Consolidated Statements of Shareholders' Equity (Deficit) (USD $) In Millions	Total	Common Stock [Member]	Other Capital [Member]	Accumulated Deficit [Member]	Accumulated Other Comprehensive Loss [Member]
Beginning balance at Nov. 30, 2010	$ (200.2)	$ 5.9	$ 257.3	$ (182.2)	$ (281.2)
Beginning balance, shares at Nov. 30, 2010		58.1
Net income	2.9			2.9
Amortization of net actuarial losses	62.8				62.8
Actuarial (losses) gains arising during the period, net	(81.1)				(81.1)
Amortization of prior service costs	0.1				0.1
Reclassification from redeemable common stock	0.7		0.7
Reclassification from redeemable common stock, shares		0.1
Tax benefit from shares issued under equity and performance incentive plans	0.2		0.2
Repurchase of convertible debt	(0.3)		(0.3)
Stock-based compensation and shares issued under equity plan	3.3		3.3
Stock-based compensation and shares issued under equity plan, shares		0.2
Ending balance at Nov. 30, 2011	(211.6)	5.9	261.2	(179.3)	(299.4)
Ending balance, shares at Nov. 30, 2011		58.4
Net income	(2.6)			(2.6)
Amortization of net actuarial losses	58.9				58.9
Actuarial (losses) gains arising during the period, net	(245.7)				(245.7)
Amortization of prior service costs	(0.1)				(0.1)
Reclassification from redeemable common stock	0.5		0.5
Tax benefit from shares issued under equity and performance incentive plans	3.3		3.3
Stock-based compensation and shares issued under equity plan	4.6		4.6
Stock-based compensation and shares issued under equity plan, shares		0.5
Ending balance at Nov. 30, 2012	(392.7)	5.9	269.6	(181.9)	(486.3)
Ending balance, shares at Nov. 30, 2012		58.9
Net income	167.9			167.9
Amortization of net actuarial losses	91.3				91.3
Actuarial (losses) gains arising during the period, net	173.5				173.5
Amortization of prior service costs	(0.9)				(0.9)
Conversion of debt to common stock	1.6		1.6
Conversion of debt to common stock, shares		0.2
Reclassification from redeemable common stock	3.7		3.7
Reclassification from redeemable common stock, shares		0.4
Stock-based compensation and shares issued under equity plan	5.2		5.2
Stock-based compensation and shares issued under equity plan, shares		0.4
Ending balance at Nov. 30, 2013	$ 49.6	$ 5.9	$ 280.1	$ (14.0)	$ (222.4)
Ending balance, shares at Nov. 30, 2013		59.9