Lease Arrangements (Tables)

12 Months Ended

Dec. 31, 2022

Disclosure of quantitative information about leases for lessee [abstract]

Summary of Right-of-use Assets

a.Right-of-use assets

	December 31
	2021		2022
	NT$		NT$
	(In Millions)
Land and buildings
Handsets base stations	$	6,988	$	7,175
Others		1,538		1,727
Equipment		2,525		2,201
	$	11,051	$	11,103

	Year Ended December 31
	2020		2021		2022
	NT$		NT$		NT$
	(In Millions)
Additions to right-of-use assets	$	3,796	$	4,669	$	4,369
Depreciation charge for right-of-use assets
Land and buildings
Handsets base stations	$	2,729	$	2,789	$	2,863
Others		786		786		770
Equipment		416		410		349
	$	3,931	$	3,985	$	3,982

Summary of Lease Liabilities

b.Lease liabilities

	December 31
	2021		2022
	NT$		NT$
	(In Millions)
Lease liabilities
Current	$	3,211	$	3,339
Noncurrent		7,062		7,334
	$	10,273	$	10,673

Summary of Range of Discount Rate for Lease Liabilities

Ranges of discount rates for lease liabilities were as follows:

	December 31
	2021	2022
Land and buildings
Handsets base stations	0.37%-1.18%	0.37%-1.71%
Others	0.37%-9.00%	0.37%-9.00%
Equipment	0.37%-2.99%	0.37%-2.99%

Summary of Total Cash Outflow for Leases

d.Other lease information

	Year Ended December 31
	2020		2021		2022
	NT$		NT$		NT$
	(In Millions)
Expenses relating to low-value asset leases	$	8	$	8	$	9
Expenses relating to variable lease payments not included in      the measurement of lease liabilities	$	5	$	7	$	8
Total cash outflow for leases	$	3,776	$	3,813	$	3,869