Receivables From Customers, Net and Notes Receivable, Net - Allowance for Customer Receivables (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended		6 Months Ended
	Mar. 31, 2014	Mar. 31, 2013	Mar. 31, 2014	Mar. 31, 2013	Sep. 30, 2013
Receivables from customers and notes receivable, net [Abstract]
Allowance for Doubtful Accounts Receivable	$ 1.6		$ 1.6		$ 1.1
Provision for Doubtful Accounts	0.4	0.1	0.7	0.1
Provision Increase (Decrease)	0.1		0.4
Allowance for Doubtful Accounts Receivable, Write-offs	$ 0.3		$ 0.3