Reportable Segments and Geographic Information (Details 2) (USD $)	3 Months Ended								12 Months Ended
	Sep. 30, 2014	Jun. 30, 2014	Mar. 31, 2014	Dec. 31, 2013	Sep. 30, 2013	Jun. 30, 2013	Mar. 31, 2013	Dec. 31, 2012	Sep. 30, 2014	Sep. 30, 2013	Sep. 30, 2012
Geographic Information
Revenue	$ 2,562,500,000	$ 1,968,200,000	$ 1,872,200,000	$ 1,953,900,000	$ 2,079,100,000	$ 2,067,500,000	$ 1,989,600,000	$ 2,017,300,000	$ 8,356,783,000	$ 8,153,495,000	$ 8,218,180,000
Long-Lived Assets	2,571,200,000				2,390,500,000				2,571,200,000	2,390,500,000	2,390,300,000
UNITED STATES
Geographic Information
Revenue									4,933,700,000	4,829,600,000	4,756,000,000
Long-Lived Assets	1,603,700,000				1,477,300,000				1,603,700,000	1,477,300,000	1,496,800,000
Asia Pacific [Member]
Geographic Information
Revenue									1,338,200,000	1,507,200,000	1,715,100,000
Long-Lived Assets	340,500,000				361,000,000				340,500,000	361,000,000	374,900,000
CANADA
Geographic Information
Revenue									561,100,000	712,000,000	708,800,000
Long-Lived Assets	146,700,000				168,400,000				146,700,000	168,400,000	189,200,000
Europe [Member]
Geographic Information
Revenue									788,200,000	599,400,000	608,200,000
Long-Lived Assets	270,800,000				267,200,000				270,800,000	267,200,000	243,600,000
Other Foreign Countries [Member]
Geographic Information
Revenue									735,600,000	505,300,000	430,100,000
Long-Lived Assets	$ 209,500,000				$ 116,600,000				$ 209,500,000	$ 116,600,000	$ 85,800,000