Inventories

12 Months Ended

Dec. 31, 2021

Inventories [Abstract]

Inventories

Inventories

(CAD$ in millions)	December 31, 2021		December 31, 2020
Supplies	$	797	$	757
Raw materials	250		197
Work in process	741		592
Finished products	728		410
	2,516		1,956
Less long-term portion (Note 13)	(126)		(84)
	$	2,390	$	1,872

Cost of sales of $8.4 billion (2020 – $7.6 billion) includes $7.6 billion (2020 – $7.0 billion) of production costs that are recognized as part of inventories and subsequently expensed when sold during the year.

Total inventories held at net realizable value amounted to $45 million at December 31, 2021 (2020 – $75 million). Total inventory write-downs in 2021 were $12 million (2020 – $151 million) and were included as part of cost of sales.

Long-term inventories consist of ore stockpiles and other in-process materials that are not expected to be processed within one year.