Business Segment Information (Details 2) - USD ($) $ in Millions	3 Months Ended
	Dec. 31, 2016	Dec. 31, 2015
Net sales:
Net sales	$ 1,211.4	$ 1,252.0
Operating income (loss) from continuing operations:
Operating income (loss):	36.2	30.3
Interest expense, net of interest income	(13.9)	(14.1)
Miscellaneous other income	1.3	0.0
Income before income taxes and equity in earnings of unconsolidated affiliates	23.6	16.2
Access Equipment
Net sales:
Net sales	489.2	529.8
Operating income (loss) from continuing operations:
Operating income (loss):	24.4	20.4
Access Equipment | Aerial work platforms
Net sales:
Net sales	233.7	242.0
Access Equipment | Telehandlers
Net sales:
Net sales	93.3	111.8
Access Equipment | Other
Net sales:
Net sales	162.2	176.0
Defense
Net sales:
Net sales	294.2	316.9
Operating income (loss) from continuing operations:
Operating income (loss):	23.8	23.2
Fire & Emergency
Net sales:
Net sales	229.1	205.4
Operating income (loss) from continuing operations:
Operating income (loss):	17.0	10.1
Commercial
Net sales:
Net sales	198.1	199.9
Operating income (loss) from continuing operations:
Operating income (loss):	4.6	8.9
Commercial | Concrete placement
Net sales:
Net sales	84.4	72.3
Commercial | Refuse collection
Net sales:
Net sales	92.2	99.0
Commercial | Other
Net sales:
Net sales	21.5	28.6
Intersegment eliminations
Net sales:
Net sales	0.8	0.0
Operating Segments
Net sales:
Net sales	1,211.4	1,252.0
Operating Segments | Access Equipment
Net sales:
Net sales	489.2	529.8
Operating Segments | Access Equipment | Aerial work platforms
Net sales:
Net sales	233.7	242.0
Operating Segments | Access Equipment | Telehandlers
Net sales:
Net sales	93.3	111.8
Operating Segments | Access Equipment | Other
Net sales:
Net sales	162.2	176.0
Operating Segments | Defense
Net sales:
Net sales	294.5	318.0
Operating Segments | Fire & Emergency
Net sales:
Net sales	232.5	207.5
Operating Segments | Commercial
Net sales:
Net sales	199.2	200.3
Operating Segments | Commercial | Concrete placement
Net sales:
Net sales	84.4	72.3
Operating Segments | Commercial | Refuse collection
Net sales:
Net sales	92.2	99.0
Operating Segments | Commercial | Other
Net sales:
Net sales	22.6	29.0
Operating Segments | Intersegment eliminations
Net sales:
Net sales	(4.0)	(3.6)
Intersegment eliminations
Net sales:
Net sales	0.0	0.0
Operating income (loss) from continuing operations:
Operating income (loss):	0.0	0.0
Intersegment eliminations | Access Equipment
Net sales:
Net sales	0.0	0.0
Intersegment eliminations | Access Equipment | Aerial work platforms
Net sales:
Net sales	0.0	0.0
Intersegment eliminations | Access Equipment | Telehandlers
Net sales:
Net sales	0.0	0.0
Intersegment eliminations | Access Equipment | Other
Net sales:
Net sales	0.0	0.0
Intersegment eliminations | Defense
Net sales:
Net sales	0.3	1.1
Intersegment eliminations | Fire & Emergency
Net sales:
Net sales	3.4	2.1
Intersegment eliminations | Commercial
Net sales:
Net sales	1.1	0.4
Intersegment eliminations | Commercial | Concrete placement
Net sales:
Net sales	0.0	0.0
Intersegment eliminations | Commercial | Refuse collection
Net sales:
Net sales	0.0	0.0
Intersegment eliminations | Commercial | Other
Net sales:
Net sales	1.1	0.4
Intersegment eliminations | Intersegment eliminations
Net sales:
Net sales	(4.8)	(3.6)
Corporate, non-segment
Operating income (loss) from continuing operations:
Operating income (loss):	$ (33.6)	$ (32.3)