Condensed Consolidating Financial Information - Condensed Consolidating Statements of Cash Flows (Detail) (USD $) In Millions, unless otherwise specified	3 Months Ended
	Feb. 28, 2014	Feb. 28, 2013
Condensed Cash Flow Statements, Captions [Line Items]
Net cash provided by (used in) operating activities	$ (25.3)	$ 6.9
Cash flows from investing activities:
Capital expenditures	(9.3)	(9.1)
Other investing activities		(466.5)
Net Cash Used in Investing Activities	(9.3)	(475.6)
Cash flows from financing activities:
Repayments on debt	(10.0)	(0.6)
Proceeds from issuance of debt		460.0
Debt issuance costs		(12.3)
Net transfers (to) from parent
Other financing activities	(8.9)	0.2
Net Cash (Used in) Provided by Financing Activities	(18.9)	447.3
Net Decrease in Cash and Cash Equivalents	(53.5)	(21.4)
Cash and Cash Equivalents at Beginning of Period	197.6	162.1
Cash and Cash Equivalents at End of Period	144.1	140.7
Parent [Member]
Condensed Cash Flow Statements, Captions [Line Items]
Net cash provided by (used in) operating activities	51.2	13.0
Cash flows from investing activities:
Capital expenditures
Other investing activities		(466.1)
Net Cash Used in Investing Activities		(466.1)
Cash flows from financing activities:
Repayments on debt	(10.0)	(0.6)
Proceeds from issuance of debt		460.0
Debt issuance costs		(12.3)
Net transfers (to) from parent	(81.2)	(20.5)
Other financing activities	(8.9)	0.2
Net Cash (Used in) Provided by Financing Activities	(100.1)	426.8
Net Decrease in Cash and Cash Equivalents	(48.9)	(26.3)
Cash and Cash Equivalents at Beginning of Period	192.7	172.4
Cash and Cash Equivalents at End of Period	143.8	146.1
Guarantor Subsidiaries [Member]
Condensed Cash Flow Statements, Captions [Line Items]
Net cash provided by (used in) operating activities	(76.2)	(11.0)
Cash flows from investing activities:
Capital expenditures	(8.9)	(9.0)
Other investing activities		(0.4)
Net Cash Used in Investing Activities	(8.9)	(9.4)
Cash flows from financing activities:
Repayments on debt
Proceeds from issuance of debt
Debt issuance costs
Net transfers (to) from parent	80.2	20.4
Other financing activities
Net Cash (Used in) Provided by Financing Activities	80.2	20.4
Net Decrease in Cash and Cash Equivalents	(4.9)
Cash and Cash Equivalents at Beginning of Period	4.9
Cash and Cash Equivalents at End of Period
Non-guarantor Subsidiaries [Member]
Condensed Cash Flow Statements, Captions [Line Items]
Net cash provided by (used in) operating activities	(0.3)
Cash flows from investing activities:
Capital expenditures	(0.4)	(0.1)
Net Cash Used in Investing Activities	(0.4)	(0.1)
Cash flows from financing activities:
Repayments on debt
Proceeds from issuance of debt
Debt issuance costs
Net transfers (to) from parent	1.0	0.1
Other financing activities
Net Cash (Used in) Provided by Financing Activities	1.0	0.1
Net Decrease in Cash and Cash Equivalents	0.3
Cash and Cash Equivalents at Beginning of Period
Cash and Cash Equivalents at End of Period	0.3
Eliminations [Member]
Condensed Cash Flow Statements, Captions [Line Items]
Net cash provided by (used in) operating activities		4.9
Cash flows from investing activities:
Capital expenditures
Other investing activities
Net Cash Used in Investing Activities
Cash flows from financing activities:
Repayments on debt
Proceeds from issuance of debt
Debt issuance costs
Net transfers (to) from parent
Other financing activities
Net Cash (Used in) Provided by Financing Activities
Net Decrease in Cash and Cash Equivalents		4.9
Cash and Cash Equivalents at Beginning of Period		(10.3)
Cash and Cash Equivalents at End of Period		$ (5.4)