Share-Based Compensation (Narrative) (Details) (USD $) In Millions, except Share data, unless otherwise specified	3 Months Ended		6 Months Ended
	Mar. 31, 2014	Mar. 31, 2013	Mar. 31, 2014	Mar. 31, 2013
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Total unrecognized compensation cost related to share-based compensation arrangements	$ 6.5		$ 6.5
Remaining weighted-average period for recognition of total unrecognized compensation cost			1 year 8 months 12 days
Selling, General and Administrative Expenses [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Total share-based compensation cost	1.3	1.2	2.6	2.3
Employee Stock Option [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Pretax compensation expense	0.1	0.1	0.1	0.1
Performance-Accelerated Restricted Share Awards [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Pretax compensation expense	1.2	1.0	2.3	1.9
Non vested shares outstanding	404,692		404,692
Non-Employee Directors Plan [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Total income tax benefit recognized	0.2	0.1	0.7	0.2
Pretax compensation expense	$ 0.1	$ 0.2	$ 0.2	$ 0.3