Receivables (Details 2) - USD ($) $ in Millions	3 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Sep. 30, 2016
Change in allowance for doubtful accounts
Allowance for doubtful accounts at beginning of period	$ 21.2	$ 20.3
Provision for doubtful accounts, net of recoveries	0.0	(0.9)
Charge-off of accounts	(0.3)	(0.3)
Foreign currency translation	(0.7)	(0.3)
Allowance for doubtful accounts at end of period	20.2	18.8
Finance Receivables
Accounts, Notes, Loans and Financing Receivable [Line Items]
Receivables on nonaccrual status	4.4		$ 4.5
Receivables past due 90 days or more and still accruing	0.0		0.0
Receivables subject to general reserves	41.9		3.1
Allowance for doubtful accounts	(0.7)		(0.1)
Receivables subject to specific reserves	4.4		4.5
Allowance for doubtful accounts	(1.4)		(0.9)
Change in allowance for doubtful accounts
Allowance for doubtful accounts at beginning of period	1.0	0.1
Provision for doubtful accounts, net of recoveries	1.1	0.0
Charge-off of accounts	0.0	0.0
Foreign currency translation	0.0	0.0
Allowance for doubtful accounts at end of period	2.1	0.1
Finance Receivables | Greater than 30 days and less than 60 days
Accounts, Notes, Loans and Financing Receivable [Line Items]
Aging of receivables that are past due:	0.0		0.0
Finance Receivables | Greater than 60 days and less than 90 days
Accounts, Notes, Loans and Financing Receivable [Line Items]
Aging of receivables that are past due:	0.0		0.0
Finance Receivables | Greater than 90 days
Accounts, Notes, Loans and Financing Receivable [Line Items]
Aging of receivables that are past due:	2.6		2.9
Notes Receivable
Accounts, Notes, Loans and Financing Receivable [Line Items]
Receivables on nonaccrual status	23.4		25.1
Receivables past due 90 days or more and still accruing	0.0		0.0
Receivables subject to general reserves	0.0		0.0
Allowance for doubtful accounts	0.0		0.0
Receivables subject to specific reserves	35.1		36.1
Allowance for doubtful accounts	(11.6)		(13.0)
Change in allowance for doubtful accounts
Allowance for doubtful accounts at beginning of period	13.0	12.7
Provision for doubtful accounts, net of recoveries	(0.6)	0.2
Charge-off of accounts	(0.1)	0.0
Foreign currency translation	(0.7)	(0.3)
Allowance for doubtful accounts at end of period	11.6	12.6
Notes Receivable | Greater than 30 days and less than 60 days
Accounts, Notes, Loans and Financing Receivable [Line Items]
Aging of receivables that are past due:	0.0		0.0
Notes Receivable | Greater than 60 days and less than 90 days
Accounts, Notes, Loans and Financing Receivable [Line Items]
Aging of receivables that are past due:	0.0		0.0
Notes Receivable | Greater than 90 days
Accounts, Notes, Loans and Financing Receivable [Line Items]
Aging of receivables that are past due:	0.2		$ 0.0
Trade and Other Receivables
Change in allowance for doubtful accounts
Allowance for doubtful accounts at beginning of period	7.2	7.5
Provision for doubtful accounts, net of recoveries	(0.5)	(1.1)
Charge-off of accounts	(0.2)	(0.3)
Foreign currency translation	0.0	0.0
Allowance for doubtful accounts at end of period	$ 6.5	$ 6.1