Other Commitments And Contingencies (Existence and Expiration of Commercial Commitments) (Details) $ in Millions |
Mar. 31, 2016
USD ($)
|
|---|---|
| Other Commitments and Contingencies [Line Items] | |
| 2016 | $ 18.1 |
| 2017 | 0.0 |
| 2018 | 500.0 |
| 2019 | 0.0 |
| 2020 | 750.0 |
| After | 1,500.0 |
| Total | 2,768.1 |
| Guarantee of Indebtedness of Others | |
| Other Commitments and Contingencies [Line Items] | |
| 2016 | 0.0 |
| 2017 | 0.0 |
| 2018 | 500.0 |
| 2019 | 0.0 |
| 2020 | 750.0 |
| After | 1,500.0 |
| Total | 2,750.0 |
| Letters of Credit | |
| Other Commitments and Contingencies [Line Items] | |
| 2016 | 18.1 |
| 2017 | 0.0 |
| 2018 | 0.0 |
| 2019 | 0.0 |
| 2020 | 0.0 |
| After | 0.0 |
| Total | $ 18.1 |