Goodwill and Other Intangible Assets (Tables)
 12 Months Ended
Jan. 02, 2016
Goodwill and Intangible Assets Disclosure [Abstract]  
Schedule of Changes in Carrying Amount of Goodwill
The changes in the carrying amount of goodwill for the fiscal years ended January 2, 2016 and January 3, 2015 were as follows (in millions):
Balance as of December 28, 2013
$
3,524

NeuroTherm
125

Spinal Modulation
(36
)
Foreign currency translation and other
(81
)
Balance as of January 3, 2015
3,532

Thoratec
2,142

Foreign currency translation and other
(23
)
Balance as of January 2, 2016
$
5,651
Schedule of Gross Carrying Amount of Other Intangible Assets and Related Accumulated Amortization
The following table provides the gross carrying amount of other intangible assets and related accumulated amortization (in millions):
 
January 2, 2016
 
January 3, 2015
 
Gross
Carrying
Amount
 
Accumulated
Amortization
 
Gross
Carrying
Amount
 
Accumulated
Amortization
Definite-lived intangible assets:
 

 
 

 
 

 
 

Purchased technology and patents
$
1,840

 
$
578

 
$
1,162

 
$
473

Trademarks and tradenames
115

 
16

 
22

 
13

Customer lists and relationships
21

 
16

 
19

 
14

Licenses, distribution agreements and other
6

 
2

 
7

 
2

 
$
1,982

 
$
612

 
$
1,210

 
$
502

Indefinite-lived intangible assets:
 

 
 

 
 

 
 

Acquired IPR&D
$
829

 
 

 
$
116

 
 

Trademarks and tradenames
27

 
 

 
27

 
 

 
$
856

 
 

 
$
143

 
 
Schedule of Future Amortization Expense
The following table presents expected future amortization expense for acquired intangible assets recognized as of January 2, 2016 and expected amortization expense of indefinite-lived IPR&D assets based on anticipated regulatory product approvals (in millions):
 
 
 
 
 
 
 
 
 
 
 
After
 
2016
 
2017
 
2018
 
2019
 
2020
 
2020
  Amortization expense
$
184

 
$
222

 
$
237

 
$
231

 
$
220

 
$
1,105