Leases (Narratives) (Details) - USD ($) $ in Millions	12 Months Ended
	Sep. 30, 2015	Sep. 30, 2014	Sep. 30, 2013
Leases [Abstract]
Capital leases, plant and equipment	$ 12.8	$ 17.0
Capital leases, accumulated depreciation	4.3	7.2
Operating leases, rent expense	95.5	100.7	$ 98.6
Accounts, Notes, Loans and Financing Receivable [Line Items]
Lessor, lease payments collected	148.1	134.4	120.0
Receivable Balance Reduction [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Lessor, lease payments collected	$ 69.3	$ 72.7	$ 61.1