Receivables - Customer Financing, Recorded Investment (Details) (USD $) In Millions, unless otherwise specified	Sep. 30, 2014	Sep. 30, 2013
Financing Receivable, Individually Evaluated for Impairment	$ 103.8	$ 82.4
Financing Receivable, Collectively Evaluated for Impairment	304.7	391.0
Total	408.5	473.4
Financing Receivable, Allowance For Credit Losses, Individually Evaluated for Impairment	75.1	63.4
Financing Receivable, Allowance for Credit Losses, Collectively Evaluated for Impairment	17.0	15.1
Total	92.1	78.5
Deferred interest and fees	6.5	7.0
RecordedInvestmentContractsMember [Member]
Financing Receivable, Individually Evaluated for Impairment	28.3	7.4
Financing Receivable, Collectively Evaluated for Impairment	304.7	375.8
Total	333.0	383.2
Financing Receivable, Allowance For Credit Losses, Individually Evaluated for Impairment	14.6	2.6
Financing Receivable, Allowance for Credit Losses, Collectively Evaluated for Impairment	17.0	14.4
Total	31.6	17.0
RecordedInvestmentNotesMember [Member]
Financing Receivable, Individually Evaluated for Impairment	75.5	75.0
Financing Receivable, Collectively Evaluated for Impairment	0	15.2
Total	75.5	90.2
Financing Receivable, Allowance For Credit Losses, Individually Evaluated for Impairment	60.5	60.8
Financing Receivable, Allowance for Credit Losses, Collectively Evaluated for Impairment	0	0.7
Total	$ 60.5	$ 61.5