Consolidated Statement of Shareholders' Deficit and Comprehensive Income (Loss) (USD $) In Millions, except Share data	Total	Comprehensive Income (Loss)	Common Stock	Other Capital	Accumulated Deficit	Accumulated Other Comprehensive Loss
Beginning Balance at Nov. 30, 2008	$ (11.8)		$ 5.7	$ 255.0	$ (240.8)	$ (31.7)
Beginning Balance, shares at Nov. 30, 2008			57,253,401
Net income	52.2	52.2			52.2
Amortization of net actuarial gains/losses	(9.0)	(9.0)				(9.0)
Actuarial gains/losses arising during the period, net	(313.4)	(313.4)				(313.4)
Amortization of prior service costs	0.1	0.1				0.1
Reclassification from redeemable common stock	1.6		0.1	1.5
Reclassification from redeemable common stock, shares			183,105
Stock-based compensation	0.1			0.1
Cumulative effect adjustment related to the adoption of new defined benefit pension plan accounting standard	(0.2)				(0.4)	0.2
Stock-based compensation and shares issued under equity and performance incentive plans	1.5		0.1	1.4
Stock-based compensation and shares issued under equity and performance incentive plans, shares			487,257
Ending Balance at Nov. 30, 2009	(278.9)	(270.1)	5.9	258.0	(189.0)	(353.8)
Ending Balance, shares at Nov. 30, 2009			57,923,763
Net income	6.8	6.8			6.8
Amortization of net actuarial gains/losses	54.9	54.9				54.9
Actuarial gains/losses arising during the period, net	17.6	17.6				17.6
Amortization of prior service costs	0.1	0.1				0.1
Reclassification from redeemable common stock	0.9			0.9
Reclassification from redeemable common stock, shares			88,833
Repurchase of convertible debt	(2.9)			(2.9)
Stock-based compensation and shares issued under equity and performance incentive plans	1.3			1.3
Stock-based compensation and shares issued under equity and performance incentive plans, shares			81,847
Ending Balance at Nov. 30, 2010	(200.2)	79.4	5.9	257.3	(182.2)	(281.2)
Ending Balance, shares at Nov. 30, 2010			58,094,443
Net income	2.9	2.9			2.9
Amortization of net actuarial gains/losses	62.8	62.8				62.8
Actuarial gains/losses arising during the period, net	(81.1)	(81.1)				(81.1)
Amortization of prior service costs	0.1	0.1				0.1
Reclassification from redeemable common stock	0.7			0.7
Reclassification from redeemable common stock, shares			61,296
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 and performance incentive plans	3.3			3.3
Stock-based compensation and shares issued under equity and performance incentive plans, shares			200,111
Ending Balance at Nov. 30, 2011	$ (211.6)	$ (15.3)	$ 5.9	$ 261.2	$ (179.3)	$ (299.4)
Ending Balance, shares at Nov. 30, 2011			58,355,850