Goodwill and Other Intangible Assets (Details) (USD $)	3 Months Ended		6 Months Ended
	Mar. 31, 2014	Mar. 31, 2013	Mar. 31, 2014	Mar. 31, 2013	Sep. 30, 2013
Goodwill [Line Items]
Goodwill at September 30, 2013			$ 2,944,970,000
Goodwill, Acquired During Period			5,689,000
Goodwill, Translation Adjustments			(1,403,000)
Goodwill at March 31, 2014	2,949,256,000		2,949,256,000
Indefinite-lived intangibles-trade names	343,735,000		343,735,000		343,892,000
Finite Lived Intangible Assets [Line Items]
Finite Lived Intangible Assets Accumulated Amortization	137,140,000		137,140,000		124,309,000
Intangible Assets Gross Excluding Goodwill	683,029,000		683,029,000		679,052,000
Intangible Assets Net Excluding Goodwill	545,889,000		545,889,000		554,743,000
Amortization of Intangible Assets	6,526,000	6,799,000	13,157,000	13,609,000
Future Amortization Expense Year One	25,900,000		25,900,000
Future Amortization Expense Year Two	22,400,000		22,400,000
Future Amortization Expense Year Three	21,600,000		21,600,000
Future Amortization Expense Year Four	17,800,000		17,800,000
Future Amortization Expense Year Five	15,500,000		15,500,000
Future Amortization Expense, after Year Five	112,100,000		112,100,000
Customer Relationships [Member]
Finite Lived Intangible Assets [Line Items]
Finite Lived Intangible Assets Gross	268,465,000		268,465,000		265,810,000
Finite Lived Intangible Assets Accumulated Amortization	89,724,000		89,724,000		80,767,000
Finite Lived Intangible Assets Net	178,741,000		178,741,000		185,043,000
Other Finite Lived Intangibles [Member]
Finite Lived Intangible Assets [Line Items]
Finite Lived Intangible Assets Gross	70,829,000		70,829,000		69,350,000
Finite Lived Intangible Assets Accumulated Amortization	47,416,000		47,416,000		43,542,000
Finite Lived Intangible Assets Net	23,413,000		23,413,000		25,808,000
Pharmaceutical Distribution [Member]
Goodwill [Line Items]
Goodwill at September 30, 2013			2,400,926,000
Goodwill, Acquired During Period			0
Goodwill, Translation Adjustments			0
Goodwill at March 31, 2014	2,400,926,000		2,400,926,000
All Other Segments [Member]
Goodwill [Line Items]
Goodwill at September 30, 2013			544,044,000
Goodwill, Acquired During Period			5,689,000
Goodwill, Translation Adjustments			(1,403,000)
Goodwill at March 31, 2014	$ 548,330,000		$ 548,330,000