Quarterly report pursuant to Section 13 or 15(d)

Retirement Benefits (Details)

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Retirement Benefits (Details) (USD $)
In Millions, unless otherwise specified
3 Months Ended
Dec. 31, 2011
Dec. 31, 2010
Defined benefit plans    
Net pension costs $ 3.1 $ 2.2
Defined Contribution Plans    
Expenses related to defined contribution plans 1.8 1.6
Pension plans
   
Defined benefit plans    
Service costs 1.5 1.3
Interest costs 3.2 3.2
Expected return on plan assets (3.4) (3.8)
Amortization of unrecognized prior service cost, net 0.2 0.2
Amortization of net loss 1.4 1.0
Net pension costs 2.9 1.9
Postretirement healthcare plan
   
Defined benefit plans    
Net pension costs $ 0.2 $ 0.3