Property, Plant and Equipment (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Jun. 30, 2016	Jun. 30, 2015	Jun. 30, 2016	Jun. 30, 2015	Sep. 30, 2015
Property, plant and equipment
Property, plant and equipment, gross	$ 1,134.3		$ 1,134.3		$ 1,093.7
Less accumulated depreciation	(655.2)		(655.2)		(617.9)
Property, plant and equipment, net	479.1		479.1		475.8
Depreciation expenses	18.4	$ 16.1	54.2	$ 48.4
Land and land improvements
Property, plant and equipment
Property, plant and equipment, gross	57.3		57.3		57.5
Buildings
Property, plant and equipment
Property, plant and equipment, gross	277.6		277.6		274.8
Machinery and equipment
Property, plant and equipment
Property, plant and equipment, gross	728.1		728.1		681.1
Equipment on operating lease to others
Property, plant and equipment
Property, plant and equipment, gross	42.4		42.4		42.2
Equipment on operating lease, net	34.4		$ 34.4		33.9
Equipment on operating lease to others | Minimum
Property, plant and equipment
Estimated useful life (in years)			5 years
Equipment on operating lease to others | Maximum
Property, plant and equipment
Estimated useful life (in years)			10 years
Construction in progress
Property, plant and equipment
Property, plant and equipment, gross	$ 28.9		$ 28.9		$ 38.1