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Supplementary Information To Condensed Consolidated Statements Of Cash Flows (Details) - CAD ($) $ in Millions	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019
Changes in non-cash working capital
Inventory	$ 6	$ (19)
Receivables and other current assets	187	154
Accounts payable	55	(137)
Other current liabilities	(31)	(71)
Total non-cash working capital	217	(73)
Supplemental disclosure of cash paid:
Interest	679	750
Income Taxes	(148)	(107)
Supplemental disclosure of non-cash activities:
Common share dividends reinvested	199	187
Reclassification of long-term debt from current to non-current	256	0
Increase in accrued capital expenditures	$ 17	$ 33

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The amount of cash paid during the current period to foreign, federal, state, and local authorities as taxes on income, net of any cash received during the current period as refunds for the overpayment of taxes.

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