Change in non-cash working capital balances related to operations (Tables)

12 Months Ended

Dec. 31, 2021

Supplemental Cash Flow Elements [Abstract]

Changes In Non-cash Working Capital Balances Related To Operations

(in millions of Canadian dollars)	2021		2020		2019
Source (use) of cash:
Accounts receivable, net	$	32	$	(61)	$	27
Materials and supplies	(14)		(15)		(8)
Other current assets	24		(5)		(24)
Accounts payable and accrued liabilities	(108)		(308)		(21)
Change in non-cash working capital	$	(66)	$	(389)	$	(26)