Annual report pursuant to Section 13 and 15(d)

Debt and Other Obligations (Details) (Summary of Debt and Other Obligations)

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Debt and Other Obligations (Details) (Summary of Debt and Other Obligations) - USD ($)
Dec. 30, 2017
Dec. 31, 2016
Sep. 14, 2016
Jun. 16, 2014
Feb. 26, 2014
Aug. 15, 2012
Debt Instrument [Line Items]            
Long-term debt, gross $ 1,629,000,000          
Secured Revolving Line of Credit [1],[2] 70,000,000 $ 0        
Total debt (principal amount) 1,699,000,000 1,767,000,000        
Unamortized debt discount (286,000,000) (308,000,000)        
Unamortized debt issuance costs (19,000,000) (25,000,000)        
Other 1,000,000 1,000,000        
Total debt (net) 1,395,000,000 1,435,000,000        
Long-term debt, less current portion [1],[2] 1,325,000,000 1,435,000,000        
Secured Revolving Line of Credit            
Debt Instrument [Line Items]            
Secured Revolving Line of Credit $ 70,000,000 0        
6.75% Senior Notes due 2019            
Debt Instrument [Line Items]            
Interest rate, stated percentage 6.75%       6.75%  
Long-term debt, gross $ 166,000,000 $ 196,000,000        
7.50% Senior Notes due 2022            
Debt Instrument [Line Items]            
Interest rate, stated percentage 7.50% 7.50%       7.50%
Long-term debt, gross $ 347,000,000 $ 350,000,000        
7.00% Senior Notes due 2024            
Debt Instrument [Line Items]            
Interest rate, stated percentage 7.00% 7.00%   7.00%    
Long-term debt, gross $ 311,000,000 $ 416,000,000        
2.125% Convertible Senior Notes Due 2026            
Debt Instrument [Line Items]            
Interest rate, stated percentage 2.125% 2.125% 2.125%      
Long-term debt, gross $ 805,000,000 $ 805,000,000        
Unamortized debt discount (286,000,000) (308,000,000)        
Total debt (net) $ 507,000,000 $ 483,000,000        
[1] Amounts reflected adoption of FASB ASU 2015-03, Simplifying the Presentation of Debt Issuance Costs beginning in the first quarter of 2016.
[2] Amounts reflected adoption of FASB ASU 2015-17, Balance Sheet Classification of Deferred Taxes beginning in the first quarter of 2016.