Annual report pursuant to Section 13 and 15(d)

Debt, Secured Revolving Facility and Secured Revolving Line of Credit (Details) (Summary of Debt and Other Obligations)

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Debt, Secured Revolving Facility and Secured Revolving Line of Credit (Details) (Summary of Debt and Other Obligations) - USD ($)
$ in Millions
Dec. 28, 2019
Sep. 28, 2019
Dec. 29, 2018
Dec. 30, 2017
Dec. 31, 2016
Sep. 14, 2016
Dec. 27, 2014
Jun. 16, 2014
Feb. 26, 2014
Aug. 15, 2012
Debt Instrument [Line Items]                    
Long-term debt, gross $ 563   $ 1,528              
Unamortized debt discount associated with 2.125% Notes (73)   (262)              
Unamortized debt issuance costs (4)   (16)              
Total debt (net) 486   1,250              
Less: current portion 0   (136)              
Total debt, less current portion 486   1,114              
Secured Revolving Line of Credit                    
Debt Instrument [Line Items]                    
Long-term debt, gross $ 0   $ 70              
6.75% Notes                    
Debt Instrument [Line Items]                    
Interest rate, stated percentage 6.75%   6.75% 6.75% 6.75%       6.75%  
7.50% Notes                    
Debt Instrument [Line Items]                    
Interest rate, stated percentage 7.50%   7.50% 7.50% 7.50%   7.50%     7.50%
Long-term debt, gross $ 312   $ 337              
7.00% Notes                    
Debt Instrument [Line Items]                    
Interest rate, stated percentage 7.00%   7.00% 7.00% 7.00%     7.00%    
Long-term debt, gross $ 0   $ 250              
2.125% Notes                    
Debt Instrument [Line Items]                    
Interest rate, stated percentage 2.125% 2.125%       2.125%        
Long-term debt, gross $ 251   $ 805