Other Intangibles, Net (Schedule of Finite-Lived Intangible Assets by Major Class) (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Dec. 31, 2012	Dec. 31, 2011	Sep. 30, 2012
Gross Carrying Value	$ 483,480		$ 404,061
Accumulated Amortization	(176,337)		(168,498)
Net Carrying Amount	307,143		235,563
Amortization expense	7,667	8,258
Customer Relationships [Member]
Gross Carrying Value	314,144		246,991
Accumulated Amortization	(90,990)		(85,920)
Net Carrying Amount	223,154		161,071
Intellectual Property [Member]
Gross Carrying Value	20,111		20,001
Accumulated Amortization	(13,629)		(13,229)
Net Carrying Amount	6,482		6,772
Process Technology [Member]
Gross Carrying Value	99,685		94,882
Accumulated Amortization	(32,231)		(30,328)
Net Carrying Amount	67,454		64,554
Other Intangibles [Member]
Gross Carrying Value	49,540		42,187
Accumulated Amortization	(39,487)		(39,021)
Net Carrying Amount	10,053		3,166
Aerospace [Member]
Gross Carrying Value	395,508		316,586
Accumulated Amortization	(123,611)		(117,637)
Net Carrying Amount	271,897		198,949
Aerospace [Member] | Customer Relationships [Member]
Gross Carrying Value	272,233		205,221
Accumulated Amortization	(63,574)		(59,297)
Net Carrying Amount	208,659		145,924
Aerospace [Member] | Intellectual Property [Member]
Gross Carrying Value	0		0
Accumulated Amortization	0		0
Net Carrying Amount	0		0
Aerospace [Member] | Process Technology [Member]
Gross Carrying Value	76,322		71,716
Accumulated Amortization	(21,965)		(20,622)
Net Carrying Amount	54,357		51,094
Aerospace [Member] | Other Intangibles [Member]
Gross Carrying Value	46,953		39,649
Accumulated Amortization	(38,072)		(37,718)
Net Carrying Amount	8,881		1,931
Energy [Member]
Gross Carrying Value	87,972		87,475
Accumulated Amortization	(52,726)		(50,861)
Net Carrying Amount	35,246		36,614
Energy [Member] | Customer Relationships [Member]
Gross Carrying Value	41,911		41,770
Accumulated Amortization	(27,416)		(26,623)
Net Carrying Amount	14,495		15,147
Energy [Member] | Intellectual Property [Member]
Gross Carrying Value	20,111		20,001
Accumulated Amortization	(13,629)		(13,229)
Net Carrying Amount	6,482		6,772
Energy [Member] | Process Technology [Member]
Gross Carrying Value	23,363		23,166
Accumulated Amortization	(10,266)		(9,706)
Net Carrying Amount	13,097		13,460
Energy [Member] | Other Intangibles [Member]
Gross Carrying Value	2,587		2,538
Accumulated Amortization	(1,415)		(1,303)
Net Carrying Amount	$ 1,172		$ 1,235