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Inventories (Tables)

12 Months Ended

Dec. 31, 2021

Classes of current inventories [abstract]

Inventories as of December 31, 2020 and 2021 are as follows:


		2020
		Acquisition cost		Valuation allowance			Book value
		In millions of won
Raw materials	￦		3,602,073		(885	)		3,601,188
Merchandises			234		—			234
Work-in-progress			148,067		—			148,067
Finished goods			42,070		—			42,070
Supplies			2,280,682		(7,892	)		2,272,790
Inventories-in-transit			666,967		—			666,967
Other inventories			11,593		—			11,593

	￦		6,751,686		(8,777	)		6,742,909


		2021
		Acquisition cost		Valuation allowance			Book value
		In millions of won
Raw materials	￦		3,655,588		(1,247	)		3,654,341
Merchandises			512		—			512
Work-in-progress			180,220		—			180,220
Finished goods			27,254		—			27,254
Supplies			2,541,028		(3,869	)		2,537,159
Inventories-in-transit			1,195,148		—			1,195,148
Other inventories			13,548		—			13,548

	￦		7,613,298		(5,116	)		7,608,182

The reversals of the allowance for loss on inventory valuation due to increase in the net realizable value of inventories deducted from cost of sales for the years ended December 31, 2019, 2020 and 2021 were ￦4,872 million, ￦2,020 million and ￦11,422 million, respectively.

The amounts of loss from inventory valuation included in other gains or losses for the years ended December 31, 2019, 2020 and 2021 were ￦3,127 million, ￦4,998 million and ￦7,761 million, respectively.