Accounts Payable and Other Current Liabilities - Schedule of Other Payables and Current Liabilities (Details) - USD ($) $ in Millions	Sep. 30, 2016	Sep. 30, 2015
Other Liabilities Disclosure [Abstract]
Accounts Payable	$ 583.5	$ 623.9
Accrued expenses and other	172.9	196.7
Accrued interest	146.5	123.9
Income taxes payable	68.3	93.4
Accrued Income Taxes, Current	16.0	16.0
Restructuring and related charges	2.6	8.1
Accounts payable and other current liabilities (Note 14)	$ 989.8	$ 1,062.0