Segment Data - Revenues to Unaffiliated Customers and Long-lived Assets Including Property, Plant and Equipment (Detail) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Sep. 30, 2012		Sep. 30, 2011		Sep. 30, 2010
Geographic Information [Line Items]
Revenue	$ 7,708,382	[1]	$ 7,584,037	[1]	$ 7,124,385	[1]
Long-Lived Assets	6,038,838		5,762,097		5,145,444
United States [Member]
Geographic Information [Line Items]
Revenue	3,287,715		3,247,555		3,168,723
Long-Lived Assets	3,155,804		3,140,395		2,841,639
Europe [Member]
Geographic Information [Line Items]
Revenue	2,378,746		2,430,939		2,322,030
Long-Lived Assets	1,558,882		1,461,085		1,145,043
Asia Pacific [Member]
Geographic Information [Line Items]
Revenue	883,293		792,933		663,023
Long-Lived Assets	397,226		300,006		258,879
Others [Member]
Geographic Information [Line Items]
Revenue	1,158,628		1,112,610		970,609
Long-Lived Assets	623,974		590,544		617,323
Corporate [Member]
Geographic Information [Line Items]
Long-Lived Assets	$ 302,952		$ 270,067		$ 282,560

[1] Intersegment revenues are not material.