Receivables from customers, net and notes receivable, net (Tables)

12 Months Ended

Sep. 30, 2013

Receivables from customers and notes receivable, net [Abstract]

Allowance for Credit Losses on Financing Receivables [Table Text Block]

Activity in the allowance for doubtful accounts and notes for the years ended September 30, 2013, 2012 and 2011 was as follows:

(in millions)	2013		2012			2011
Balance, beginning of year	$	1.0	$	11.9		$	119.2
Provision for bad debts	0.2		0.4			7.2
Transfer in (1)	—		—			2.5
Deductions:
Charge-offs	—		(11.2		)	(113.3		)
Recoveries	—		(0.1		)	(3.7		)
Balance, end of year	$	1.2	$	1.0		$	11.9

(1) During the three months ended December 31, 2010, certain open position derivative contracts, which had a $2.5 million credit reserve as of September 30, 2010 were closed, and the deficit account balance was reclassified from financial instruments owned to a receivable from customer. Accordingly, the previously established credit reserve amount was transferred into the allowance for doubtful accounts during the three months ended December 31, 2010.