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Balance Sheet Account Details - Narrative - Strategic Investments (Details) - USD ($)
$ in Millions
3 Months Ended 9 Months Ended
Oct. 01, 2017
Oct. 02, 2016
Oct. 01, 2017
Oct. 02, 2016
Jan. 01, 2017
Schedule of Investments [Line Items]          
Commitment in new venture capital investment fund $ 100   $ 100    
Callable period     10 years    
Equity method investments 14   $ 14   $ 10
Cost-Method Investee [Member]          
Schedule of Investments [Line Items]          
Revenue from transactions with Company's cost-method investments in non-publicly traded companies 38 $ 12 96 $ 42  
Other Assets [Member]          
Schedule of Investments [Line Items]          
Company's cost-method investments in non-publicly traded companies $ 250   $ 250   $ 57