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Supplemental Disclosure of Noncash Investing and Financing Activities (Details Textual) - USD ($) $ in Millions	3 Months Ended
	Apr. 30, 2018	Jan. 31, 2018	Oct. 31, 2020	Mar. 25, 2020	Jan. 31, 2020	Dec. 10, 2019	Nov. 01, 2019	Oct. 31, 2019	Jan. 15, 2019	May 29, 2018	Feb. 01, 2018
Fair Value of Assets Acquired		$ 13.0
Accounting Standards Update 2016-02 [Member]
Operating Lease, Right-of-Use Asset					$ 23.3		$ 23.3
Operating Lease, Liability, Total					$ 24.4		$ 24.4
The 8.0% Senior Notes Due 2019 [Member]
Debt Conversion, Original Debt, Interest Rate of Debt	8.00%
Debt Instrument, Interest Rate, Stated Percentage										8.00%	8.00%
Debt Instrument, Face Amount											$ 170.2
The 13.5% Senior Notes Due 2026 [Member]
Debt Conversion, Original Debt, Interest Rate of Debt	13.50%
Debt Instrument, Interest Rate, Stated Percentage											13.50%
Debt Instrument, Face Amount											$ 90.6
The 5.0% Senior Notes due 2040 [Member]
Debt Conversion, Original Debt, Interest Rate of Debt	5.00%
Debt Instrument, Interest Rate, Stated Percentage											5.00%
Debt Instrument, Face Amount											$ 90.1
The 10.0% 2022 Notes [Member] | Senior Secured Notes [Member]
Debt Instrument, Interest Rate, Stated Percentage			10.00%	10.00%	10.00%	10.00%		10.00%
Debt Instrument Exchanged, Face Amount				$ 59.1	$ 23.2	$ 23.2
The 10.5% 2024 Notes [Member] | Senior Secured Notes [Member]
Debt Instrument, Interest Rate, Stated Percentage			10.50%		10.50%	10.50%		10.50%	10.50%
Debt Instrument, Face Amount									$ 25.0
Debt Instrument Exchanged, Face Amount					$ 141.7	$ 141.7
The 7.75% Senior Secured 1.125 Lien Notes due February 15, 2026 [Member] | Senior Secured Notes [Member]
Debt Instrument, Interest Rate, Stated Percentage			7.75%					7.75%
Debt Instrument, Face Amount								$ 350.0
The 11.25% Senior Secured 1.5 Lien Notes due February 15, 2026 [Member]
Debt Instrument, Interest Rate, Stated Percentage				11.25%				11.25%
Debt Instrument, Exchange, Amount Issued				$ 59.1
The 11.25% Senior Secured 1.5 Lien Notes due February 15, 2026 [Member] | Senior Secured Notes [Member]
Debt Instrument, Interest Rate, Stated Percentage			11.25%					11.25%
Debt Instrument Exchanged, Face Amount								$ 103.1
The 10.0% Senior Secured 1.75 Lien Notes due 2025 [Member] | Senior Secured Notes [Member]
Debt Instrument, Interest Rate, Stated Percentage			10.00%		10.00%	10.00%		10.00%
Debt Instrument, Face Amount					$ 158.5	$ 158.5
Senior Unsecured Term Loan Credit Facility [Member]
Debt Instrument Exchanged, Face Amount					163.0	163.0
The 10.0% Senior Secured 1.75 Lien Term Loans Due 2028 [Member]
Debt Instrument, Face Amount					$ 81.5	$ 81.5

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