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Retirement Benefits (Tables)
12 Months Ended
Sep. 30, 2011
Pension Plans, Defined Benefit [Member]
 
Schedule of Actuarial Assumptions Used
                         
    2011     2010     2009  
United States:
                        
Weighted-average assumptions to determine benefit obligation at September 30:
                        
Discount rate
     5.55 %     5.85 %     5.50 %
Rate of compensation increase
     4.00       4.00       4.00  
 
                        
Weighted-average assumptions to determine periodic benefit costs for years ending September 30:
                        
Discount rate
     5.85       5.50       6.50  
Rate of compensation increase
     4.00       4.00       n/a  
Long-term rate of return on plan assets
     7.90       7.50       7.50  
 
                        
United Kingdom:
                        
Weighted-average assumptions to determine benefit obligation at September 30:
                        
Discount rate
     5.10 %     4.90 %     5.40 %
Rate of compensation increase
     4.30       4.30       4.10  
 
                        
Weighted-average assumptions to determine periodic benefit costs for years ending September 30:
                        
Discount rate
     4.90       5.40       6.90  
Rate of compensation increase
     4.30       4.10       4.70  
Long-term rate of return on plan assets
     6.00       6.50       6.50  
 
                        
Japan:
                        
Weighted-average assumptions to determine benefit obligation at September 30:
                        
Discount rate
     1.50 %     1.25 %     1.75 %
Rate of compensation increase
     2.00       2.00       2.50  
 
                        
Weighted-average assumptions to determine periodic benefit costs for years ending September 30:
                        
Discount rate
     1.25       1.75       1.90  
Rate of compensation increase
     2.00       2.50       2.00  
Long-term rate of return on plan assets
     3.00       3.30       3.11  
 
                        
Switzerland:
                        
Weighted-average assumptions to determine benefit obligation at September 30:
                        
Discount rate
     2.50 %     n/a %     n/a %
Rate of compensation increase
     2.00       n/a       n/a  
 
                        
Weighted-average assumptions to determine periodic benefit costs for years ending September 30:
                        
Discount rate
     3.00       n/a       n/a  
Rate of compensation increase
     2.00       n/a       n/a  
Long-term rate of return on plan assets
     3.00       n/a       n/a  
Schedule of Net Periodic Benefit Costs
                                                                         
    Year Ending September 30,  
    United States     Other Countries     Total  
    2011     2010     2009     2011     2010     2009     2011     2010     2009  
 
                                                                        
Service cost
   $ 3,433     $ 3,647     $ 1,409     $ 992     $ 784     $ 716     $ 4,425     $ 4,431     $ 2,125  
Interest cost
     5,646       4,890       2,964       2,284       2,261       2,175       7,930       7,151       5,139  
Expected return on plan assets
     (6,693 )     (4,759 )     (2,627 )     (2,541 )     (2,361 )     (2,178 )     (9,234 )     (7,120 )     (4,805 )
Amortization of:
                                                                        
Transition obligation
     —       —       —       —       86       81       —       86       81  
Net (gains) losses
     312       583       337       900       753       135       1,212       1,336       472  
Net prior service (benefit) cost
     75       (260 )     (259 )     (9 )     (8 )     (7 )     66       (268 )     (266 )
Settlement costs
     —       —       —       —       345       —       —       345       —  
Curtailment costs
     —       165       —       —       —       237       —       165       237  
 
                                                      
Net periodic (benefit) cost
   $ 2,773     $ 4,266     $ 1,824     $ 1,626     $ 1,860     $ 1,159     $ 4,399     $ 6,126     $ 2,983  
 
                                                      
Schedule of Changes in Projected Benefit Obligations and Fair Value of Plan Assets
                                                 
    At or for the Year Ending September 30,  
    United States     Other Countries     Total  
    2011     2010     2011     2010     2011     2010  
Changes in projected benefit obligation:
                                                
Projected benefit obligation at beginning of year
   $ 97,786     $ 89,551     $ 56,657     $ 53,450     $ 154,443     $ 143,001  
Obligation assumed in IDS Acquisition
     —       —       2,038       —       2,038       —  
Service cost
     3,433       3,647       992       784       4,425       4,431  
Interest cost
     5,646       4,890       2,284       2,261       7,930       7,151  
Net actuarial (gains) losses
     1,686       (2,877 )     (3,498 )     2,902       (1,812 )     25  
Contribution by participants
     —       —       122       25       122       25  
Benefits paid
     (2,210 )     (1,552 )     (2,090 )     (3,139 )     (4,300 )     (4,691 )
Amounts paid by Company for Pension Protection Fund levy
     —       —       (67 )     —       (67 )     —  
Curtailment loss
     —       165       —       —       —       165  
Plan amendments
     —       3,962       —       —       —       3,962  
Foreign currency exchange rate changes
     —       —       917       374       917       374  
 
                                    
Projected benefit obligation at end of year
   $ 106,341     $ 97,786     $ 57,355     $ 56,657     $ 163,696     $ 154,443  
 
                                    
 
                                                
Changes in fair value of plan assets:
                                                
Fair value of plan assets at beginning of year
   $ 85,128     $ 64,102     $ 43,539     $ 40,726     $ 128,667     $ 104,828  
Plan assets received in connection with IDS Acquisition
     —       —       1,604       —       1,604       —  
Actual return on plan assets
     482       7,998       708       3,209       1,190       11,207  
Contributions by the company
     6,580       14,580       4,151       2,793       10,731       17,373  
Contributions by plan participants
     —       —       122       25       122       25  
Benefits paid
     (2,210 )     (1,552 )     (2,090 )     (3,139 )     (4,300 )     (4,691 )
Foreign currency exchange rate changes
     —       —       333       (75 )     333       (75 )
 
                                    
Fair value of plan assets at end of year
   $ 89,980     $ 85,128     $ 48,367     $ 43,539     $ 138,347     $ 128,667  
 
                                    
Underfunded status at end of year
   $ (16,361 )   $ (12,658 )   $ (8,988 )   $ (13,118 )   $ (25,349 )   $ (25,776 )
 
                                    
Schedule of Amounts Recognized in Balance Sheet and Other Comprehensive Income (Loss)
                                                 
    At or for the Year Ending September 30,  
    United States     Other Countries     Total  
    2011     2010     2011     2010     2011     2010  
Amounts recognized in statement of financial position consist of:
                                                
Other non-current liabilities
   $  (16,361 )   $  (12,658 )   $  (8,988 )   $  (13,118 )   $  (25,349 )   $  (25,776 )
 
                                    
Underfunded status at end of year
   $ (16,361 )   $ (12,658 )   $ (8,988 )   $ (13,118 )   $ (25,349 )   $ (25,776 )
 
                                    
 
                                                
Amounts recognized in accumulated other comprehensive income consist of:
                                                
Unrecognized net prior service (benefit) cost
   $ 1,517     $ 1,593     $ (24 )   $ (30 )   $ 1,493     $ 1,563  
Unrecognized net (gains) losses
     16,769       9,183       13,779       15,963       30,548       25,146  
 
                                    
Total amounts recognized
     18,286       10,776       13,755       15,933       32,041       26,709  
Deferred taxes
     (6,949 )     (4,095 )     (4,763 )     (5,585 )     (11,712 )     (9,680 )
 
                                    
Amounts recognized in accumulated other comprehensive income
   $ 11,337     $ 6,681     $ 8,992     $ 10,348     $ 20,329     $ 17,029  
 
                                    
Schedule of Accumulated and Projected Benefit Obligations and Fair Value of Plan Assets
                                                 
    At or for the Year Ending September 30,  
    United States     Other Countries     Total  
    2011     2010     2011     2010     2011     2010  
 
                                                
Projected benefit obligation
  $ (106,341 )   $ (97,786 )   $ (57,355 )   $ (56,657 )   $ (163,696 )   $ (154,443 )
Accumulated benefit obligation
     (96,630 )     (86,260 )     (54,304 )     (54,139 )     (150,934 )     (140,399 )
Fair value of plan assets
    89,980       85,128       48,367       43,539       138,347       128,667  
Schedule of Changes in Plan Assets and Benefit Obligations Recognized in Other Comprehensive Income (Loss)
                                                 
    Year Ending September 30,  
    United States     Other Countries     Total  
    2011     2010     2011     2010     2011     2010  
 
                                                
Net (gain) loss
  $ 7,897     $ (6,182 )   $ (1,664 )   $ 2,233     $ 6,233     $ (3,949 )
Prior service (benefit) cost
    —       3,963       —       —       —       3,963  
Amortization of net gains (losses)
    (312 )     (583 )     (899 )     (753 )     (1,211 )     (1,336 )
Amortization of transition obligation asset
     —       —       —       (86 )     —       (86 )
Amortization of prior service benefit (cost)
     (75 )     260       9       8       (66 )     268  
Settlement loss
    —       —       —       (345 )     —       (345 )
Foreign currency exchange rate changes
    —       —       376       (60 )     376       (60 )
 
                                    
Total recognized in accumulated other comprehensive income
   $ 7,510     $ (2,542 )   $ (2,178 )   $ 997     $ 5,332     $ (1,545 )
 
                                    
Schedule of Amounts Expected to be Amortized from Accumulated Other Comprehensive Income (Loss) and Reported as a Component of Net Periodic Benefit Cost During the Next Fiscal Year
                         
    United     Other        
    States     Countries     Total  
Prior service (benefit) cost
   $ 75     $ (9 )   $ 66  
Net actuarial (gains) losses
    524       667       1,191  
Schedule of Expected Benefit Payments
                         
    United     Other        
Year Ending September 30,   States     Countries     Total  
2012
  $ 3,109     $ 2,468     $ 5,577  
2013
    3,581       2,673       6,254  
2014
    4,154       2,583       6,737  
2015
     4,732       2,925       7,657  
2016
     5,250       2,704       7,954  
2017 — 2021
    36,000       15,771       51,771  
Schedule of Allocation of Plan Assets, Actual and Target Allocations
                                 
    At September 30,  
    2011     2010  
    Percentage     Target     Percentage     Target  
    of Plan     Allocation     of Plan     Allocation  
    Assets     Ranges     Assets     Ranges  
United States:
                                
Asset Class
                                
Equity Securities
     58.7 %     39.7- 79.7 %     49.8 %     40.0- 60.0 %
Debt Securities
     41.1 %     30.3- 50.3 %     50.0 %     40.0- 60.0 %
Other
     0.2 %     0.0 %     0.2 %     0.0 %
 
                            
 
     100.0 %             100.0 %        
United Kingdom:
                                
Asset Class
                                
Equity Securities
     37.7 %     40.0- 60.0 %     40.7 %     46.0- 54.0 %
Debt Securities
     62.2 %     35.0- 65.0 %     58.9 %     46.5- 53.5 %
Other
     0.1 %     0.0 %     0.4 %     0.0 %
 
                            
 
     100.0 %             100.0 %        
Japan:
                                
Asset Class
                                
Equity Securities
     39.9 %     36.0- 44.0 %     55.2 %     50.0- 58.0 %
Debt Securities
     59.2 %     55.0- 63.0 %     43.1 %     41.0- 49.0 %
Other
     0.9 %     0.0- 2.0 %     1.7 %     0.0- 2.0 %
 
                            
 
     100.0 %             100.0 %        
Switzerland:
                                
Asset Class
                                
Equity Securities
     0.0 %     0.0 %     n/a       n/a  
Debt Securities
     0.0 %     0.0 %     n/a       n/a  
Other
     100.0 %     100.0 %     n/a       n/a  
 
                            
 
     100.0 %             n/a          
Schedule of Allocation of Plan Assets, Fair Value Hieracrchy
                                                         
    At September 30, 2011  
    Level 1     Level 2     Level 3        
    United     Other     United     Other     United     Other        
    States     Countries     States     Countries     States     Countries     Total  
Asset Category:
                                                        
Cash and cash equivalents
   $ 198     $ 125     $ —     $ —     $ —     $ —     $ 323  
Mutual funds:
                                                        
U.S. corporate bond fund
     36,958       —       —       —       —       —       36,958  
U.S. equity large cap fund
     29,169       —       —       —       —       —       29,169  
International equity large cap growth fund
     23,655       —       —       —       —       —       23,655  
Pooled funds:
                                                        
Japanese equity securities
     —       —       —       1,921       —       —       1,921  
International equity securities
     —       —       —       1,652       —       —       1,652  
Japanese fixed income securities
     —       —       —       3,958       —       —       3,958  
International fixed income securities
     —       —       —       1,336       —       —       1,336  
Index linked U.K. equity fund
     —       —       —       7,098       —       —       7,098  
Index linked international equity fund
     —       —       —       7,062       —       —       7,062  
Index linked U.K. corporate bonds fund
     —       —       —       13,255       —       —       13,255  
Index linked U.K. government securities fund
     —       —       —       3,646       —       —       3,646  
Index linked U.K. long-term government securities fund
     —       —       —       6,440       —       —       6,440  
Insurance backed assets:
                                                        
Insurance backed assets
     —       —       —       —       —       1,874       1,874  
 
                                          
Total assets
   $ 89,980     $ 125     $ —     $ 46,368     $ —     $ 1,874     $ 138,347  
 
                                          
Other Postretirement Benefit Plans, Defined Benefit [Member]
 
Schedule of Actuarial Assumptions Used
                         
    2011     2010     2009  
Weighted-average discount rate used to determine benefit obligation at September 30
    5.54 %     5.84 %     5.50 %
 
Weighted-average discount rate used to determine net periodic benefit cost for years ended September 30
     5.84       5.50       6.51  
Schedule of Net Periodic Benefit Costs
                         
    Year Ending September 30,  
    2011     2010     2009  
 
                        
Service cost
   $ 92     $ 120     $ 169  
Interest cost
     1,974       2,081       2,330  
Amortization of:
                        
Net (gains) losses
     128       189       97  
Net prior service (benefit) cost
     (871 )     (1,249 )     (3,232 )
 
                  
 
                        
Net periodic (benefit) cost
   $ 1,323     $ 1,141     $ (636 )
 
                  
Schedule of Changes in Projected Benefit Obligations and Fair Value of Plan Assets
                 
    Year Ending September 30,  
    2011     2010  
Changes in projected benefit obligation:
                
Projected benefit obligation at beginning of year
  $ 37,222     $ 42,427  
Service cost
    92       120  
Interest cost
    1,974       2,081  
Premiums paid by plan participants
    2,133       2,274  
Net actuarial (gains) losses
     (3,146 )     (3,932 )
Benefits paid
    (5,349 )     (5,738 )
Foreign currency exchange rate changes
    (3 )     (10 )
 
            
 
                
Projected benefit obligation at end of year
  $ 32,923     $ 37,222  
 
            
 
                
Changes in fair value of plan assets:
                
Fair value of plan assets at beginning of year
  $ —     $ —  
Contributions by the company
    3,216       3,464  
Premiums paid by plan participants
    2,133       2,274  
Benefits paid
    (5,349 )     (5,738 )
 
            
 
Fair value of plan assets at end of year
  $ —     $ —  
 
            
 
Funded status at end of year
  $ (32,923 )   $ (37,222 )
 
            
Schedule of Amounts Recognized in Balance Sheet and Other Comprehensive Income (Loss)
                 
    Year Ending September 30,  
    2011     2010  
Amounts recognized in statement of financial position consist of:
                
Accrued liabilities
   $ (2,503 )   $ (2,693 )
Other non-current liabilities
     (30,420 )     (34,529 )
 
            
 
                
Funded status at end of year
   $ (32,923 )   $ (37,222 )
 
            
 
                
Amounts recognized in accumulated other comprehensive income consist of:
                
Unrecognized net prior service (benefit) cost
   $ (1,501 )   $ (2,372 )
Unrecognized net (gains) losses
     (2,272 )     1,001  
 
            
 
                
Total amounts recognized
     (3,773 )     (1,371 )
Deferred taxes
     1,437       530  
 
            
 
                
Amounts recognized in accumulated other comprehensive income
   $ (2,336 )   $ (841 )
 
            
Schedule of Accumulated and Projected Benefit Obligations and Fair Value of Plan Assets
                 
    Year Ending  
    September 30,  
    2011     2010  
 
                
Accumulated postretirement benefit obligation
   $ (32,923 )   $ (37,222 )
Schedule of Changes in Plan Assets and Benefit Obligations Recognized in Other Comprehensive Income (Loss)
                 
    Year Ending  
    September 30  
    2011     2010  
 
                
Net (gain) loss
   $ (3,145 )   $ (3,924 )
Amortization of net (gains) losses
     (128 )     (189 )
Amortization of prior service benefit (cost)
     871       1,249  
 
            
Total recognized in accumulated other comprehensive income
   $ (2,402 )   $ (2,864 )
 
            
Schedule of Health Care Cost Trend Rates
                 
    2011     2010  
Health care cost trend rate assumed for next year
    8.0 %     8.5 %
Rate to which the cost trend rate is assumed to decline (the ultimate trend rate)
    5.0 %     5.0 %
Year that the rate reaches the ultimate trend rate
    2018       2018  
Schedule of Health Care Costs Sensitivity
                 
    1% increase     1% decrease  
Effect on projected fiscal year 2012 service and interest cost
  $ 182     $ (159 )
Effect on accumulated postretirement benefit obligation at September 30, 2011
     3,107       (2,722 )
Schedule of Future Postretirement Company Contributions
         
Year Ending September 30,        
2012
   $ 4,493  
2013
     4,763  
2014
     4,911  
2015
     4,834  
2016
     4,841  
2017 — 2021
     21,991