Separate Financial Information of Subsidiary Guarantors of Indebtedness Consolidated Statement of Comprehensive Income (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended
	Feb. 28, 2013	Feb. 29, 2012
Unrealized net change during the period	$ 2.3	$ 2.5
Tax effect	(0.2)	0
Foreign currency translations, net of tax	2.1	2.5
Amortization of unrecognized gain on interest rate swap reclassified into interest expense	0	0.7
Tax effect	0	(0.3)
Interest rate swap, net of tax	0	0.4
Other Comprehensive Income (Loss), Reclassification, Pension and Other Postretirement Benefit Plans, Net Gain (Loss) Recognized in Net Periodic Benefit Cost, before Tax	0.8	0.4
Amortization of prior service costs included in net period pension expense	0.1	(0.1)
Tax effect in defined benefit plans	(0.4)	(0.1)
Defined benefit plans, net of tax	0.5	0.2
Other comprehensive income , net of tax	2.6	3.1
Comprehensive Income	2.4	16.6
Net Income (loss)	(0.2)	13.5
OMNOVA Solutions (Parent)
Other comprehensive income , net of tax	2.6	3.1
Comprehensive Income	2.4	16.6
Net Income (loss)	(0.2)	13.5
Guarantor Subsidiaries
Other comprehensive income , net of tax	1.6	6.3
Comprehensive Income	1.8	10.8
Net Income (loss)	0.2	4.5
Non-Guarantor Subsidiaries
Other comprehensive income , net of tax	1.2	1.1
Comprehensive Income	1.8	6.3
Net Income (loss)	0.6	5.2
Eliminations
Other comprehensive income , net of tax	(2.8)	(7.4)
Comprehensive Income	(3.6)	(17.1)
Net Income (loss)	$ (0.8)	$ (9.7)