Derivative Financial Instruments Derivative Financial Instruments (Fair Value of Outstanding Derivative Contracts) (Details) - USD ($) $ in Millions	Jun. 30, 2019	Sep. 30, 2018
Designated as Hedging Instrument [Member]
Derivative [Line Items]
Derivative Assets	$ 1.9
Other Long-Term Assets [Member] | Designated as Hedging Instrument [Member] | Cross-Currency Swap [Member]
Derivative [Line Items]
Derivative Assets	0.0	$ 5.8
Other Long-Term Assets [Member] | Designated as Hedging Instrument [Member] | Foreign Currency Contract - Other [Member]
Derivative [Line Items]
Derivative Assets	5.7	4.6
Other Long-Term Assets [Member] | Designated as Hedging Instrument [Member] | Interest Rate Swap [Member]
Derivative [Line Items]
Derivative Assets	4.6	0.0
Prepaid Expenses and Other Current Assets [Member] | Designated as Hedging Instrument [Member] | Foreign Currency Contract - Other [Member]
Derivative [Line Items]
Derivative Assets	7.3	9.0
Prepaid Expenses and Other Current Assets [Member] | Not Designated as Hedging Instrument [Member] | Foreign Currency Contract - Other [Member]
Derivative [Line Items]
Derivative Assets	5.8	13.7
Prepaid Expenses and Other Current Assets [Member] | Not Designated as Hedging Instrument [Member] | Dairy Contracts [Member]
Derivative [Line Items]
Derivative Assets	0.1	0.2
Prepaid Expenses and Other Current Assets [Member] | Not Designated as Hedging Instrument [Member] | Diesel and Other Contracts [Member]
Derivative [Line Items]
Derivative Assets	0.3	1.6
Other Long-Term Liabilities [Member] | Designated as Hedging Instrument [Member] | Cross-Currency Swap [Member]
Derivative [Line Items]
Derivative Liabilities	11.9	9.3
Other Long-Term Liabilities [Member] | Designated as Hedging Instrument [Member] | Foreign Currency Contract - Other [Member]
Derivative [Line Items]
Derivative Liabilities	1.7	1.7
Other Long-Term Liabilities [Member] | Designated as Hedging Instrument [Member] | Interest Rate Swap [Member]
Derivative [Line Items]
Derivative Liabilities	0.0	32.5
Other Long-Term Liabilities [Member] | Not Designated as Hedging Instrument [Member] | Foreign Currency Contract - Other [Member]
Derivative [Line Items]
Derivative Liabilities	0.6	0.0
Other Current Liabilities [Member] | Designated as Hedging Instrument [Member] | Foreign Currency Contract - Other [Member]
Derivative [Line Items]
Derivative Liabilities	2.7	3.6
Other Current Liabilities [Member] | Not Designated as Hedging Instrument [Member] | Foreign Currency Contract - Other [Member]
Derivative [Line Items]
Derivative Liabilities	6.2	2.5
Other Current Liabilities [Member] | Not Designated as Hedging Instrument [Member] | Dairy Contracts [Member]
Derivative [Line Items]
Derivative Liabilities	0.0	0.1
Other Current Liabilities [Member] | Not Designated as Hedging Instrument [Member] | Diesel and Other Contracts [Member]
Derivative [Line Items]
Derivative Liabilities	$ 2.4	$ 0.3