Credit Facilities and Short-term Borrowings (Short-term Borrowings and Availability Under Various Short-term Credit Facilities) (Details) (USD $)	Sep. 30, 2013	Sep. 30, 2012
Total availability	$ 638,618,000
Outstanding letters of credit and guarantees	(5,061,000)
Outstanding borrowings	0
Remaining availability	633,557,000
Foreign Performance Guarantee Facilities [Member]
Total availability	10,391,000
Outstanding letters of credit and guarantees	(547,000)
Outstanding borrowings	0
Remaining availability	9,844,000
Foreign Lines of Credit And Overdraft Facilities [Member]
Total availability	28,227,000
Outstanding letters of credit and guarantees	0
Outstanding borrowings	0	(329,000)
Remaining availability	28,227,000
Domestic Line Of Credit [Member]
Total availability	200,000,000
Outstanding borrowings	(200,000,000)
Revolving Credit Facility [Member]
Total availability	600,000,000
Outstanding letters of credit and guarantees	(4,514,000)
Outstanding borrowings	0
Remaining availability	595,486,000
Chinese Credit Facility [Member]
Total availability	22,700,000
Outstanding borrowings	$ 0	$ 0