Annual report pursuant to Section 13 and 15(d)

Retirement Benefits (Details)

v3.5.0.2
Retirement Benefits (Details)
 1 Months Ended 12 Months Ended
Sep. 30, 2015
USD ($)
Sep. 30, 2016
USD ($)
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Sep. 30, 2015
USD ($)
Sep. 30, 2014
USD ($)
Retirement and Postemployment Benefits        
Percentage of employee participation in the defined benefit retirement programs   46.00%    
Number of defined benefit retirement programs in which a specified percentage of employees participate | program   1    
Number of defined benefit retirement programs | program   4    
Pension Expense   $ 0 $ 17,700,000 $ 0
Amounts recorded in the consolidated balance sheets:        
Accrued pension costs, long-term portion $ 218,700,000 $ 232,700,000 218,700,000  
Plan Assets        
Reporting entity's common stock owned by trust (in shares) | shares   0    
Pension Plans Defined Benefit        
Accumulated other comprehensive loss        
Net actuarial gains (losses) 86,400,000 $ (103,400,000) 86,400,000  
Prior service cost (1,500,000) 1,600,000 (1,500,000)  
Aggregate tax effect (30,800,000) (35,200,000) (30,800,000)  
Amount that will be amortized from accumulated other comprehensive loss into net benefit costs   6,700,000    
Accumulated Benefit Obligation        
Accumulated benefit obligation 390,100,000 414,700,000 390,100,000  
U.S. Pension Benefits        
Retirement and Postemployment Benefits        
Decrease in projected obligation 81,900,000      
Defined benefit plans        
Service cost   3,900,000 4,300,000 4,000,000
Interest cost   9,500,000 14,400,000 14,500,000
Expected return on plan assets   (9,700,000) (14,300,000) (14,000,000)
Amortization of unrecognized prior service cost, net   600,000 900,000 900,000
Amortization of actuarial loss   3,800,000 5,300,000 3,800,000
Settlement expense 17,700,000 0 17,700,000 0
Net pension costs   8,100,000 28,300,000 9,200,000
Change in benefit obligation:        
Projected benefit obligation at beginning of year   272,200,000 338,500,000  
Service cost   3,900,000 4,300,000 4,000,000
Interest cost   9,500,000 14,400,000 14,500,000
Amendments   0 0  
Actuarial loss (gain)   19,700,000 10,000,000  
Benefits paid (75,900,000) (11,100,000) (89,000,000)  
Gain due to settlement   0 (6,000,000)  
Employee contributions   0 0  
Effect of exchange rates on projected benefit obligation   0 0  
Projected benefit obligation at end of year 272,200,000 294,200,000 272,200,000 338,500,000
Change in plan assets:        
Fair value of plan assets at beginning of year   158,900,000 249,700,000  
Actual return on plan assets   19,100,000 (8,600,000)  
Employee and employer contributions   6,800,000 6,800,000  
Benefits paid (75,900,000) (11,100,000) (89,000,000)  
Effect of exchange rates on plan assets   0 0  
Fair value of plan assets at end of year 158,900,000 173,700,000 158,900,000 $ 249,700,000
Funded status:        
Plan assets less than benefit obligations (113,300,000) (120,500,000) (113,300,000)  
Amounts recorded in the consolidated balance sheets:        
Accrued pension costs, current portion 1,800,000 1,800,000 1,800,000  
Accrued pension costs, long-term portion 111,500,000 118,700,000 111,500,000  
Plan assets less than benefit obligations (113,300,000) (120,500,000) (113,300,000)  
Accumulated Benefit Obligation        
Projected benefit obligation 272,200,000 294,200,000 272,200,000  
Accumulated benefit obligation 258,900,000 276,500,000 258,900,000  
Fair value of plan assets $ 158,900,000 $ 173,700,000 $ 158,900,000  
Actuarial Assumptions        
Discount rate for obligation, end of year (as a percent) 4.40% 3.60% 4.40% 4.40%
Discount rate for expense, during the year (as a percent)   4.40% 4.40% 4.90%
Expected rate of return on plan assets (as a percent)   5.50% 6.30% 6.60%
Rate of compensation increase (as a percent)   3.00% 3.00% 3.00%
Plan Assets        
Maximum target investment in return seeking investments as a percentage of total domestic plan assets   60.00%    
Maximum equity investment in one entity as a percent of total equity portfolio   10.00%    
U.S. Pension Benefits | Accumulated Other Comprehensive Income        
Defined benefit plans        
Settlement expense $ (6,000,000)      
Non-U.S. Pension Plans        
Defined benefit plans        
Service cost   $ 1,800,000 $ 1,700,000 $ 1,600,000
Interest cost   1,800,000 2,800,000 4,200,000
Expected return on plan assets   (1,000,000) (1,000,000) (1,000,000)
Amortization of unrecognized prior service cost, net   100,000 0 0
Amortization of actuarial loss   300,000 100,000 0
Settlement expense   500,000 0 0
Net pension costs   3,500,000 3,600,000 4,800,000
Change in benefit obligation:        
Projected benefit obligation at beginning of year   134,200,000 142,900,000  
Service cost   1,800,000 1,700,000 1,600,000
Interest cost   1,800,000 2,800,000 4,200,000
Amendments   0 700,000  
Actuarial loss (gain)   11,700,000 6,200,000  
Benefits paid   (8,800,000) (8,300,000)  
Gain due to settlement   0 0  
Employee contributions   700,000 800,000  
Effect of exchange rates on projected benefit obligation   (500,000) (12,600,000)  
Projected benefit obligation at end of year 134,200,000 140,900,000 134,200,000 142,900,000
Change in plan assets:        
Fair value of plan assets at beginning of year   29,500,000 29,400,000  
Actual return on plan assets   500,000 0  
Employee and employer contributions   8,500,000 8,900,000  
Benefits paid   (8,800,000) (8,300,000)  
Effect of exchange rates on plan assets   0 (500,000)  
Fair value of plan assets at end of year 29,500,000 29,700,000 29,500,000 $ 29,400,000
Funded status:        
Plan assets less than benefit obligations (104,700,000) (111,200,000) (104,700,000)  
Amounts recorded in the consolidated balance sheets:        
Accrued pension costs, current portion 6,900,000 6,600,000 6,900,000  
Accrued pension costs, long-term portion 97,800,000 104,600,000 97,800,000  
Plan assets less than benefit obligations (104,700,000) (111,200,000) (104,700,000)  
Accumulated Benefit Obligation        
Projected benefit obligation 134,200,000 108,600,000 134,200,000  
Accumulated benefit obligation 131,200,000 108,600,000 131,200,000  
Fair value of plan assets $ 29,500,000 $ 0 $ 29,500,000  
Actuarial Assumptions        
Discount rate for obligation, end of year (as a percent) 2.10% 1.00% 2.10% 2.30%
Discount rate for expense, during the year (as a percent)   1.70% 1.90% 3.00%
Expected rate of return on plan assets (as a percent)   2.00% 3.50% 3.50%
Rate of compensation increase (as a percent)   2.00% 0.20% 0.20%
Other Postretirement Benefit Plans        
Defined benefit plans        
Service cost   $ 400,000 $ 400,000  
Interest cost   300,000 300,000  
Change in benefit obligation:        
Projected benefit obligation at beginning of year   10,300,000 8,900,000  
Service cost   400,000 400,000  
Interest cost   300,000 300,000  
Actuarial loss (gain)   (200,000) (1,100,000)  
Benefits paid   (900,000) (400,000)  
Projected benefit obligation at end of year $ 10,300,000 10,300,000 10,300,000 $ 8,900,000
Change in plan assets:        
Benefits paid   (900,000) (400,000)  
Amounts recorded in the consolidated balance sheets:        
Accrued pension costs, current portion 900,000 900,000 900,000  
Accrued pension costs, long-term portion 9,400,000 9,400,000 9,400,000  
Accumulated other comprehensive loss        
Net actuarial gains (losses) 4,200,000 3,600,000 4,200,000  
Aggregate tax effect $ 1,600,000 1,300,000 $ 1,600,000  
Amount that will be amortized from accumulated other comprehensive loss into net benefit costs   $ 300,000    
Actuarial Assumptions        
Discount rate for obligation, end of year (as a percent) 3.70% 3.10% 3.70% 3.70%
Change in Accounting Method Accounted for as Change in Estimate [Member]        
Retirement and Postemployment Benefits        
Pension Expense   $ 3,100,000.0