Annual report pursuant to Section 13 and 15(d)

Retirement Benefits (Details)

v2.4.0.6
Retirement Benefits (Details) (USD $)
In Millions, unless otherwise specified
12 Months Ended
Sep. 30, 2012
item
Sep. 30, 2011
Sep. 30, 2010
Retirement Benefits      
Percentage of employee participation in the defined benefit retirement programs 55.00%    
Number of defined benefit retirement programs in which a specified percentage of employees participate 1    
Number of defined benefit retirement programs 3    
Defined benefit plans      
Net pension costs $ 12.5 $ 9.9 $ 9.5
Amounts recorded in the consolidated balance sheets:      
Accrued pension and postretirement healthcare costs, long-term portion (111.8) (108.5)  
Pension plans
     
Defined benefit plans      
Service costs 5.8 6.3 5.6
Interest costs 12.8 12.8 12.7
Expected return on plan assets (13.7) (15.4) (13.9)
Amortization of unrecognized prior service cost, net 0.9 0.9 0.9
Amortization of actuarial loss 5.7 4.0 3.0
Net pension costs 11.5 8.6 8.3
Change in benefit obligation:      
Projected benefit obligation at beginning of year 302.3 269.3  
Projected benefit obligation attributable to acquisitions   3.6  
Service costs 5.8 6.3 5.6
Interest costs 12.8 12.8 12.7
Plan amendments 0.8    
Actuarial loss 20.4 17.1  
Benefits paid (13.1) (9.5)  
Employee contributions 0.8 0.8  
Effect of exchange rates on projected benefit obligation (1.0) 1.9  
Projected benefit obligation at end of year 328.8 302.3 269.3
Change in plan assets:      
Fair value of plan assets at beginning of year 203.2 195.7  
Fair value of pension assets attributable to acquisitions   2.9  
Actual return on plan assets 34.5 9.6  
Employee and employer contributions 3.9 3.3  
Benefits paid (13.1) (9.5)  
Administrative expenses paid (1.2) (1.0)  
Effect of exchange rates on plan assets (1.0) 2.2  
Fair value of plan assets at end of year 226.3 203.2 195.7
Funded status:      
Plan assets less than benefit obligations (102.5) (99.1)  
Amounts recorded in the consolidated balance sheets:      
Other assets 0.7 0.4  
Accrued postretirement benefits, current portion (1.7) (1.6)  
Accrued pension and postretirement healthcare costs, long-term portion (101.5) (97.9)  
Plan assets less than benefit obligations (102.5) (99.1)  
Accumulated other comprehensive loss      
Net actuarial gains (losses) (92.0) (97.1)  
Prior service cost 4.3 4.4  
Aggregate tax effect 35.3 37.3  
Amount that will be amortized from accumulated other comprehensive loss into net benefit costs 8.1    
Accumulated Benefit Obligation      
Accumulated benefit obligation 312.6 288.1  
Projected benefit obligation 300.5 272.7  
Accumulated benefit obligation 286.1 263.8  
Fair value of plan assets 197.2 173.1  
Actuarial Assumptions      
Discount rate for obligation, end of year (as a percent) 3.90% 4.30% 4.80%
Discount rate for expense, during the year (as a percent) 4.30% 4.50% 5.30%
Expected rate of return on plan assets (as a percent) 6.40% 6.90% 7.60%
Rate of compensation increase (as a percent) 2.40% 2.40% 2.40%
Plan Assets      
Maximum target investment in return seeking investments as a percentage of total domestic plan assets 60.00%    
Maximum investment in any one company in the equity portfolio (as a percent) 10.00%    
Statutory limit for common stock of the reporting entity as a percentage of trust assets (as a percent) 10.00%    
Postretirement healthcare plan
     
Defined benefit plans      
Service costs 0.6 1.6  
Interest costs 0.5 0.6  
Change in benefit obligation:      
Projected benefit obligation at beginning of year 11.0 14.2  
Service costs 0.6 1.6  
Interest costs 0.5 0.6  
Actuarial loss   (5.2)  
Benefits paid (1.2) (0.2)  
Projected benefit obligation at end of year 10.9 11.0  
Change in plan assets:      
Benefits paid (1.2) (0.2)  
Amounts recorded in the consolidated balance sheets:      
Accrued postretirement benefits, current portion 0.8 0.4  
Accrued pension and postretirement healthcare costs, long-term portion 10.1 10.6  
Plan assets less than benefit obligations 10.9 11.0  
Accumulated other comprehensive loss      
Net actuarial gains (losses) 4.0 4.2  
Aggregate tax effect 1.5 1.5  
Amount that will be amortized from accumulated other comprehensive loss into net benefit costs $ 0.3    
Actuarial Assumptions      
Discount rate for obligation, end of year (as a percent) 3.40% 4.10% 4.50%