Supplemental Balance Sheet Information (Details) (USD $) In Millions, unless otherwise specified	Mar. 31, 2014	Sep. 30, 2013
Supplemental Balance Sheet Information
Trade accounts receivable reserves	$ 19.0	$ 19.3
Accumulated depreciation on property, plant, and equipment	276.2	268.0
Accumulated amortization on intangible assets	118.3	99.6
Inventories
Raw materials and components	55.9	58.3
Work in process	81.2	74.8
Finished goods	46.0	44.4
Total inventories	$ 183.1	$ 177.5