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Inventories (Tables)

12 Months Ended

Dec. 31, 2021


	December 31, 2020		December 31, 2021
	NT$		NT$
	(In Millions)		(In Millions)
Finished goods	$	21,705.6	$	32,562.8
Work in process		91,672.9		137,700.4
Raw materials		14,716.0		11,111.1
Supplies and spare parts		9,258.9		11,728.0


	$	137,353.4	$	193,102.3

Inventory write downs

Write-down of inventories to net realizable value and reversal of write-down of inventories resulting from the increase in net realizable value were included in the cost of revenue during reporting period. The amounts are illustrated below:


	Years Ended December 31
	2019			2020		2021
	NT$			NT$		NT$
	(In Millions)			(In Millions)		(In Millions)
Inventory losses (reversal of write-down of inventories)	$	(1,983.0	)	$	3,664.5	$	533.0