Supplemental Cash Flow Information (Tables)

12 Months Ended

Dec. 31, 2020

Cash Flow Statement [Abstract]

Summary of Cash Flow Information

(CAD$ in millions)	December 31, 2020		December 31, 2019
Cash and cash equivalents
Cash	$	137	$	149
Investments with maturities from the date of acquisition of three months or less	313		877
	$	450	$	1,026

Summary of Non-Cash Working Capital Items

(CAD$ in millions)	2020		2019
Net change in non-cash working capital items
Trade and settlement receivables	$	(294)	$	97
Prepaids and other current assets	(102)		(69)
Inventories	100		16
Trade accounts payable and other liabilities	55		(204)
	$	(241)	$	(160)