Retirement Benefits (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended		9 Months Ended
	Jun. 30, 2014	Jun. 30, 2013	Jun. 30, 2014	Jun. 30, 2013
Defined benefit plans
Postretirement healthcare costs, net	$ 0.1	$ 0.1	$ 0.3	$ 0.4
Expenses related to defined contribution plans	2.3	2.1	6.5	6.2
U.S. Pension Benefits
Defined benefit plans
Service costs	1.0	1.2	3.0	3.6
Interest costs	3.6	3.5	10.9	9.4
Expected return on plan assets	(3.5)	(3.6)	(10.5)	(9.6)
Amortization of unrecognized prior service costs, net	0.3	0.3	0.7	0.7
Amortization of net loss	0.9	1.8	2.8	5.4
Net pension costs	2.3	3.2	6.9	9.5
Non-U.S. Pension Benefits
Defined benefit plans
Service costs	0.4	0.4	1.2	1.2
Interest costs	1.1	0.8	3.2	2.8
Expected return on plan assets	(0.3)	0.1	(0.8)	(0.8)
Net pension costs	$ 1.2	$ 1.3	$ 3.6	$ 3.2