Annual report pursuant to Section 13 and 15(d)

Financial Instruments (Details) (Cash and Cash Equivalents)

v3.6.0.2
Financial Instruments (Details) (Cash and Cash Equivalents) - USD ($)
$ in Millions
Dec. 31, 2016
Dec. 26, 2015
Schedule of Investments [Line Items]    
Cash and cash equivalents, at fair value $ 1,264 $ 785
Fair value, inputs, level 1    
Schedule of Investments [Line Items]    
Cash and cash equivalents, at fair value 50 0
Fair Value, Inputs, Level 2    
Schedule of Investments [Line Items]    
Cash and cash equivalents, at fair value 1,147 376
Cash    
Schedule of Investments [Line Items]    
Cash and cash equivalents, at fair value 67 409
Money market funds | Fair value, inputs, level 1    
Schedule of Investments [Line Items]    
Cash and cash equivalents, at fair value 50 0
Commercial paper | Fair Value, Inputs, Level 2    
Schedule of Investments [Line Items]    
Cash and cash equivalents, at fair value $ 1,147 $ 376