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

12 Months Ended

Sep. 30, 2018

Receivables from customers and notes receivable, net [Abstract]

Allowance for Doubtful Accounts and Notes Receivables [Table Text Block]

Activity in the allowance for doubtful accounts for the years ended September 30, 2018, 2017, and 2016 was as follows:

(in millions)	2018			2017			2016
Balance, beginning of year	$	54.6		$	9.7		$	11.2
Provision for bad debts	3.9			51.0			4.2
Charge-offs	(0.3		)	(6.1		)	(5.7		)
Balance, end of year	$	58.2		$	54.6		$	9.7