Financial Instruments and Fair Value Measurements (Tables)

6 Months Ended

Mar. 31, 2012

Financial Instruments and Fair Value Measurements [Abstract]

Fair Value of Financial Instruments

			Basis of Fair Value Measurement
	March 31, 2012 Carrying Value		Quoted Prices in Active Markets for Identical Assets (Level 1)		Significant Other Observable Inputs (Level 2)		Significant Unobservable Inputs (Level 3)
Assets
Institutional money market investments	$	1,118,703	$	1,118,703	$	—	$	—
Forward exchange contracts		12,757		—		12,757		—
Interest rate swap		4,227		—		4,227		—
Total Assets	$	1,135,687	$	1,118,703	$	16,984	$	—
Liabilities
Forward exchange contracts	$	12,903	$	—	$	12,903	$	—
Long-term debt		3,964,134		—		4,257,778		—
Contingent consideration liability		8,628		—		—		8,628
Total Liabilities	$	3,985,665	$	—	$	4,270,681	$	8,628

			Basis of Fair Value Measurement
	September 30, 2011 Carrying Value		Quoted Prices in Active Markets for Identical Assets (Level 1)		Significant Other Observable Inputs (Level 2)		Significant Unobservable Inputs (Level 3)
Assets
Institutional money market investments	$	590,515	$	590,515	$	—	$	—
Forward exchange contracts		37,198		—		37,198		—
Interest rate swap		5,959		—		5,959		—
Total Assets	$	633,672	$	590,515	$	43,157	$	—
Liabilities
Forward exchange contracts	$	39,589	$	—	$	39,589	$	—
Interest rate swaps		69,103		—		69,103		—
Long-term debt		2,484,665		—		2,839,697		—
Total Liabilities	$	2,593,357	$	—	$	2,948,389	$	—