v3.22.2.2
Parent company information - Summary of Parent Company Information - Condensed Statements of Income and Comprehensive Income (Detail) - CAD ($)
$ in Millions
 12 Months Ended
Oct. 31, 2022
Oct. 31, 2021
Parent company information [line items]    
Interest expense $ 18,054 $ 8,143
Net interest income 22,717 20,002
Non-interest income 26,268 29,691
Total revenue 48,985 49,693
Provision for credit losses 484 (753)
Non-interest expense 26,609 25,924
Income before income taxes 20,109 20,631
Income taxes 4,302 4,581
Net income 15,807 16,050
Other comprehensive income (loss), net of taxes 5,818 1,456
Total comprehensive income (loss) 21,625 17,506
Parent [member]    
Parent company information [line items]    
Interest and dividend income 27,791 19,793
Interest expense 12,846 5,615
Net interest income 14,945 14,178
Non-interest income 5,425 5,393
Total revenue 20,370 19,571
Provision for credit losses 579 (606)
Non-interest expense 10,175 9,466
Income before income taxes 9,616 10,711
Income taxes 2,276 2,088
Net income before equity in undistributed income of subsidiaries 7,340 8,623
Equity in undistributed income of subsidiaries 8,454 7,415
Net income 15,794 16,038
Other comprehensive income (loss), net of taxes 5,810 1,463
Total comprehensive income (loss) $ 21,604 $ 17,501