Condensed Consolidated Statement of Shareholders' Equity Deficit (Unaudited) - 6 months ended May. 31, 2015 - USD ($) shares in Millions, $ in Millions	Total	Common Stock [Member]	Other Capital [Member]	Treasury Stock [Member]	Accumulated Deficit [Member]	Accumulated Other Comprehensive Loss [Member]
Beginning balance at Nov. 30, 2014	$ (172.5)	$ 5.9	$ 287.3	$ (64.5)	$ (67.0)	$ (334.2)
Beginning balance (in shares) at Nov. 30, 2014		56.9
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income (loss)	14.5				14.5
Amortization of actuarial losses and prior service credits, net of income taxes	24.4					24.4
Conversion of debt to common stock	35.8	$ 0.4	35.4
Conversion of debt to common stock (in shares)		4.0
Reclassification from redeemable common stock	1.5		1.5
Reclassification from redeemable common stock (in shares)		(0.1)
Tax benefit from shares issued under equity plans	1.5		1.5
Repurchase of shares to satisfy tax withholding obligations	(4.4)		(4.4)
Repurchase of shares to satisfy tax withholding obligations (in shares)		(0.2)
Stock-based compensation and other, net	3.5		3.5
Stock-based compensation and other, net (in shares)		0.7
Ending balance at May. 31, 2015	$ (95.7)	$ 6.3	$ 324.8	$ (64.5)	$ (52.5)	$ (309.8)
Ending balance, (in shares) at May. 31, 2015		61.3