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Chapter 11 Proceedings and Ability to continue as a Going Concern - Payments due on Certain Indebtedness and Forbearance Agreements (Details) - USD ($)
$ in Millions
3 Months Ended
Jul. 01, 2019
Jun. 15, 2019
Sep. 30, 2019
Senior Notes      
Debt Instrument [Line Items]      
Interest payment on debt   $ 69.0  
Senior Notes | Senior Notes, 7.75 Percent due 2021      
Debt Instrument [Line Items]      
Stated interest rate on debt   7.75% 7.75%
Senior Notes | Senior Notes, 8.25 Percent due 2023      
Debt Instrument [Line Items]      
Stated interest rate on debt   8.25% 8.25%
Senior Notes | Senior Notes, 6.80% due 2037      
Debt Instrument [Line Items]      
Stated interest rate on debt   6.80% 6.80%
Term Loan Agreement      
Debt Instrument [Line Items]      
Quarterly payment on debt     $ 12.5
Forbearance Agreement      
Debt Instrument [Line Items]      
Ratable account fee, percentage 0.25%    
Maximum exposure under the credit agreement $ 100.0