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Restructuring and Related Charges - Summary of Restructuring and Related Charges Incurred by Type of Charge (Detail) (USD $)
In Thousands, unless otherwise specified
 12 Months Ended
Sep. 30, 2012
Sep. 30, 2011
Sep. 30, 2010
Costs included in cost of goods sold:      
Total included in cost of goods sold $ 9,835 $ 7,841 $ 7,150
Costs included in selling, general and administrative expenses:      
Total included in selling, general and administrative expenses 9,756 20,803 16,968
Total restructuring and related charges 19,591 28,644 24,118
Global Cost Reduction Initiatives [Member]
      
Costs included in selling, general and administrative expenses:      
Total restructuring and related charges 18,690 25,484 18,443
Global Cost Reduction Initiatives [Member] | Termination benefits [Member]
      
Costs included in cost of goods sold:      
Total included in cost of goods sold 2,941 1,679 2,630
Costs included in selling, general and administrative expenses:      
Total included in selling, general and administrative expenses 3,079 10,155 4,268
Global Cost Reduction Initiatives [Member] | Other associated costs [Member]
      
Costs included in cost of goods sold:      
Total included in cost of goods sold 6,894 5,889 2,273
Costs included in selling, general and administrative expenses:      
Total included in selling, general and administrative expenses 5,776 7,761 9,272
Other Initiatives [Member]
      
Costs included in selling, general and administrative expenses:      
Total restructuring and related charges 901 3,160 5,675
Other Initiatives [Member] | Termination benefits [Member]
      
Costs included in cost of goods sold:      
Total included in cost of goods sold     201
Costs included in selling, general and administrative expenses:      
Total included in selling, general and administrative expenses   956 5,269
Other Initiatives [Member] | Other associated costs [Member]
      
Costs included in cost of goods sold:      
Total included in cost of goods sold   273 2,046
Costs included in selling, general and administrative expenses:      
Total included in selling, general and administrative expenses $ 901 $ 1,931 $ (1,841)