Quarterly report pursuant to Section 13 or 15(d)

Debt and Secured Revolving Facility (Narrative) (Details)

v3.20.2
Debt and Secured Revolving Facility (Narrative) (Details)
1 Months Ended 6 Months Ended
Jul. 06, 2020
USD ($)
Apr. 06, 2020
USD ($)
Jun. 07, 2019
USD ($)
Sep. 30, 2016
USD ($)
day
$ / shares
Jun. 27, 2020
USD ($)
$ / shares
Jun. 29, 2019
USD ($)
Dec. 28, 2019
USD ($)
Aug. 15, 2012
USD ($)
Debt Instrument [Line Items]                
Total debt (principal amount)         $ 763,000,000   $ 563,000,000  
Proceeds from short-term debt borrowing         200,000,000 $ 0    
Repayment of debt         $ 0 $ 234,000,000    
2.125% Convertible Senior Notes due 2026 | Convertible Debt                
Debt Instrument [Line Items]                
Stated interest rate       2.125% 2.125%   2.125%  
Principal amount       $ 805,000,000        
Threshold trading days | day       20        
Threshold consecutive trading days | day       30        
Threshold percentage of conversion price       130.00%        
Conversion price (in usd per share) | $ / shares       $ 8.00 $ 8.00      
Effective interest rate         8.00%      
Carrying amount of the equity component, net         $ 95,000,000   $ 95,000,000  
Total debt (principal amount)         $ 251,000,000   251,000,000  
7.50% Senior Notes due 2022 | Senior Notes                
Debt Instrument [Line Items]                
Stated interest rate         7.50%     7.50%
Principal amount               $ 500,000,000
Total debt (principal amount)         $ 312,000,000   $ 312,000,000  
Secured Revolving Credit Facility | Revolving Credit Facility                
Debt Instrument [Line Items]                
Effective interest rate   2.37%            
Maximum borrowing capacity     $ 500,000,000          
Debt Instrument, Term     5 years          
Debt Instrument, Available Borrowings Reduction, Asset Sales Threshold     $ 250,000,000          
Proceeds from short-term debt borrowing   $ 200,000,000            
Secured Revolving Credit Facility | Revolving Credit Facility | Subsequent Event                
Debt Instrument [Line Items]                
Repayment of debt $ 200,000,000              
Secured Revolving Credit Facility | Swingline Subfacility                
Debt Instrument [Line Items]                
Maximum borrowing capacity     50,000,000          
Secured Revolving Credit Facility | Letter of Credit                
Debt Instrument [Line Items]                
Maximum borrowing capacity     $ 75,000,000          
Letters of credit outstanding, amount         $ 13,000,000