Long-Term Debt - Schedule of Maturities of Long-term Debt (Details) - USD ($) $ in Millions		Nov. 30, 2015	Nov. 30, 2014
Debt Instrument [Line Items]
Total debt, carrying amount		$ 652.0	$ 782.2
2016		5.3
2017		5.1
2018		5.0
2019		79.0
2020		84.6
2021		460.0
2022		13.0
Senior Debt [Member]
Debt Instrument [Line Items]
Total debt, carrying amount		93.8
2016		5.0
2017		5.0
2018		5.0
2019		78.8
2020		0.0
2021		0.0
2022		0.0
Senior Secured Notes [Member]
Debt Instrument [Line Items]
Total debt, carrying amount		460.0
2016		0.0
2017		0.0
2018		0.0
2019		0.0
2020		0.0
2021		460.0
2022		0.0
Convertible Subordinated Notes [Member]
Debt Instrument [Line Items]
Total debt, carrying amount	[1]	84.8
2016	[1]	0.0
2017	[1]	0.0
2018	[1]	0.0
2019	[1]	0.2
2020	[1]	84.6
2021	[1]	0.0
2022	[1]	0.0
Other Debt [Member]
Debt Instrument [Line Items]
Total debt, carrying amount		13.4
2016		0.3
2017		0.1
2018		0.0
2019		0.0
2020		0.0
2021		0.0
2022		$ 13.0

[1] With respect to the 4 1/16% Debentures holders option to require the Company to repurchase all of the outstanding 4 1/16% Debentures, or any portion thereof that is a multiple of $1,000 principal amount, on December 31, 2019, the Company has the unilateral option to pay the 4 1/16% Debentures holders in shares of its common stock.