Condensed Consolidating Financial Information - Condensed Consolidating Statements of Cash Flows (Detail) (USD $) In Millions, unless otherwise specified	12 Months Ended
	Nov. 30, 2013	Nov. 30, 2012	Nov. 30, 2011
Condensed Cash Flow Statements, Captions [Line Items]
Net cash (used in) provided by operating activities	$ 77.6	$ 86.2	$ 76.8
Cash flows from investing activities:
Capital expenditures	(63.2)	(37.2)	(21.1)
Other investing	(411.7)	0.6	26.7
Net Cash (Used in) Provided by Investing Activities	(474.9)	(36.6)	5.6
Cash flows from financing activities:
Proceeds from issuance of debt	460.0
Repayments on debt	(12.8)	(77.7)	(70.1)
Debt issuance costs	(14.9)	(1.3)	(4.2)
Net transfers (to) from parent
Other financing activities	0.5	3.5	(1.6)
Net Cash Provided by (Used in) Financing Activities	432.8	(75.5)	(75.9)
Net (decrease) increase in cash and cash equivalents	35.5	(25.9)	6.5
Cash and cash equivalents at beginning of year	162.1	188.0	181.5
Cash and cash equivalents at end of period	197.6	162.1	188.0
Parent [Member]
Condensed Cash Flow Statements, Captions [Line Items]
Net cash (used in) provided by operating activities	(2.2)	(17.8)	(33.3)
Cash flows from investing activities:
Capital expenditures
Other investing			26.7
Net Cash (Used in) Provided by Investing Activities			26.7
Cash flows from financing activities:
Proceeds from issuance of debt	460.0
Repayments on debt	(12.6)	(77.4)	(70.0)
Debt issuance costs	(14.9)	(1.3)	(4.2)
Net transfers (to) from parent	(410.5)	59.9	87.9
Other financing activities	0.5	4.3	0.3
Net Cash Provided by (Used in) Financing Activities	22.5	(14.5)	14.0
Net (decrease) increase in cash and cash equivalents	20.3	(32.3)	7.4
Cash and cash equivalents at beginning of year	172.4	204.7	197.3
Cash and cash equivalents at end of period	192.7	172.4	204.7
Guarantor Subsidiaries [Member]
Condensed Cash Flow Statements, Captions [Line Items]
Net cash (used in) provided by operating activities	67.1	95.9	105.6
Cash flows from investing activities:
Capital expenditures	(62.5)	(35.8)	(20.3)
Other investing	(411.7)	0.6
Net Cash (Used in) Provided by Investing Activities	(474.2)	(35.2)	(20.3)
Cash flows from financing activities:
Proceeds from issuance of debt
Repayments on debt	(0.2)	(0.3)	(0.1)
Debt issuance costs
Net transfers (to) from parent	412.2	(59.6)	(83.3)
Other financing activities		(0.8)	(1.9)
Net Cash Provided by (Used in) Financing Activities	412.0	(60.7)	(85.3)
Net (decrease) increase in cash and cash equivalents	4.9
Cash and cash equivalents at beginning of year
Cash and cash equivalents at end of period	4.9
Non-guarantor Subsidiaries [Member]
Condensed Cash Flow Statements, Captions [Line Items]
Net cash (used in) provided by operating activities	2.4	1.7	5.4
Cash flows from investing activities:
Capital expenditures	(0.7)	(1.4)	(0.8)
Other investing
Net Cash (Used in) Provided by Investing Activities	(0.7)	(1.4)	(0.8)
Cash flows from financing activities:
Proceeds from issuance of debt
Repayments on debt
Debt issuance costs
Net transfers (to) from parent	(1.7)	(0.3)	(4.6)
Other financing activities
Net Cash Provided by (Used in) Financing Activities	(1.7)	(0.3)	(4.6)
Net (decrease) increase in cash and cash equivalents
Cash and cash equivalents at beginning of year
Cash and cash equivalents at end of period
Eliminations [Member]
Condensed Cash Flow Statements, Captions [Line Items]
Net cash (used in) provided by operating activities	10.3	6.4	(0.9)
Cash flows from investing activities:
Capital expenditures
Other investing
Net Cash (Used in) Provided by Investing Activities
Cash flows from financing activities:
Proceeds from issuance of debt
Repayments on debt
Debt issuance costs
Net transfers (to) from parent
Other financing activities
Net Cash Provided by (Used in) Financing Activities
Net (decrease) increase in cash and cash equivalents	10.3	6.4	(0.9)
Cash and cash equivalents at beginning of year	(10.3)	(16.7)	(15.8)
Cash and cash equivalents at end of period		$ (10.3)	$ (16.7)