Basis of Presentation and Consolidation and Recently Issued Accounting Standards (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended
	Dec. 31, 2013	Dec. 31, 2012
Revenues	$ 7,938.0	$ 12,552.8
Cost of sales of physical commodities	7,824.6	12,427.1
Number of different types of foreign currencies	130
Number of accounts for customers company-wide	20,000
Number of customers company-wide	11,000
Scenario, Adjustment [Member]
Revenues		166.7
Cost of sales of physical commodities		166.7
Scenario, Previously Reported [Member]
Revenues		12,719.5
Cost of sales of physical commodities		12,593.8
Restatement Adjustment [Member]
Revenues		12,552.8
Cost of sales of physical commodities		$ 12,427.1