Pension Plans (Narrative) (Details) (USD $)	12 Months Ended
	Sep. 30, 2012	Sep. 30, 2011	Sep. 30, 2010
Defined Benefit Plan Disclosure [Line Items]
Actuarial loss expected to be recognized in the following year	$ 4,000,000
Actual return on plan assets gain (loss)	16,500,000	(1,600,000)	7,700,000
Employer contributions	7,700,000	2,200,000	9,200,000
U.S. Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
Long-term rate of return	7.25%
Net periodic pension cost	3,045,000	2,803,000	3,089,000
International Plans [Member]
Defined Benefit Plan Disclosure [Line Items]
Long-term rate of return	5.40%
Net periodic pension cost	2,841,000	2,244,000	1,647,000
U.S. Plan And The German Co Create Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
Current asset allocation target for equity securities	60.00%
Current asset allocation target for fixed income securities	40.00%
Other International Plans [Member]
Defined Benefit Plan Disclosure [Line Items]
Current asset allocation target for fixed income securities	100.00%
Subsequent Year, Estimated Cost [Member]
Defined Benefit Plan Disclosure [Line Items]
Net periodic pension cost	5,400,000
Expected 2013 employer contributions	$ 9,300,000
Minimum [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined benefit plans, vesting period	1 year
Maximum [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined benefit plans, vesting period	5 years