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Debt - Schedule of Debt (Detail) - USD ($)
Dec. 31, 2018
Dec. 31, 2017
Sep. 30, 2016
Debt Instrument [Line Items]      
Credit Agreement     $ 0
Other [1] $ 38,900,000 $ 10,800,000  
Unamortized debt issuance costs (16,300,000) (11,600,000)  
Total debt 2,091,500,000 2,109,700,000  
Less: current portion (216,200,000) (10,800,000)  
Long-term debt 1,875,300,000 2,098,900,000  
11.25% Senior Notes Due February 1, 2019      
Debt Instrument [Line Items]      
Senior notes [2] 172,200,000 172,200,000  
7.625% Senior Notes Due June 15, 2020      
Debt Instrument [Line Items]      
Senior notes 65,800,000 238,400,000  
7.875% Senior Notes Due March 15, 2021      
Debt Instrument [Line Items]      
Senior notes 190,400,000 447,200,000  
8.875% Debentures Due April 15, 2021      
Debt Instrument [Line Items]      
Debentures 81,000,000 80,900,000  
7.00% Senior Notes Due February 15, 2022      
Debt Instrument [Line Items]      
Senior notes 140,000,000 140,000,000  
6.50% Senior Notes Due November 15, 2023      
Debt Instrument [Line Items]      
Senior notes 290,600,000 290,600,000  
6.00% Senior Notes Due April 1, 2024      
Debt Instrument [Line Items]      
Senior notes 298,300,000 298,300,000  
6.625% Debentures Due April 15, 2029      
Debt Instrument [Line Items]      
Debentures 157,900,000 157,900,000  
8.820% Debentures Due April 15, 2031      
Debt Instrument [Line Items]      
Debentures 69,000,000 69,000,000  
ABL Credit Agreement      
Debt Instrument [Line Items]      
Credit Agreement 59,000,000 $ 216,000,000  
Term Loan Credit Agreement Due January 15, 2024      
Debt Instrument [Line Items]      
Credit Agreement [3] $ 544,700,000    
[1] Includes miscellaneous debt obligations and capital leases.
[2] As of December 31, 2018 and 2017, the interest rate on the 11.25% senior notes due February 1, 2019 was 13.25%, the maximum amount of these rates as a result of credit ratings downgrades.
[3] As of December 31, 2018, the interest rate on the Term Loan Credit Agreement due January 15, 2024 was 7.51%.