Retirement Benefits (Schedule of Changes in Projected Benefit Obligations, Fair Value of Plan Assets, and Funded Status of Plan) (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Sep. 30, 2014	Sep. 30, 2013	Sep. 30, 2012
Pension Plans, Defined Benefit [Member]
Changes in projected benefit obligation:
Projected benefit obligation at beginning of year	$ 190,423	$ 198,476
Service cost	4,504	5,660	4,666
Interest cost	8,792	7,682	8,096
Net actuarial (gains) losses	15,461	(12,615)
Contribution by participants	91	253
Benefits paid	(6,050)	(5,736)
Amounts paid by Company for Pension Protection Fund levy	(13)	(2)
Plan amendments	3,355	0
Settlements	(1,985)	(406)
Curtailments	(12,258)	(271)
Foreign currency exchange rate changes	(1,045)	(2,618)
Projected benefit obligation at end of year	201,275	190,423	198,476
Changes in fair value of plan assets:
Fair value of plan assets at beginning of year	190,175	161,503
Actual return on plan assets	20,976	17,162
Contributions by the company	2,962	19,237
Contributions by plan participants	91	253
Benefits paid	(6,050)	(5,736)
Settlements	(1,985)	(406)
Foreign currency exchange rate changes	(1,008)	(1,838)
Fair value of plan assets at end of year	205,161	190,175	161,503
Net over/(under)funded status at end of year	3,886	(248)
United States Pension Plans of US Entity, Defined Benefit [Member]
Changes in projected benefit obligation:
Projected benefit obligation at beginning of year	126,532	137,639
Service cost	3,516	4,608	3,530
Interest cost	6,382	5,569	5,816
Net actuarial (gains) losses	12,446	(18,165)
Contribution by participants	0	12
Benefits paid	(3,732)	(3,131)
Amounts paid by Company for Pension Protection Fund levy	0	0
Plan amendments	3,355	0
Settlements	0	0
Curtailments	(10,759)	0
Foreign currency exchange rate changes	0	0
Projected benefit obligation at end of year	137,740	126,532	137,639
Changes in fair value of plan assets:
Fair value of plan assets at beginning of year	129,518	105,966
Actual return on plan assets	15,764	10,621
Contributions by the company	540	16,050
Contributions by plan participants	0	12
Benefits paid	(3,732)	(3,131)
Settlements	0	0
Foreign currency exchange rate changes	0	0
Fair value of plan assets at end of year	142,090	129,518	105,966
Net over/(under)funded status at end of year	4,350	2,986
Foreign Pension Plans, Defined Benefit [Member]
Changes in projected benefit obligation:
Projected benefit obligation at beginning of year	63,891	60,837
Service cost	988	1,052	1,136
Interest cost	2,410	2,113	2,280
Net actuarial (gains) losses	3,015	5,550
Contribution by participants	91	241
Benefits paid	(2,318)	(2,605)
Amounts paid by Company for Pension Protection Fund levy	(13)	(2)
Plan amendments	0	0
Settlements	(1,985)	(406)
Curtailments	(1,499)	(271)
Foreign currency exchange rate changes	(1,045)	(2,618)
Projected benefit obligation at end of year	63,535	63,891	60,837
Changes in fair value of plan assets:
Fair value of plan assets at beginning of year	60,657	55,537
Actual return on plan assets	5,212	6,541
Contributions by the company	2,422	3,187
Contributions by plan participants	91	241
Benefits paid	(2,318)	(2,605)
Settlements	(1,985)	(406)
Foreign currency exchange rate changes	(1,008)	(1,838)
Fair value of plan assets at end of year	63,071	60,657	55,537
Net over/(under)funded status at end of year	(464)	(3,234)
United Kingdom Plan, Defined Benefit [Member]
Changes in projected benefit obligation:
Projected benefit obligation at end of year	52,710
Changes in fair value of plan assets:
Fair value of plan assets at end of year	52,260
Japan Plan, Defined Benefit [Member]
Changes in projected benefit obligation:
Projected benefit obligation at end of year	10,825
Changes in fair value of plan assets:
Fair value of plan assets at end of year	10,811
Other Postretirement Benefit Plans, Defined Benefit [Member]
Changes in projected benefit obligation:
Projected benefit obligation at beginning of year	28,996	37,550
Service cost	47	71	70
Interest cost	1,432	1,244	1,798
Net actuarial (gains) losses	1,145	(7,501)
Contribution by participants	1,843	1,837
Benefits paid	(4,243)	(4,206)
Foreign currency exchange rate changes	5	1
Projected benefit obligation at end of year	29,225	28,996	37,550
Changes in fair value of plan assets:
Fair value of plan assets at beginning of year	0	0
Contributions by the company	2,400	2,369
Contributions by plan participants	1,843	1,837
Benefits paid	(4,243)	(4,206)
Fair value of plan assets at end of year	0	0	0
Net over/(under)funded status at end of year	$ (29,225)	$ (28,996)