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Revenue (Tables)
 12 Months Ended
Dec. 31, 2020
Revenue [Abstract]  
Summary of Revenue

 

 

 

Year Ended December 31

 

 

 

2018

 

 

2019

 

 

2020

 

 

 

NT$

 

 

NT$

 

 

NT$

 

 

 

(In Millions)

 

Revenue from contracts with customers

 

$

214,461

 

 

$

206,360

 

 

$

206,396

 

Other revenues

 

 

 

 

 

 

 

 

 

 

 

 

Rental income

 

 

640

 

 

 

818

 

 

 

843

 

Others

 

 

382

 

 

 

342

 

 

 

370

 

 

 

 

1,022

 

 

 

1,160

 

 

 

1,213

 

Total

 

$

215,483

 

 

$

207,520

 

 

$

207,609

 
Summary of Disaggregation of Revenue

 

a.

Disaggregation of revenue

2018

 

 

 

Domestic

Fixed

Communi-

cations

Business

 

 

Mobile

Communi-

cations

Business

 

 

Internet

Business

 

 

International

Fixed

Communi-

cations

Business

 

 

Others

 

 

Total

 

 

 

NT$

 

 

NT$

 

 

NT$

 

 

NT$

 

 

NT$

 

 

NT$

 

 

 

(In Millions)

 

Main Products and Service Revenues

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Mobile services revenue

 

$

—

 

 

$

63,906

 

 

$

—

 

 

$

—

 

 

$

—

 

 

$

63,906

 

Sales of products

 

 

1,731

 

 

 

35,702

 

 

 

4

 

 

 

251

 

 

 

3,601

 

 

 

41,289

 

Local telephone and domestic long distance telephone

   services revenue

 

 

29,996

 

 

 

—

 

 

 

—

 

 

 

—

 

 

 

—

 

 

 

29,996

 

Broadband access and domestic leased line services

   revenue

 

 

22,453

 

 

 

—

 

 

 

—

 

 

 

—

 

 

 

—

 

 

 

22,453

 

Data Communications internet services revenue

 

 

—

 

 

 

—

 

 

 

21,137

 

 

 

—

 

 

 

—

 

 

 

21,137

 

International network and leased line services

   revenue

 

 

—

 

 

 

—

 

 

 

—

 

 

 

8,724

 

 

 

—

 

 

 

8,724

 

Others

 

 

11,923

 

 

 

1,269

 

 

 

8,509

 

 

 

4,449

 

 

 

806

 

 

 

26,956

 

 

 

$

66,103

 

 

$

100,877

 

 

$

29,650

 

 

$

13,424

 

 

$

4,407

 

 

$

214,461

 

 

2019

 

 

 

Domestic

Fixed

Communi-

cations

Business

 

 

Mobile

Communi-

cations

Business

 

 

Internet

Business

 

 

International

Fixed

Communi-

cations

Business

 

 

Others

 

 

Total

 

 

 

NT$

 

 

NT$

 

 

NT$

 

 

NT$

 

 

NT$

 

 

NT$

 

 

 

(In Millions)

 

Main Products and Service Revenues

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Mobile services revenue

 

$

—

 

 

$

58,703

 

 

$

—

 

 

$

—

 

 

$

—

 

 

$

58,703

 

Sales of products

 

 

1,957

 

 

 

35,545

 

 

 

41

 

 

 

265

 

 

 

3,785

 

 

 

41,593

 

Local telephone and domestic long distance telephone

   services revenue

 

 

27,929

 

 

 

—

 

 

 

—

 

 

 

—

 

 

 

—

 

 

 

27,929

 

Broadband access and domestic leased line services

   revenue

 

 

22,116

 

 

 

—

 

 

 

—

 

 

 

—

 

 

 

—

 

 

 

22,116

 

Data Communications internet services revenue

 

 

—

 

 

 

—

 

 

 

21,003

 

 

 

—

 

 

 

—

 

 

 

21,003

 

International network and leased line services

   revenue

 

 

—

 

 

 

—

 

 

 

—

 

 

 

7,066

 

 

 

—

 

 

 

7,066

 

Others

 

 

13,064

 

 

 

1,142

 

 

 

8,790

 

 

 

4,144

 

 

 

810

 

 

 

27,950

 

 

 

$

65,066

 

 

$

95,390

 

 

$

29,834

 

 

$

11,475

 

 

$

4,595

 

 

$

206,360

 

 

2020

 

 

 

Domestic

Fixed

Communi-

cations

Business

 

 

Mobile

Communi-

cations

Business

 

 

Internet

Business

 

 

International

Fixed

Communi-

cations

Business

 

 

Others

 

 

Total

 

 

 

NT$

 

 

NT$

 

 

NT$

 

 

NT$

 

 

NT$

 

 

NT$

 

 

 

(In Millions)

 

Main Products and Service Revenues

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Mobile services revenue

 

$

—

 

 

$

56,724

 

 

$

—

 

 

$

—

 

 

$

—

 

 

$

56,724

 

Sales of products

 

 

2,214

 

 

 

32,112

 

 

 

107

 

 

 

313

 

 

 

4,645

 

 

 

39,391

 

Local telephone and domestic long distance telephone

   services revenue

 

 

26,475

 

 

 

—

 

 

 

—

 

 

 

—

 

 

 

—

 

 

 

26,475

 

Broadband access and domestic leased line services

   revenue

 

 

22,420

 

 

 

—

 

 

 

—

 

 

 

—

 

 

 

—

 

 

 

22,420

 

Data Communications internet services revenue

 

 

—

 

 

 

—

 

 

 

21,447

 

 

 

—

 

 

 

—

 

 

 

21,447

 

International network and leased line services

   revenue

 

 

—

 

 

 

—

 

 

 

—

 

 

 

3,884

 

 

 

—

 

 

 

3,884

 

Others

 

 

17,695

 

 

 

1,307

 

 

 

10,255

 

 

 

4,485

 

 

 

2,313

 

 

 

36,055

 

 

 

$

68,804

 

 

$

90,143

 

 

$

31,809

 

 

$

8,682

 

 

$

6,958

 

 

$

206,396

 

 

 
Summary of Contract Balances

 

b.

Contract balances

 

 

 

January 1

 

 

December 31

 

 

 

2019

 

 

2019

 

 

2020

 

 

 

NT$

 

 

NT$

 

 

NT$

 

 

 

(In Millions)

 

Trade notes and accounts receivable (Note 10)

 

$

30,076

 

 

$

26,408

 

 

$

22,622

 

Contract assets

 

 

 

 

 

 

 

 

 

 

 

 

Products and service bundling

 

$

7,123

 

 

$

6,943

 

 

$

7,232

 

Others

 

 

109

 

 

 

116

 

 

 

612

 

Less : Loss allowance

 

 

(19

)

 

 

(17

)

 

 

(18

)

 

 

$

7,213

 

 

$

7,042

 

 

$

7,826

 

Current

 

$

4,869

 

 

$

4,441

 

 

$

5,331

 

Noncurrent

 

 

2,344

 

 

 

2,601

 

 

 

2,495

 

 

 

$

7,213

 

 

$

7,042

 

 

$

7,826

 

Contract liabilities

 

 

 

 

 

 

 

 

 

 

 

 

Telecommunications business

 

$

8,193

 

 

$

12,772

 

 

$

13,602

 

Project business

 

 

4,508

 

 

 

10,360

 

 

 

6,687

 

Products and service bundling

 

 

106

 

 

 

39

 

 

 

16

 

Others

 

 

476

 

 

 

510

 

 

 

421

 

 

 

$

13,283

 

 

$

23,681

 

 

$

20,726

 

Current

 

$

10,688

 

 

$

16,840

 

 

$

13,437

 

Noncurrent

 

 

2,595

 

 

 

6,841

 

 

 

7,289

 

 

 

$

13,283

 

 

$

23,681

 

 

$

20,726

 
Summary of Changes in Contract Assets and Contract Liabilities Significant changes of contract assets and liabilities recognized resulting from product and service bundling were as follows:

 

 

 

 

Year Ended December 31

 

 

 

2018

 

 

2019

 

 

2020

 

 

 

NT$

 

 

NT$

 

 

NT$

 

 

 

(In Millions)

 

Contract assets

 

 

 

 

 

 

 

 

 

 

 

 

Net increase of customer contracts

 

$

4,126

 

 

$

6,066

 

 

$

5,972

 

Reclassified to trade receivables

 

 

(7,532

)

 

 

(6,405

)

 

 

(5,681

)

 

 

$

(3,406

)

 

$

(339

)

 

$

291

 

Contract liabilities

 

 

 

 

 

 

 

 

 

 

 

 

Net increase of customer contracts

 

$

16

 

 

$

22

 

 

$

7

 

Recognized as revenues

 

 

(194

)

 

 

(89

)

 

 

(30

)

 

 

$

(178

)

 

$

(67

)

 

$

(23

)
Summary of Revenue Recognized

Revenue recognized for the period that was included in the contract liability at the beginning of the year was as follows:

 

 

 

Year Ended December 31

 

 

 

2018

 

 

2019

 

 

2020

 

 

 

NT$

 

 

NT$

 

 

NT$

 

 

 

(In Millions)

 

Telecommunications business

 

$

7,157

 

 

$

6,186

 

 

$

5,492

 

Project business

 

 

627

 

 

 

3,973

 

 

 

6,092

 

Others

 

 

324

 

 

 

404

 

 

 

512

 

 

 

$

8,108

 

 

$

10,563

 

 

$

12,096

 
Summary of Incremental Costs of Obtaining Contracts

 

c.

Incremental costs of obtaining contracts

 

 

December 31

 

 

 

2019

 

 

2020

 

 

 

NT$

 

 

NT$

 

 

 

(In Millions)

 

Noncurrent

 

 

 

 

 

 

 

 

Incremental costs of obtaining contracts

 

$

943

 

 

$

1,000