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Plan Asset Allocations and Expected Future Benefit Payments (Detail) (USD $)
In Millions, unless otherwise specified
12 Months Ended
Sep. 30, 2012
Expected future benefit payments:  
2013 2.5
2014 2.5
2015 2.5
2016 2.4
2017 2.4
2018 - 2022 11.1
U.S. Defined Benefit Plans
 
Plan asset allocations:  
Expected company contributions in fiscal 2013 2.8
Expected future benefit payments:  
2013 7.1
2014 7.1
2015 7.2
2016 7.2
2017 7.3
2018 - 2022 36.2
U.S. Defined Benefit Plans | Fiscal Year 2013
 
Plan asset allocations:  
Equity securities 33.00%
Debt securities 67.00%
Cash and cash equivalents 0.00%
Defined Benefit Plan, Target Allocation, Percentage Of Assets, Insurance Contracts 0.00%
U.S. Defined Benefit Plans | Fiscal Year 2012
 
Plan asset allocations:  
Equity securities 36.00%
Debt securities 61.00%
Cash and cash equivalents 3.00%
Defined Benefit Plan, Target Allocation, Percentage Of Assets, Insurance Contracts 0.00%
U.S. Defined Benefit Plans | Fiscal Year 2011
 
Plan asset allocations:  
Equity securities 36.00%
Debt securities 63.00%
Cash and cash equivalents 1.00%
Defined Benefit Plan, Target Allocation, Percentage Of Assets, Insurance Contracts 0.00%
International Defined Benefit Plans
 
Plan asset allocations:  
Expected company contributions in fiscal 2013 7.2
Expected future benefit payments:  
2013 5.8
2014 6.2
2015 6.9
2016 7.0
2017 7.8
2018 - 2022 45.6
International Defined Benefit Plans | Fiscal Year 2013
 
Plan asset allocations:  
Equity securities 52.00%
Debt securities 41.00%
Cash and cash equivalents 1.00%
Defined Benefit Plan, Target Allocation, Percentage Of Assets, Insurance Contracts 6.00%
International Defined Benefit Plans | Fiscal Year 2012
 
Plan asset allocations:  
Equity securities 54.00%
Debt securities 41.00%
Cash and cash equivalents 0.00%
Defined Benefit Plan, Target Allocation, Percentage Of Assets, Insurance Contracts 5.00%
International Defined Benefit Plans | Fiscal Year 2011
 
Plan asset allocations:  
Equity securities 53.00%
Debt securities 41.00%
Cash and cash equivalents 1.00%
Defined Benefit Plan, Target Allocation, Percentage Of Assets, Insurance Contracts 5.00%