Quarterly report pursuant to Section 13 or 15(d)

Equity Joint Venture (Details)

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Equity Joint Venture (Details)
 3 Months Ended 6 Months Ended
Jun. 30, 2018
USD ($)
Jul. 01, 2017
USD ($)
Jun. 30, 2018
USD ($)
Jul. 01, 2017
USD ($)
Dec. 30, 2017
USD ($)
Feb. 29, 2016
USD ($)
legal_entity
Schedule of Equity Method Investments [Line Items]            
Operating income [1] $ 0 $ 25,000,000 $ 0 $ 52,000,000    
Carrying value of investment [2] 57,000,000   57,000,000   $ 58,000,000  
Prepayment and other receivables—related parties [2] 25,000,000   25,000,000   33,000,000  
THATIC JV            
Schedule of Equity Method Investments [Line Items]            
Number of legal entities | legal_entity           2
Carrying value of investment 0   0      
Prepayment and other receivables—related parties 5,000,000   5,000,000   $ 3,000,000  
THATIC JV | Licensing gain            
Schedule of Equity Method Investments [Line Items]            
Estimated license fees expected to be earned over several years pursuant to a licensing agreement           $ 293,000,000
Operating income 0 25,000,000 0 52,000,000    
THATIC JV | Other services            
Schedule of Equity Method Investments [Line Items]            
Recognized credits to research and development expenses 0 0 0 0    
THATIC JV | Development and IP agreement            
Schedule of Equity Method Investments [Line Items]            
Recognized credits to research and development expenses   0   0    
THATIC JV | Royalty income            
Schedule of Equity Method Investments [Line Items]            
Operating income $ 0 $ 0 $ 0 $ 0    
[1] Prior year amounts adjusted to reflect the retrospective application of ASU 2014-09, Revenue from Contracts with Customers. Refer to Note 1.
[2] Prior year amounts adjusted to reflect the retrospective application of ASU 2014-09, Revenue from Contracts with Customers. Refer to Note 1.