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Debt (5.875% Senior Notes Due 2024) (Details) - Senior Notes - USD ($)
12 Months Ended
Sep. 25, 2014
Dec. 31, 2019
Dec. 31, 2018
Apr. 18, 2016
Mar. 19, 2013
Debt Instrument [Line Items]          
Stated interest rate   5.125%      
5.875% Senior Notes due 2022          
Debt Instrument [Line Items]          
Debt instrument, face amount $ 250,000,000.0        
Stated interest rate 5.875% 5.875% 5.875%    
Violation or event of default, interest payment failure, term 30 days        
Violation or event of default, interest payment failure, maximum excess proceeds on sale of asset $ 25,000,000.0        
Violation or event of default, interest payment failure, failure to comply with other indenture agreements, term 60 days        
5.875% Senior Notes due 2022 | Redemption, Period 2019          
Debt Instrument [Line Items]          
Redemption price percentage 100.00%        
5.875% Senior Notes due 2022 | Redemption, Period 2020          
Debt Instrument [Line Items]          
Redemption price percentage 101.958%        
5.875% Senior Notes due 2022 | Redemption, Period 2021          
Debt Instrument [Line Items]          
Redemption price percentage 100.979%        
5.875% Senior Notes due 2022 | 2022 and thereafter          
Debt Instrument [Line Items]          
Redemption price percentage 100.00%        
5.125% Senior Notes          
Debt Instrument [Line Items]          
Debt instrument, face amount         $ 300,000,000.0
Stated interest rate   5.125% 5.125%    
5.125% Senior Notes | Redemption, Period 2020          
Debt Instrument [Line Items]          
Redemption price percentage   100.854%      
5.125% Senior Notes | Redemption, Period 2021          
Debt Instrument [Line Items]          
Redemption price percentage   100.00%      
6.00% Senior Notes          
Debt Instrument [Line Items]          
Debt instrument, face amount       $ 350,000,000.0  
Stated interest rate   6.00%      
Violation or event of default, interest payment failure, term   30 days      
Violation or event of default, interest payment failure, maximum excess proceeds on sale of asset   $ 50,000,000.0      
Violation or event of default, interest payment failure, failure to comply with other indenture agreements, term   60 days      
6.00% Senior Notes | Redemption, Period 2019          
Debt Instrument [Line Items]          
Redemption price percentage   102.00%