Benefit Plans (Details 6) (Foreign plans [Member], USD $) In Thousands	12 Months Ended
Sep. 30, 2011	Sep. 30, 2010
Actual return on plan assets:
Ending fair value	$ 419,452	$ 409,298
Equity Securities [Member]
Actual return on plan assets:
Ending fair value	215,309	220,102
Equity Securities [Member] \| Significant Unobservable Inputs (Level 3) [Member]
Changes in fair value of foreign pension assets measured using Level 3 inputs
Beginning fair value	267	494
Actual return on plan assets:
Relating to assets held at September 30, 2010 and 2011respectively	(4)	0
Relating to assets sold during the period	0	(199)
Purchases, sales and settlements, net	0	7
Transfers in (out) from other categories	0	(3)
Exchange rate changes	(5)	(32)
Ending fair value	258	267
Real Estate [Member]
Actual return on plan assets:
Ending fair value	10,688	9,486
Real Estate [Member] \| Significant Unobservable Inputs (Level 3) [Member]
Changes in fair value of foreign pension assets measured using Level 3 inputs
Beginning fair value	9,486	8,987
Actual return on plan assets:
Relating to assets held at September 30, 2010 and 2011respectively	46	558
Relating to assets sold during the period	0	185
Purchases, sales and settlements, net	1,363	122
Transfers in (out) from other categories	0	0
Exchange rate changes	(207)	(366)
Ending fair value	10,688	9,486
Insurance Contracts [Member]
Actual return on plan assets:
Ending fair value	78,345	62,333
Insurance Contracts [Member] \| Significant Unobservable Inputs (Level 3) [Member]
Changes in fair value of foreign pension assets measured using Level 3 inputs
Beginning fair value	62,244	59,078
Actual return on plan assets:
Relating to assets held at September 30, 2010 and 2011respectively	2,613	2,075
Relating to assets sold during the period	0	0
Purchases, sales and settlements, net	14,710	0
Transfers in (out) from other categories	92	4,866
Exchange rate changes	(1,314)	(3,775)
Ending fair value	78,345	62,244
Significant Unobservable Inputs (Level 3) [Member]
Changes in fair value of foreign pension assets measured using Level 3 inputs
Beginning fair value	71,997	68,559
Actual return on plan assets:
Relating to assets held at September 30, 2010 and 2011respectively	2,655	2,633
Relating to assets sold during the period	0	(14)
Purchases, sales and settlements, net	16,073	129
Transfers in (out) from other categories	92	4,863
Exchange rate changes	(1,526)	(4,173)
Ending fair value	$ 89,291	$ 71,997

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