Debt and Credit Lines ( Debt) (Details) $ in Millions	3 Months Ended								12 Months Ended
	Nov. 30, 2016 USD ($)	Aug. 31, 2016 USD ($)	May 31, 2016 USD ($)	Feb. 29, 2016 USD ($)	Nov. 30, 2015 USD ($)	Aug. 31, 2015 USD ($)	May 31, 2015 USD ($)	Feb. 28, 2015 USD ($)	Nov. 30, 2016 USD ($)	Nov. 30, 2015 USD ($)	Nov. 30, 2014 USD ($)
Debt Instrument [Line Items]
Unused Commitment Fee, Borrowing Less Than 50%	0.375%								0.375%
Restricted cash	$ 155.9								$ 155.9
Term Loan B, Outstanding Principal and Interest									200.0
Long-term Debt	366.0				$ 357.2				366.0	$ 357.2
Capital Lease Obligations, Noncurrent	16.8				17.2				16.8	17.2
Debt Instrument, Unamortized Discount (Premium), Net	3.4				0.5				3.4	0.5
Long-term debt	358.4				354.2				358.4	354.2
Debt Instrument, Fee Amount	5.1								5.1
Write off of Deferred Debt Issuance Cost	$ 1.2	$ 1.7	$ 0.0	$ 0.0	$ 0.6	$ 0.0	$ 0.0	$ 0.0	$ 2.9	$ 0.6	$ 0.8
Line of Credit Facility, Unused Capacity, Commitment Fee Percentage									0.25%
Long-term debt, weighted-average interest rate	5.78%				6.05%				5.78%	6.05%
Term Loan B [Member]
Debt Instrument [Line Items]
Term Loan B	$ 350.0								$ 350.0
Long-term debt, interest rate	5.25%				4.25%				5.25%	4.25%
Long-term Debt	$ 349.2				$ 0.0				$ 349.2	$ 0.0
Term Loan [Member]
Debt Instrument [Line Items]
Long-term Debt	0.0				190.0				0.0	190.0
Less: current portion	$ (4.2)				$ (2.5)				(4.2)	$ (2.5)
Write off of Deferred Debt Issuance Cost									$ 1.7
Senior Unsecured Notes [Member]
Debt Instrument [Line Items]
Long-term debt, interest rate	0.00%				7.875%				0.00%	7.875%
Long-term Debt	$ 0.0				$ 150.0				$ 0.0	$ 150.0
Write off of Deferred Debt Issuance Cost									$ 1.2
Senior Secured Revolving Credit Facility [Member]
Debt Instrument [Line Items]
Line of Credit Facility, Expiration Date									Aug. 26, 2021
Line of credit, maximum potential borrowing capacity	$ 140.0								$ 140.0
Debt Instrument Covenant Fixed Charge Coverage Ratio Minimum	1.1								1.1
Line of Credit Facility, Maximum Borrowing Capacity	$ 90.0								$ 90.0
Amended Senior Secured Revolving Credit Facility [Member] [Domain]
Debt Instrument [Line Items]
Line of credit, maximum potential borrowing capacity	100.0								100.0
Minimum [Member] | Senior Secured Revolving Credit Facility [Member]
Debt Instrument [Line Items]
Line Of Credit Facility Average Unused Excess Availability									25.0
Scenario Two [Member] | Minimum [Member] | Senior Secured Revolving Credit Facility [Member]
Debt Instrument [Line Items]
Line Of Credit Facility Average Unused Excess Availability									50.0
Scenario Three [Member] | Minimum [Member] | Senior Secured Revolving Credit Facility [Member]
Debt Instrument [Line Items]
Line Of Credit Facility Average Unused Excess Availability									25.0
Commercial and Standby Letters of Credit | Senior Secured Revolving Credit Facility [Member]
Debt Instrument [Line Items]
Line of Credit Facility, Maximum Borrowing Capacity	5.0								$ 5.0
New Credit Facility [Member] | Term Loan [Member]
Debt Instrument [Line Items]
Debt Instrument, Maturity Date									Aug. 26, 2023
Annual principal payments									$ 3.5
Line Of Credit Facility Additional Borrowing Capacity	$ 85.0								$ 85.0
Debt Instrument Covenant Fixed Charge Coverage Ratio Minimum	5.0								5.0
Swingline Loans [Member] | Senior Secured Revolving Credit Facility [Member]
Debt Instrument [Line Items]
Line of Credit Facility, Maximum Borrowing Capacity	$ 10.0								$ 10.0
Base Rate [Member] | Scenario Four [Member] | Senior Secured Revolving Credit Facility [Member]
Debt Instrument [Line Items]
Interest rate, spread on variable rate									1.00%
Base Rate [Member] | Scenario Three [Member] | Senior Secured Revolving Credit Facility [Member]
Debt Instrument [Line Items]
Interest rate, spread on variable rate									0.75%
Base Rate [Member] | New Credit Facility [Member] | Term Loan [Member]
Debt Instrument [Line Items]
Interest rate, spread on variable rate									3.25%
Base Rate [Member] | New Credit Facility [Member] | Scenario Two [Member] | Senior Secured Revolving Credit Facility [Member]
Debt Instrument [Line Items]
Interest rate, spread on variable rate									0.50%
Eurodollar [Member] | Scenario Four [Member] | Senior Secured Revolving Credit Facility [Member]
Debt Instrument [Line Items]
Interest rate, spread on variable rate									2.00%
Eurodollar [Member] | Scenario Two [Member] | Senior Secured Revolving Credit Facility [Member]
Debt Instrument [Line Items]
Interest rate, spread on variable rate									1.50%
Eurodollar [Member] | Scenario Three [Member] | Senior Secured Revolving Credit Facility [Member]
Debt Instrument [Line Items]
Interest rate, spread on variable rate									1.75%
Eurodollar [Member] | New Credit Facility [Member] | Term Loan [Member]
Debt Instrument [Line Items]
Interest rate, spread on variable rate									4.25%
Federal Funds Effective Rate [Member] | New Credit Facility [Member] | Term Loan [Member]
Debt Instrument [Line Items]
Interest rate, spread on variable rate									0.50%
London Interbank Offered Rate (LIBOR) [Member] | New Credit Facility [Member] | Term Loan [Member]
Debt Instrument [Line Items]
Interest rate, spread on variable rate									1.00%
Domestic Line of Credit [Member] | Senior Secured Revolving Credit Facility [Member]
Debt Instrument [Line Items]
Letters of Credit Outstanding, Amount	0.4								$ 0.4
Line of Credit Facility, Remaining Borrowing Capacity	$ 63.0								$ 63.0