Receivables (Details 2) $ in Millions	12 Months Ended
	Sep. 30, 2016 USD ($) Party	Sep. 30, 2015 USD ($)
Change in allowance for doubtful accounts
Allowance for doubtful accounts at beginning of period	$ 20.3	$ 21.8
Provision for doubtful accounts, net of recoveries	2.7	2.0
Charge-off of accounts	(1.9)	(2.2)
Foreign currency translation	0.1	(1.3)
Allowance for doubtful accounts at end of period	$ 21.2	20.3
Credit Concentration Risk [Member] | Notes receivables
Receivable aging and accrual status
Concentration of risk	87.00%
Numbers of parties in receivable | Party	4
Finance receivables
Receivable aging and accrual status
Receivables on nonaccrual status	$ 4.5	1.1
Receivables past due 90 days or more and still accruing	0.0	0.0
Receivables subject to general reserves	3.1	6.2
Allowance for doubtful accounts	(0.1)	(0.1)
Financing Receivable, Individually Evaluated for Impairment	4.5	1.2
Allowance for doubtful accounts	(0.9)	0.0
Financing Receivable, Modifications, Recorded Investment	4.0
Change in allowance for doubtful accounts
Allowance for doubtful accounts at beginning of period	0.1	0.0
Provision for doubtful accounts, net of recoveries	0.9	0.1
Charge-off of accounts	0.0	0.0
Foreign currency translation	0.0	0.0
Allowance for doubtful accounts at end of period	1.0	0.1
Finance receivables | Financing Receivables, 30 to 59 Days Past Due [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Financing Receivable, Recorded Investment, Past Due	0.0	0.0
Finance receivables | Financing Receivables, 60 to 89 Days Past Due [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Financing Receivable, Recorded Investment, Past Due	0.0	0.0
Finance receivables | Financing Receivables, Equal to Greater than 90 Days Past Due [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Financing Receivable, Recorded Investment, Past Due	2.9	0.0
Notes receivables
Receivable aging and accrual status
Receivables on nonaccrual status	25.1	22.9
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
Financing Receivable, Individually Evaluated for Impairment	36.1	29.6
Allowance for doubtful accounts	(13.0)	(12.7)
Financing Receivable, Modifications, Recorded Investment	13.0
Change in allowance for doubtful accounts
Allowance for doubtful accounts at beginning of period	12.7	13.6
Provision for doubtful accounts, net of recoveries	1.3	0.3
Charge-off of accounts	(1.0)	0.0
Foreign currency translation	0.0	(1.2)
Allowance for doubtful accounts at end of period	13.0	12.7
Notes receivables | Financing Receivables, 30 to 59 Days Past Due [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Financing Receivable, Recorded Investment, Past Due	0.0	0.0
Notes receivables | Financing Receivables, 60 to 89 Days Past Due [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Financing Receivable, Recorded Investment, Past Due	0.0	0.0
Notes receivables | Financing Receivables, Equal to Greater than 90 Days Past Due [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Financing Receivable, Recorded Investment, Past Due	0.0	0.0
Trade and other receivables
Change in allowance for doubtful accounts
Allowance for doubtful accounts at beginning of period	7.5	8.2
Provision for doubtful accounts, net of recoveries	0.5	1.6
Charge-off of accounts	(0.9)	(2.2)
Foreign currency translation	0.1	(0.1)
Allowance for doubtful accounts at end of period	$ 7.2	$ 7.5