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Intangible Assets (Tables)
 12 Months Ended
Dec. 31, 2017
Disclosure Of Intangible Assets [Abstract]  
Summary of Intangible Assets

 

 

 

December 31

 

 

 

2016

 

 

2017

 

 

 

NT$

 

 

NT$

 

 

 

(In Millions)

 

Carrying amount

 

 

 

 

 

 

 

 

3G and 4G concession

 

$

45,796

 

 

$

53,469

 

Computer software

 

 

995

 

 

 

880

 

Goodwill

 

 

218

 

 

 

209

 

Others

 

 

344

 

 

 

325

 

 

 

$

47,353

 

 

$

54,883

 

 

 

 

3G and 4G Concession

 

 

Computer Software

 

 

Goodwill

 

 

Others

 

 

Total

 

 

 

NT$

 

 

NT$

 

 

NT$

 

 

NT$

 

 

NT$

 

 

 

(In Millions)

 

Cost

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Balance on January 1, 2015

 

$

49,254

 

 

$

3,192

 

 

$

181

 

 

$

151

 

 

$

52,778

 

Additions-acquired separately

 

 

9,955

 

 

 

424

 

 

 

—

 

 

 

1

 

 

 

10,380

 

Disposal

 

 

—

 

 

 

(375

)

 

 

—

 

 

 

(2

)

 

 

(377

)

Effect of foreign exchange difference

 

 

—

 

 

 

—

 

 

 

—

 

 

 

—

 

 

 

—

 

Acquisitions through business combinations

 

 

—

 

 

 

—

 

 

 

55

 

 

 

259

 

 

 

314

 

Others

 

 

—

 

 

 

8

 

 

 

—

 

 

 

—

 

 

 

8

 

Balance on December 31, 2015

 

$

59,209

 

 

$

3,249

 

 

$

236

 

 

$

409

 

 

$

63,103

 

Accumulated amortization and impairment

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Balance on January 1, 2015

 

$

(8,104

)

 

$

(1,793

)

 

$

(18

)

 

$

(38

)

 

$

(9,953

)

Amortization expenses

 

 

(2,504

)

 

 

(565

)

 

 

—

 

 

 

(11

)

 

 

(3,080

)

Disposal

 

 

—

 

 

 

375

 

 

 

—

 

 

 

2

 

 

 

377

 

Effect of foreign exchange difference

 

 

—

 

 

 

—

 

 

 

—

 

 

 

—

 

 

 

—

 

Others

 

 

—

 

 

 

—

 

 

 

—

 

 

 

—

 

 

 

—

 

Balance on December 31, 2015

 

$

(10,608

)

 

$

(1,983

)

 

$

(18

)

 

$

(47

)

 

$

(12,656

)

Cost

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Balance on January 1, 2016

 

$

59,209

 

 

$

3,249

 

 

$

236

 

 

$

409

 

 

$

63,103

 

Additions-acquired separately

 

 

—

 

 

 

277

 

 

 

—

 

 

 

5

 

 

 

282

 

Disposal

 

 

—

 

 

 

(121

)

 

 

—

 

 

 

—

 

 

 

(121

)

Effect of foreign exchange difference

 

 

—

 

 

 

—

 

 

 

—

 

 

 

—

 

 

 

—

 

Others

 

 

—

 

 

 

3

 

 

 

—

 

 

 

—

 

 

 

3

 

Balance on December 31, 2016

 

$

59,209

 

 

$

3,408

 

 

$

236

 

 

$

414

 

 

$

63,267

 

Accumulated amortization and impairment

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Balance on January 1, 2016

 

$

(10,608

)

 

$

(1,983

)

 

$

(18

)

 

$

(47

)

 

$

(12,656

)

Amortization expenses

 

 

(2,805

)

 

 

(551

)

 

 

—

 

 

 

(23

)

 

 

(3,379

)

Disposal

 

 

—

 

 

 

121

 

 

 

—

 

 

 

—

 

 

 

121

 

Impairment losses

 

 

—

 

 

 

—

 

 

 

—

 

 

 

—

 

 

 

—

 

Effect of foreign exchange difference

 

 

—

 

 

 

—

 

 

 

—

 

 

 

—

 

 

 

—

 

Balance on December 31, 2016

 

$

(13,413

)

 

$

(2,413

)

 

$

(18

)

 

$

(70

)

 

$

(15,914

)

Cost

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Balance on January 1, 2017

 

$

59,209

 

 

$

3,408

 

 

$

236

 

 

$

414

 

 

$

63,267

 

Additions-acquired separately

 

 

10,935

 

 

 

366

 

 

 

—

 

 

 

4

 

 

 

11,305

 

Disposal

 

 

—

 

 

 

(462

)

 

 

—

 

 

 

—

 

 

 

(462

)

Effect of foreign exchange difference

 

 

—

 

 

 

—

 

 

 

—

 

 

 

—

 

 

 

—

 

Balance on December 31, 2017

 

$

70,144

 

 

$

3,312

 

 

$

236

 

 

$

418

 

 

$

74,110

 

Accumulated amortization and impairment

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Balance on January 1, 2017

 

$

(13,413

)

 

$

(2,413

)

 

$

(18

)

 

$

(70

)

 

$

(15,914

)

Amortization expenses

 

 

(3,262

)

 

 

(481

)

 

 

—

 

 

 

(23

)

 

 

(3,766

)

Disposal

 

 

—

 

 

 

462

 

 

 

—

 

 

 

—

 

 

 

462

 

Impairment losses

 

 

—

 

 

 

—

 

 

 

(9

)

 

 

—

 

 

 

(9

)

Effect of foreign exchange difference

 

 

—

 

 

 

—

 

 

 

—

 

 

 

—

 

 

 

—

 

Balance on December 31, 2017

 

$

(16,675

)

 

$

(2,432

)

 

$

(27

)

 

$

(93

)

 

$

(19,227

)