Financial Instrument Risk Management - Debt Securities by Issuer and Industry Sector (Details) - CAD ($)
$ in Millions

Dec. 31, 2023

Dec. 31, 2022

Dec. 31, 2021

Disclosure of financial assets [line items]

Notional amount

$ 162,948

$ 157,035

$ 174,499

Total government issued or guaranteed debt securities

Disclosure of financial assets [line items]

Notional amount

25,433

25,437

Total government issued or guaranteed debt securities | FVTPL

Disclosure of financial assets [line items]

Notional amount

22,896

20,822

Total government issued or guaranteed debt securities | FVOCI

Disclosure of financial assets [line items]

Notional amount

2,537

4,615

Canadian federal government

Disclosure of financial assets [line items]

Notional amount

6,010

5,611

Canadian federal government | FVTPL

Disclosure of financial assets [line items]

Notional amount

5,161

3,696

Canadian federal government | FVOCI

Disclosure of financial assets [line items]

Notional amount

849

1,915

Canadian provincial and municipal government

Disclosure of financial assets [line items]

Notional amount

14,251

13,665

Canadian provincial and municipal government | FVTPL

Disclosure of financial assets [line items]

Notional amount

13,694

12,612

Canadian provincial and municipal government | FVOCI

Disclosure of financial assets [line items]

Notional amount

557

1,053

U.S. government and agency

Disclosure of financial assets [line items]

Notional amount

1,370

1,537

U.S. government and agency | FVTPL

Disclosure of financial assets [line items]

Notional amount

712

759

U.S. government and agency | FVOCI

Disclosure of financial assets [line items]

Notional amount

658

778

Other foreign government

Disclosure of financial assets [line items]

Notional amount

3,802

4,624

Other foreign government | FVTPL

Disclosure of financial assets [line items]

Notional amount

3,329

3,755

Other foreign government | FVOCI

Disclosure of financial assets [line items]

Notional amount

473

869

Total corporate debt securities

Disclosure of financial assets [line items]

Notional amount

40,129

41,310

Total corporate debt securities | FVTPL

Disclosure of financial assets [line items]

Notional amount

32,149

32,862

Total corporate debt securities | FVOCI

Disclosure of financial assets [line items]

Notional amount

7,980

8,448

Asset-backed securities

Disclosure of financial assets [line items]

Notional amount

9,931

9,155

Asset-backed securities | FVTPL

Disclosure of financial assets [line items]

Notional amount

6,135

5,673

Asset-backed securities | FVOCI

Disclosure of financial assets [line items]

Notional amount

3,796

3,482

Total debt securities

Disclosure of financial assets [line items]

Notional amount

75,493

75,902

Total debt securities | FVTPL

Disclosure of financial assets [line items]

Notional amount

61,180

59,357

Total debt securities | FVOCI

Disclosure of financial assets [line items]

Notional amount

14,313

16,545

Financials | Total corporate debt securities

Disclosure of financial assets [line items]

Notional amount

11,060

11,355

Financials | Total corporate debt securities | FVTPL

Disclosure of financial assets [line items]

Notional amount

8,171

8,232

Financials | Total corporate debt securities | FVOCI

Disclosure of financial assets [line items]

Notional amount

2,889

3,123

Utilities | Total corporate debt securities

Disclosure of financial assets [line items]

Notional amount

7,059

6,676

Utilities | Total corporate debt securities | FVTPL

Disclosure of financial assets [line items]

Notional amount

6,244

5,884

Utilities | Total corporate debt securities | FVOCI

Disclosure of financial assets [line items]

Notional amount

815

792

Industrials | Total corporate debt securities

Disclosure of financial assets [line items]

Notional amount

5,489

5,575

Industrials | Total corporate debt securities | FVTPL

Disclosure of financial assets [line items]

Notional amount

4,510

4,533

Industrials | Total corporate debt securities | FVOCI

Disclosure of financial assets [line items]

Notional amount

979

1,042

Energy | Total corporate debt securities

Disclosure of financial assets [line items]

Notional amount

3,272

3,342

Energy | Total corporate debt securities | FVTPL

Disclosure of financial assets [line items]

Notional amount

2,793

2,978

Energy | Total corporate debt securities | FVOCI

Disclosure of financial assets [line items]

Notional amount

479

364

Communication services | Total corporate debt securities

Disclosure of financial assets [line items]

Notional amount

3,149

3,329

Communication services | Total corporate debt securities | FVTPL

Disclosure of financial assets [line items]

Notional amount

2,727

2,861

Communication services | Total corporate debt securities | FVOCI

Disclosure of financial assets [line items]

Notional amount

422

468

Real estate | Total corporate debt securities

Disclosure of financial assets [line items]

Notional amount

2,525

2,506

Real estate | Total corporate debt securities | FVTPL

Disclosure of financial assets [line items]

Notional amount

1,987

1,865

Real estate | Total corporate debt securities | FVOCI

Disclosure of financial assets [line items]

Notional amount

538

641

Health care | Total corporate debt securities

Disclosure of financial assets [line items]

Notional amount

2,038

2,034

Health care | Total corporate debt securities | FVTPL

Disclosure of financial assets [line items]

Notional amount

1,625

1,618

Health care | Total corporate debt securities | FVOCI

Disclosure of financial assets [line items]

Notional amount

413

416

Consumer staples | Total corporate debt securities

Disclosure of financial assets [line items]

Notional amount

1,805

1,978

Consumer staples | Total corporate debt securities | FVTPL

Disclosure of financial assets [line items]

Notional amount

1,490

1,634

Consumer staples | Total corporate debt securities | FVOCI

Disclosure of financial assets [line items]

Notional amount

315

344

Consumer discretionary | Total corporate debt securities

Disclosure of financial assets [line items]

Notional amount

1,726

1,836

Consumer discretionary | Total corporate debt securities | FVTPL

Disclosure of financial assets [line items]

Notional amount

950

1,085

Consumer discretionary | Total corporate debt securities | FVOCI

Disclosure of financial assets [line items]

Notional amount

776

751

Information technology | Total corporate debt securities

Disclosure of financial assets [line items]

Notional amount

904

1,384

Information technology | Total corporate debt securities | FVTPL

Disclosure of financial assets [line items]

Notional amount

730

1,095

Information technology | Total corporate debt securities | FVOCI

Disclosure of financial assets [line items]

Notional amount

174

289

Materials | Total corporate debt securities

Disclosure of financial assets [line items]

Notional amount

1,102

1,295

Materials | Total corporate debt securities | FVTPL

Disclosure of financial assets [line items]

Notional amount

922

1,077

Materials | Total corporate debt securities | FVOCI

Disclosure of financial assets [line items]

Notional amount

$ 180

$ 218