Fair Value Measurements (Schedule Of Carrying Values And Fair Values Of Financial Instruments) (Details) (USD $) In Millions, unless otherwise specified	Dec. 31, 2011	Sep. 30, 2011
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Other liabilities		$ 51.0
Carrying Value [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Long-term debt, including current portion	4,348.1	3,999.7
Other liabilities		51.0
Fair Value [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Long-term debt, including current portion	4,674.3	4,284.5
Other liabilities		51.0
Interest Rate Swap Contracts [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Derivative assets	52.1	48.2
Derivative liabilities	2.7	6.0
Interest Rate Swap Contracts [Member] | Carrying Value [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Derivative assets	52.1	48.2
Derivative liabilities	2.7	6.0
Interest Rate Swap Contracts [Member] | Fair Value [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Derivative assets	52.1	48.2
Derivative liabilities	2.7	6.0
Forward Exchange Contract [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Derivative assets	69.2	70.0
Derivative liabilities	43.0	37.8
Forward Exchange Contract [Member] | Carrying Value [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Derivative assets	69.2	70.0
Derivative liabilities	43.0	37.8
Forward Exchange Contract [Member] | Fair Value [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Derivative assets	69.2	70.0
Derivative liabilities	$ 43.0	$ 37.8