Consolidating Guarantor And Non-Guarantor Financial Information (Schedule Of Consolidating Statement Of Operation) (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended		9 Months Ended
	Jun. 30, 2012	Jun. 30, 2011	Jun. 30, 2012	Jun. 30, 2011
Net sales	$ 275.9	$ 259.6	$ 742.8	$ 708.3
Cost of sales	196.3	186.5	548.3	525.1
Gross profit	79.6	73.1	194.5	183.2
Operating expenses:
Selling, general and administrative	53.2	48.1	150.3	140.3
Restructuring	0.7	0.3	2.0	2.4
Total operating expenses	53.9	48.4	152.3	142.7
Operating income (loss)	25.7	24.7	42.2	40.5
Interest expense, net	14.9	16.8	46.1	49.0
Loss on early extinguishment of debt	1.5	0	1.5	0
Income (loss) before income taxes	9.3	7.9	(5.4)	(8.5)
Income tax expense (benefit)	3.4	1.0	4.1	(4.3)
Equity in income (loss) of subsidiaries	0	0	0	0
Income (loss) from continuing operations	5.9	6.9	(9.5)	(4.2)
Income (loss) from discontinued operations, net of tax	3.9	(9.6)	(102.4)	(24.3)
Net income (loss)	9.8	(2.7)	(111.9)	(28.5)
Other comprehensive income (loss):
Natural gas hedges, net of tax	0.2
Interest rate swap contracts, net of tax	0.8	1.3	2.6	3.7
Foreign currency translation	(1.6)	(0.1)	0.4	3.1
Minimum pension liability, net of tax	(0.8)		0.1	20.7
Other comprehensive income (loss), net of tax	(1.4)	1.2	3.1	27.5
Comprehensive income (loss)	8.4	(1.5)	(108.8)	(1.0)
Issuer [Member]
Net sales	0	0	0	0
Cost of sales	0	0.2	0	0.1
Gross profit	0	(0.2)	0	(0.1)
Operating expenses:
Selling, general and administrative	8.1	6.9	21.8	21.8
Restructuring	0	0	(0.1)	0
Total operating expenses	8.1	6.9	21.7	21.8
Operating income (loss)	(8.1)	(7.1)	(21.7)	(21.9)
Interest expense, net	14.8	16.8	46.1	49.0
Loss on early extinguishment of debt	1.5		1.5
Income (loss) before income taxes	(24.4)	(23.9)	(69.3)	(70.9)
Income tax expense (benefit)	(9.0)	(25.6)	(17.2)	(42.0)
Equity in income (loss) of subsidiaries	21.3	5.2	42.6	24.7
Income (loss) from continuing operations	5.9	6.9	(9.5)	(4.2)
Income (loss) from discontinued operations, net of tax	3.9	(9.6)	(102.4)	(24.3)
Net income (loss)	9.8	(2.7)	(111.9)	(28.5)
Other comprehensive income (loss):
Natural gas hedges, net of tax	0.2
Interest rate swap contracts, net of tax	0.8	1.3	2.6	3.7
Foreign currency translation	0	0	0	0
Minimum pension liability, net of tax	(0.8)		0.1	20.7
Other comprehensive income (loss), net of tax	0.2	1.3	2.7	24.4
Comprehensive income (loss)	10.0	(1.4)	(109.2)	(4.1)
Guarantor Companies [Member]
Net sales	238.7	222.1	660.8	618.1
Cost of sales	167.7	155.8	483.1	448.0
Gross profit	71.0	66.3	177.7	170.1
Operating expenses:
Selling, general and administrative	40.9	37.8	117.7	109.8
Restructuring	0.6	0.2	2.0	2.0
Total operating expenses	41.5	38.0	119.7	111.8
Operating income (loss)	29.5	28.3	58.0	58.3
Interest expense, net	0.1	0	0.2	0.1
Loss on early extinguishment of debt	0		0
Income (loss) before income taxes	29.4	28.3	57.8	58.2
Income tax expense (benefit)	10.7	24.5	19.3	35.3
Equity in income (loss) of subsidiaries	2.6	1.4	4.1	1.8
Income (loss) from continuing operations	21.3	5.2	42.6	24.7
Income (loss) from discontinued operations, net of tax	0	0	0	0
Net income (loss)	21.3	5.2	42.6	24.7
Other comprehensive income (loss):
Natural gas hedges, net of tax	0
Interest rate swap contracts, net of tax	0	0	0	0
Foreign currency translation	0	0	0	0
Minimum pension liability, net of tax	0		0	0
Other comprehensive income (loss), net of tax	0	0	0	0
Comprehensive income (loss)	21.3	5.2	42.6	24.7
Non-Guarantor Companies [Member]
Net sales	37.2	37.5	82.0	90.2
Cost of sales	28.6	30.5	65.2	77.0
Gross profit	8.6	7.0	16.8	13.2
Operating expenses:
Selling, general and administrative	4.2	3.4	10.8	8.7
Restructuring	0.1	0.1	0.1	0.4
Total operating expenses	4.3	3.5	10.9	9.1
Operating income (loss)	4.3	3.5	5.9	4.1
Interest expense, net	0	0	(0.2)	(0.1)
Loss on early extinguishment of debt	0		0
Income (loss) before income taxes	4.3	3.5	6.1	4.2
Income tax expense (benefit)	1.7	2.1	2.0	2.4
Equity in income (loss) of subsidiaries	0	0	0	0
Income (loss) from continuing operations	2.6	1.4	4.1	1.8
Income (loss) from discontinued operations, net of tax	0	0	0	0
Net income (loss)	2.6	1.4	4.1	1.8
Other comprehensive income (loss):
Natural gas hedges, net of tax	0
Interest rate swap contracts, net of tax	0	0	0	0
Foreign currency translation	(1.6)	(0.1)	0.4	3.1
Minimum pension liability, net of tax	0		0	0
Other comprehensive income (loss), net of tax	(1.6)	(0.1)	0.4	3.1
Comprehensive income (loss)	1.0	1.3	4.5	4.9
Eliminations [Member]
Net sales	0	0	0	0
Cost of sales	0	0	0	0
Gross profit	0	0	0	0
Operating expenses:
Selling, general and administrative	0	0	0	0
Restructuring	0	0	0	0
Total operating expenses	0	0	0	0
Operating income (loss)	0	0	0	0
Interest expense, net	0	0	0	0
Loss on early extinguishment of debt	0		0
Income (loss) before income taxes	0	0	0	0
Income tax expense (benefit)	0	0	0	0
Equity in income (loss) of subsidiaries	(23.9)	(6.6)	(46.7)	(26.5)
Income (loss) from continuing operations	(23.9)	(6.6)	(46.7)	(26.5)
Income (loss) from discontinued operations, net of tax	0	0	0	0
Net income (loss)	(23.9)	(6.6)	(46.7)	(26.5)
Other comprehensive income (loss):
Natural gas hedges, net of tax	0
Interest rate swap contracts, net of tax	0	0	0	0
Foreign currency translation	0	0	0	0
Minimum pension liability, net of tax	0		0	0
Other comprehensive income (loss), net of tax	0	0	0	0
Comprehensive income (loss)	$ (23.9)	$ (6.6)	$ (46.7)	$ (26.5)