Income Taxes (Details 3) - USD ($) $ in Millions	12 Months Ended
	Sep. 30, 2016	Sep. 30, 2015
Tax Attributes, Tax Benefit Amount [Abstract]
Capital loss carryforward	$ 9.9	$ 13.6
Net operating loss carryforwards	24.4	25.9
Tax credit carryforward	13.7	8.5
Subtotal - tax carryforwards	48.0
Other deferred tax assets	0.6
Total	48.6
Tax Attributes, Valuation Allowance [Abstract]
Subtotal - tax carryforwards	16.7
Other deferred tax assets	0.6
Total	17.3	$ 22.2
Non-United States [Member]
Tax Attributes, Tax Benefit Amount [Abstract]
Net operating loss carryforward, subject to expiration	7.7
Net operating loss carryforward, not subject to expiration	6.1
Capital loss carryforward	9.9
Tax Attributes, Valuation Allowance [Abstract]
Net operating loss carryforward, subject to expiration	4.4
Net operating loss carryforward, not subject to expiration	1.6
Capital loss carryforward	$ 9.9
Non-United States [Member] | Minimum [Member]
Tax Attributes, Tax Benefit Amount [Abstract]
Net operating loss carryforward, carryforward period ends	Sep. 30, 2017
Non-United States [Member] | Maximum [Member]
Tax Attributes, Tax Benefit Amount [Abstract]
Net operating loss carryforward, carryforward period ends	Sep. 30, 2026
United States [Member]
Tax Attributes, Tax Benefit Amount [Abstract]
Net operating loss carryforwards	$ 2.8
Tax credit carryforward	2.5
Tax Attributes, Valuation Allowance [Abstract]
Net operating loss carryforward, subject to expiration	0.0
Tax credit carryforward	$ 0.0
United States [Member] | Minimum [Member]
Tax Attributes, Tax Benefit Amount [Abstract]
Net operating loss carryforward, carryforward period ends	Sep. 30, 2019
Tax credit carryforward, carryforward period ends	Sep. 30, 2018
United States [Member] | Maximum [Member]
Tax Attributes, Tax Benefit Amount [Abstract]
Net operating loss carryforward, carryforward period ends	Sep. 30, 2033
Tax credit carryforward, carryforward period ends	Sep. 30, 2037
State and Local [Member]
Tax Attributes, Tax Benefit Amount [Abstract]
Net operating loss carryforwards	$ 7.8
Tax credit carryforward	11.2
Tax Attributes, Valuation Allowance [Abstract]
Net operating loss carryforward, subject to expiration	0.2
Tax credit carryforward	$ 0.6
State and Local [Member] | Minimum [Member]
Tax Attributes, Tax Benefit Amount [Abstract]
Net operating loss carryforward, carryforward period ends	Sep. 30, 2017
Tax credit carryforward, carryforward period ends	Sep. 30, 2019
State and Local [Member] | Maximum [Member]
Tax Attributes, Tax Benefit Amount [Abstract]
Net operating loss carryforward, carryforward period ends	Sep. 30, 2033
Tax credit carryforward, carryforward period ends	Sep. 30, 2031