Annual report pursuant to Section 13 and 15(d)

Debt and Other Obligations (Details) (2.125% Notes)

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Debt and Other Obligations (Details) (2.125% Notes) - USD ($)
$ in Millions
Dec. 31, 2016
Dec. 26, 2015
Debt Instrument [Line Items]    
Principal $ 1,767  
Unamortized discount (308) $ 0
Long-term debt, net of discount 1,435 2,237
2.125% Convertible Senior Notes Due 2026    
Debt Instrument [Line Items]    
Principal 805 $ 0
Unamortized discount (308)  
Unamortized debt issuance costs (14)  
Long-term debt, net of discount 483  
Carrying amount of the equity component, net $ 305