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Amount of gain (loss) recognized in other comprehensive income (OCI) from asset measured at fair value on recurring basis using unobservable input (level 3).

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Fair value portion of investment securities, including, but not limited to, marketable securities, derivative financial instruments, and investments accounted for under the equity method.

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The fair value amount of long-term debt whether such amount is presented as a separate caption or as a parenthetical disclosure. Additionally, this element may be used in connection with the fair value disclosures required in the footnote disclosures to the financial statements. The element may be used in both the balance sheet and disclosure in the same submission.

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Fair value portion of an agreement for an unconditional promise by the maker to pay the holder a definite sum of money at a future date.

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Amount before tax and reclassification adjustments of gain (loss) on foreign currency translation adjustments, foreign currency transactions designated and effective as economic hedges of a net investment in a foreign entity and intra-entity foreign currency transactions that are of a long-term-investment nature.

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The aggregate value of all restricted investments.

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RISK MANAGEMENT AND FINANCIAL INSTRUMENTS - Other Financial Instruments (Details) - CAD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2022	Sep. 30, 2021	Sep. 30, 2022	Sep. 30, 2021	Dec. 31, 2021
Fair Value of Other Financial Instruments
FMVA investments	$ 102		$ 102		$ 52
Restricted long-term investments	569		569		630
Cash and cash equivalents	1,021		1,021		286
Long-term debt, carrying value	80,700		80,700		74,400
Long-term debt	74,200		74,200		82,000
Equity Funds And Debt Securities
Fair Value of Other Financial Instruments
Unrealized gain (loss) on lnvestments	(13)	$ 1	(40)	$ 4
Net investment hedges
Fair Value of Other Financial Instruments
Unrealized foreign exchange gain (loss) on translation of United States dollar denominated debt			(1,191)	18
Unrealized gain (loss) on change in fair value of outstanding forward exchange forward contracts			0	0
Unrealized gain (loss) associated with the settlement of outstanding forward exchange forward contracts			0	0
Level 1
Fair Value of Other Financial Instruments
Restricted long-term investments	219		219		217
Level 1 \| Debt Securities
Fair Value of Other Financial Instruments
Fair value of investments	108		108		14
Level 2
Fair Value of Other Financial Instruments
Restricted long-term investments	350		350		413
Level 2 \| Debt Securities
Fair Value of Other Financial Instruments
Fair value of investments	400		400		290
Fair Value
Fair Value of Other Financial Instruments
Unrealized holding gains (losses)	11	$ (16)	(120)	$ (41)
Fair value note receivable	752		752		954
Carrying value
Fair Value of Other Financial Instruments
Non-current notes receivable	$ 752		$ 752		$ 954