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Financial assets and liabilities - Financial Instruments Measured at Fair Value (Details) - CAD ($) $ in Millions | Jun. 30, 2019 | Dec. 31, 2018
--- | --- | ---
Disclosure of financial assets [line items] |  |
Assets | $ 60,213 | $ 57,100
Liabilities | $ (39,752) | $ (36,411)
Repurchase obligation of trust ownership percentage | 9.00% | 9.00%
Maple Leaf Sports & Entertainment Ltd. (MLSE) financial liability |  |
Disclosure of financial assets [line items] |  |
Liabilities | $ (135) | $ (135)
Maple Leaf Sports & Entertainment Ltd. (MLSE) financial liability | QUOTED PRICES IN ACTIVE MARKETS FOR IDENTICAL ASSETS (LEVEL 1) |  |
Disclosure of financial assets [line items] |  |
Liabilities | 0 | 0
Maple Leaf Sports & Entertainment Ltd. (MLSE) financial liability | OBSERVABLE MARKET DATA (LEVEL 2) |  |
Disclosure of financial assets [line items] |  |
Liabilities | 0 | 0
Maple Leaf Sports & Entertainment Ltd. (MLSE) financial liability | NON-OBSERVABLE MARKET INPUTS (LEVEL 3) |  |
Disclosure of financial assets [line items] |  |
Liabilities | (135) | (135)
Publicly-traded and privately-held investments |  |
Disclosure of financial assets [line items] |  |
Assets | 121 | 110
Publicly-traded and privately-held investments | QUOTED PRICES IN ACTIVE MARKETS FOR IDENTICAL ASSETS (LEVEL 1) |  |
Disclosure of financial assets [line items] |  |
Assets | 1 | 1
Publicly-traded and privately-held investments | OBSERVABLE MARKET DATA (LEVEL 2) |  |
Disclosure of financial assets [line items] |  |
Assets | 0 | 0
Publicly-traded and privately-held investments | NON-OBSERVABLE MARKET INPUTS (LEVEL 3) |  |
Disclosure of financial assets [line items] |  |
Assets | 120 | 109
Derivative financial instruments | Derivative financial instruments |  |
Disclosure of financial assets [line items] |  |
Assets (liabilities) | (73) | 181
Derivative financial instruments | Derivative financial instruments | QUOTED PRICES IN ACTIVE MARKETS FOR IDENTICAL ASSETS (LEVEL 1) |  |
Disclosure of financial assets [line items] |  |
Assets (liabilities) | 0 | 0
Derivative financial instruments | Derivative financial instruments | OBSERVABLE MARKET DATA (LEVEL 2) |  |
Disclosure of financial assets [line items] |  |
Assets (liabilities) | (73) | 181
Derivative financial instruments | Derivative financial instruments | NON-OBSERVABLE MARKET INPUTS (LEVEL 3) |  |
Disclosure of financial assets [line items] |  |
Assets (liabilities) | 0 | 0
Other | Other |  |
Disclosure of financial assets [line items] |  |
Assets (liabilities) | 56 | 43
Other | Other | QUOTED PRICES IN ACTIVE MARKETS FOR IDENTICAL ASSETS (LEVEL 1) |  |
Disclosure of financial assets [line items] |  |
Assets (liabilities) | 1 | 0
Other | Other | OBSERVABLE MARKET DATA (LEVEL 2) |  |
Disclosure of financial assets [line items] |  |
Assets (liabilities) | 126 | 114
Other | Other | NON-OBSERVABLE MARKET INPUTS (LEVEL 3) |  |
Disclosure of financial assets [line items] |  |
Assets (liabilities) | $ (71) | $ (71)

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