Reportable Segments and Geographic Information (Details 2) (USD $)	3 Months Ended								12 Months Ended
	Sep. 30, 2013	Jun. 30, 2013	Mar. 31, 2013	Dec. 31, 2012	Sep. 30, 2012	Jun. 30, 2012	Mar. 31, 2012	Dec. 31, 2011	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2011
Geographic Information
Revenue	$ 2,079,100,000	$ 2,067,500,000	$ 1,989,600,000	$ 2,017,300,000	$ 2,082,900,000	$ 2,095,200,000	$ 2,010,900,000	$ 2,029,200,000	$ 8,153,495,000	$ 8,218,180,000	$ 8,037,374,000
Long-Lived Assets	2,390,500,000				2,390,300,000				2,390,500,000	2,390,300,000	2,716,300,000
United States
Geographic Information
Revenue									4,829,600,000	4,756,000,000	4,806,400,000
Long-Lived Assets	1,477,300,000				1,496,800,000				1,477,300,000	1,496,800,000	1,683,200,000
Asia Pacific
Geographic Information
Revenue									1,507,200,000	1,715,100,000	1,421,000,000
Long-Lived Assets	361,000,000				374,900,000				361,000,000	374,900,000	349,500,000
Canada
Geographic Information
Revenue									712,000,000	708,800,000	686,400,000
Long-Lived Assets	168,400,000				189,200,000				168,400,000	189,200,000	182,000,000
Europe
Geographic Information
Revenue									599,400,000	608,200,000	643,000,000
Long-Lived Assets	267,200,000				243,600,000				267,200,000	243,600,000	372,200,000
Other Foreign Countries
Geographic Information
Revenue									505,300,000	430,100,000	480,600,000
Long-Lived Assets	$ 116,600,000				$ 85,800,000				$ 116,600,000	$ 85,800,000	$ 129,400,000