|
Fair Value Measurements (Schedule of the Carrying Values and Fair Values of Financial Instruments) (Details) (USD $)
In Millions, unless otherwise specified
|
Mar. 31, 2015
|
Sep. 30, 2014
|
| Carrying Value [Member] |
|
|
| Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] |
|
|
| Long-term debt, including current portion carrying value |
$ 4,669.2 |
$ 4,889.8 |
| Fair Value [Member] |
|
|
| Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] |
|
|
| Long-term debt, including current portion fair value |
4,941.9 |
5,130.7 |
| Interest rate management contract [Member] | Carrying Value [Member] |
|
|
| Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] |
|
|
| Derivative assets |
173.4 |
78.3 |
| Derivative liabilities |
0.1 |
19.1 |
| Interest rate management contract [Member] | Fair Value [Member] |
|
|
| Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] |
|
|
| Derivative assets |
173.4 |
78.3 |
| Derivative liabilities |
0.1 |
19.1 |
| Forward Exchange Contracts [Member] | Carrying Value [Member] |
|
|
| Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] |
|
|
| Derivative assets |
235.3 |
93.4 |
| Derivative liabilities |
232.7 |
66.8 |
| Forward Exchange Contracts [Member] | Fair Value [Member] |
|
|
| Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] |
|
|
| Derivative assets |
235.3 |
93.4 |
| Derivative liabilities |
$ 232.7 |
$ 66.8 |