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Financial assets and liabilities - Schedule of Interest Rate Swaps to Hedge the Fair Value and Interest Cost of Debt Instruments (Details) - Interest rate swap - Interest rate risk $ in Millions | Jun. 30, 2026 CAD ($)
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E Notes | 2036 |
Disclosure of detailed information about hedging instruments [line items] |
Notional amount | $ 750
E Notes | 2031 |
Disclosure of detailed information about hedging instruments [line items] |
Notional amount | 750
EH Notes | 2031 |
Disclosure of detailed information about hedging instruments [line items] |
Notional amount | 400
EH Notes | 2041 |
Disclosure of detailed information about hedging instruments [line items] |
Notional amount | 400
EO Notes | 2046 |
Disclosure of detailed information about hedging instruments [line items] |
Notional amount | 150
EO Notes | 2031-2032 |
Disclosure of detailed information about hedging instruments [line items] |
Notional amount | 150
EU Notes | 2046 |
Disclosure of detailed information about hedging instruments [line items] |
Notional amount | 150
EU Notes | 2032 |
Disclosure of detailed information about hedging instruments [line items] |
Notional amount | 150
M-45 MTN debentures | 2047 |
Disclosure of detailed information about hedging instruments [line items] |
Notional amount | 33
M-45 MTN debentures | 2028 |
Disclosure of detailed information about hedging instruments [line items] |
Notional amount | 33
M-61 MTN debentures | 2031 |
Disclosure of detailed information about hedging instruments [line items] |
Notional amount | 400
M-61 MTN debentures | 2046 |
Disclosure of detailed information about hedging instruments [line items] |
Notional amount | 400
M-68 MTN debentures | 2029 |
Disclosure of detailed information about hedging instruments [line items] |
Notional amount | 750
M-70 MTN debentures | 2031 |
Disclosure of detailed information about hedging instruments [line items] |
Notional amount | 700
M-70 MTN debentures | 2046 |
Disclosure of detailed information about hedging instruments [line items] |
Notional amount | $ 700

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