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Pension Plans (Details 2) - USD ($)
$ in Thousands
 12 Months Ended
Sep. 30, 2014
Sep. 30, 2013
Sep. 30, 2012
Components of net periodic (benefit) cost:      
Amount, net of applicable deferred income taxes, included in other comprehensive income arising from a change in net prior service cost and net gain/loss $ 24,161 $ 14,582 $ 41,778
Parent      
Components of net periodic (benefit) cost:      
Amount, net of applicable deferred income taxes, included in other comprehensive income arising from a change in net prior service cost and net gain/loss 9,900 (19,100) 9,800
Pension Plan, Defined Benefit [Member]      
Components of net periodic (benefit) cost:      
Amount, net of applicable deferred income taxes, included in other comprehensive income arising from a change in net prior service cost and net gain/loss 7,600 2,600 9,000
United States Pension Plan of US Entity, Defined Benefit      
Components of net periodic (benefit) cost:      
Interest cost on projected benefit obligation 7,800 6,600 7,700
Expected return on plan assets (8,600) (8,500) (8,400)
Amortization of net loss 4,000 4,300 3,100
Net periodic cost 3,200 2,400 2,400
Amounts included in accumulated other comprehensive loss that are expected to be recognized as components of net periodic benefit cost during the next fiscal year      
Amortization of net actuarial losses (4,300)    
Total (4,300)    
Additional year-end information for pension plans with accumulated benefit obligations in excess of plan assets      
Projected benefit obligation 217,000 180,300 192,900
Accumulated benefit obligation 217,000 180,300 192,900
Fair values of plan assets 139,700 $ 119,800 $ 112,300
Expected employer contributions in next fiscal year 5,400    
Expected future benefit payments      
2015 12,200    
2016 14,900    
2017 13,400    
2018 12,900    
2019 13,400    
2020-2024 68,300    
Total $ 135,100    
Weighted-average assumptions to determine benefit obligation:      
Discount rate (as a percent) 4.00% 4.40% 3.50%
Weighted-average assumptions to determine net periodic benefit cost:      
Discount rate (as a percent) 4.40% 3.50% 4.65%
Expected long-term rate of return on plan assets (as a percent) 7.50% 7.50% 7.50%
Target Allocations by Asset Category      
Target Allocations by Asset Category (as a percent) 100.00%    
Percentage of Plan Assets by Asset Category      
Plan Assets by Asset Category (as a percent) 100.00% 100.00%  
United States Pension Plan of US Entity, Defined Benefit | Equity Securities [Member]      
Target Allocations by Asset Category      
Target Allocations by Asset Category (as a percent) 45.00%    
Percentage of Plan Assets by Asset Category      
Plan Assets by Asset Category (as a percent) 58.00% 49.00%  
United States Pension Plan of US Entity, Defined Benefit | Debt Securities [Member]      
Target Allocations by Asset Category      
Target Allocations by Asset Category (as a percent) 42.00%    
Percentage of Plan Assets by Asset Category      
Plan Assets by Asset Category (as a percent) 31.00% 34.00%  
United States Pension Plan of US Entity, Defined Benefit | Cash and Cash Equivalents [Member]      
Target Allocations by Asset Category      
Target Allocations by Asset Category (as a percent) 3.00%    
Percentage of Plan Assets by Asset Category      
Plan Assets by Asset Category (as a percent) 1.00% 1.00%  
United States Pension Plan of US Entity, Defined Benefit | Property and Other [Member]      
Target Allocations by Asset Category      
Target Allocations by Asset Category (as a percent) 10.00%    
Percentage of Plan Assets by Asset Category      
Plan Assets by Asset Category (as a percent) 10.00% 16.00%  
Foreign Pension Plan, Defined Benefit      
Components of net periodic (benefit) cost:      
Service costs $ 700 $ 900 $ 1,100
Interest cost on projected benefit obligation 27,900 23,800 25,600
Expected return on plan assets (26,100) (22,700) (25,300)
Amortization of prior service cost (200) (200) (200)
Amortization of net loss 4,900 4,000 2,300
Settlement loss recognized 400 2,600 500
Net periodic cost 7,600 8,500 4,000
Amounts included in accumulated other comprehensive loss that are expected to be recognized as components of net periodic benefit cost during the next fiscal year      
Amortization of prior service credit (200) (200) (200)
Amortization of net actuarial losses (6,200)    
Total (6,000)    
Additional year-end information for pension plans with accumulated benefit obligations in excess of plan assets      
Projected benefit obligation 658,500 601,700 574,000
Accumulated benefit obligation 656,300 599,800 570,600
Fair values of plan assets 513,400 $ 469,000 $ 462,400
Expected employer contributions in next fiscal year 17,000    
Expected future benefit payments      
2015 26,500    
2016 21,900    
2017 26,300    
2018 29,100    
2019 25,800    
2020-2024 153,300    
Total $ 282,900    
Weighted-average assumptions to determine benefit obligation:      
Discount rate (as a percent) 3.94% 4.44% 4.39%
Salary increase rate (as a percent) 2.38% 2.58% 2.36%
Weighted-average assumptions to determine net periodic benefit cost:      
Discount rate (as a percent) 4.44% 4.39% 5.12%
Salary increase rate (as a percent) 2.58% 2.36% 2.65%
Expected long-term rate of return on plan assets (as a percent) 5.40% 5.11% 5.65%
Target Allocations by Asset Category      
Target Allocations by Asset Category (as a percent) 100.00%    
Percentage of Plan Assets by Asset Category      
Plan Assets by Asset Category (as a percent) 100.00% 100.00%  
Foreign Pension Plan, Defined Benefit | Equity Securities [Member]      
Target Allocations by Asset Category      
Target Allocations by Asset Category (as a percent) 1.00%    
Percentage of Plan Assets by Asset Category      
Plan Assets by Asset Category (as a percent) 28.00% 28.00%  
Foreign Pension Plan, Defined Benefit | Debt Securities [Member]      
Target Allocations by Asset Category      
Target Allocations by Asset Category (as a percent) 47.00%    
Percentage of Plan Assets by Asset Category      
Plan Assets by Asset Category (as a percent) 33.00% 37.00%  
Foreign Pension Plan, Defined Benefit | Cash and Cash Equivalents [Member]      
Target Allocations by Asset Category      
Target Allocations by Asset Category (as a percent) 1.00%    
Percentage of Plan Assets by Asset Category      
Plan Assets by Asset Category (as a percent) 3.00% 4.00%  
Foreign Pension Plan, Defined Benefit | Property and Other [Member]      
Target Allocations by Asset Category      
Target Allocations by Asset Category (as a percent) 51.00%    
Percentage of Plan Assets by Asset Category      
Plan Assets by Asset Category (as a percent) 36.00% 31.00%