XML 214 R185.htm IDEA: XBRL DOCUMENT v3.24.0.1
Income Taxes - Additional Information (Detail) - CAD ($)
$ in Millions
 12 Months Ended
Dec. 31, 2023
Dec. 31, 2022
Dec. 31, 2025
Jan. 01, 2022
Statement [line items]        
Effective income tax rate 27.80% 27.50%    
Current tax receivable $ 1,056 $ 1,135    
Current tax payable 147 195    
Deferred tax assets 6,739 6,708 $ 6,708 $ 7,767
Deferred tax assets - recognition dependent on future taxable profits 6,136      
Operating tax loss carry forward 3,549 3,902    
Operating tax loss carry forward expired in future 3,300      
Operating tax loss carry forward without expiration date 249      
Capital tax loss carry forward 5 1    
Tax benefit on loss carry forwards for which deferred tax asset recognized 670 701    
Tax benefit of loss carry forwards for which no deferred tax asset recognized 222 211    
Tax credit carry forwards which expire in future 282 273    
Tax credit carryforwards of which benefit not recognized $ 160 164    
Tax credit/Loss carryforwards expiration period between the years 2026 and 2043      
Deferred tax liability $ 1,697 1,536 $ 1,536 $ 1,713
Aggregate amount of taxable temporary differences associated with the Company's own investments in subsidiaries, not included in financial statements 10,908 11,439    
Unused tax credits [member]        
Statement [line items]        
Deferred tax assets 1,171 663    
Temporary differences [member]        
Statement [line items]        
Deferred tax assets $ 5,333 $ 2,523