    
Disclosure of information for cash-generating units [line items]    
Discount rate 11.60% 10.20%
Terminal growth rate 3.00% 3.00%
Investor & Treasury Services [member]    
Disclosure of information for cash-generating units [line items]    
Discount rate 11.80% 9.90%
Terminal growth rate 3.00% 3.00%
Capital Markets [member]    
Disclosure of information for cash-generating units [line items]    
Discount rate 12.40% 11.80%
Terminal growth rate 3.00% 3.00%