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Significant Accounting Policies (Tables)

12 Months Ended

Dec. 31, 2022

Summary of Estimated Useful Lives of Property, Plant and Equipment

Depreciation of all property and equipment, except for land, is calculated using the straight-line method to allocate their cost, net of their residual values, over their estimated useful lives as follows:


		Useful Life
Buildings		5 – 40 years
Structures		5 – 40 years
Machinery and equipment (Telecommunications equipment and others)		2 – 40 years
Vehicles		4 – 10 years
Tools		2 – 6 years
Office equipment		2 – 6 years

Summary of Amortization of Intangible Assets With Limited Useful Life

The Group amortizes intangible assets with a limited useful life using the straight-line method over the following periods:


		Useful Life
Development costs		3 – 7 years
Software		3 – 7 years
Frequency usage rights		5 – 10 years
Others 1		1 – 50 years

Membership rights (condominium membership and golf membership), subscription rights, broadcast license, facility usage rights and transportation license included in others are classified as intangible assets with indefinite useful life.