Pension And Other Postretirement Benefits (Schedule Of Pension Plan And Postretirement Plan Asset Mix) (Details) - USD ($)
$ in Millions |
Dec. 31, 2015 |
Dec. 31, 2014 |
| Defined Benefit Plan Disclosure [Line Items] |
|
|
| Fair value of asset |
$ 508.4
|
$ 516.4
|
| Pension Plan |
|
|
| Defined Benefit Plan Disclosure [Line Items] |
|
|
| Percentage of total asset |
100.00%
|
100.00%
|
| Fair value of asset |
$ 294.3
|
$ 304.8
|
| Other Postretirement Benefits |
|
|
| Defined Benefit Plan Disclosure [Line Items] |
|
|
| Percentage of total asset |
100.00%
|
100.00%
|
| Fair value of asset |
$ 213.9
|
$ 211.6
|
| Domestic Equities [Member] | Pension Plan |
|
|
| Defined Benefit Plan Disclosure [Line Items] |
|
|
| Percentage of total asset |
39.40%
|
41.10%
|
| Fair value of asset |
$ 115.9
|
$ 125.2
|
| Domestic Equities [Member] | Other Postretirement Benefits |
|
|
| Defined Benefit Plan Disclosure [Line Items] |
|
|
| Percentage of total asset |
44.60%
|
47.20%
|
| Fair value of asset |
$ 95.3
|
$ 99.9
|
| International Equities [Member] | Pension Plan |
|
|
| Defined Benefit Plan Disclosure [Line Items] |
|
|
| Percentage of total asset |
17.50%
|
18.10%
|
| Fair value of asset |
$ 51.4
|
$ 55.0
|
| International Equities [Member] | Other Postretirement Benefits |
|
|
| Defined Benefit Plan Disclosure [Line Items] |
|
|
| Percentage of total asset |
18.70%
|
18.40%
|
| Fair value of asset |
$ 40.1
|
$ 38.9
|
| Fixed Income [Member] | Pension Plan |
|
|
| Defined Benefit Plan Disclosure [Line Items] |
|
|
| Percentage of total asset |
34.40%
|
34.40%
|
| Fair value of asset |
$ 101.5
|
$ 105.0
|
| Fixed Income [Member] | Other Postretirement Benefits |
|
|
| Defined Benefit Plan Disclosure [Line Items] |
|
|
| Percentage of total asset |
33.60%
|
34.10%
|
| Fair value of asset |
$ 71.8
|
$ 72.2
|
| Real Estate/Private Equity/Hedge Funds [Member] | Pension Plan |
|
|
| Defined Benefit Plan Disclosure [Line Items] |
|
|
| Percentage of total asset |
|
5.00%
|
| Fair value of asset |
|
$ 15.4
|
| Real Estate/Private Equity/Hedge Funds [Member] | Other Postretirement Benefits |
|
|
| Defined Benefit Plan Disclosure [Line Items] |
|
|
| Percentage of total asset |
|
0.00%
|
| Fair value of asset |
|
$ 0.0
|
| Cash/Other [Member] | Pension Plan |
|
|
| Defined Benefit Plan Disclosure [Line Items] |
|
|
| Percentage of total asset |
8.70%
|
1.40%
|
| Fair value of asset |
$ 25.5
|
$ 4.2
|
| Cash/Other [Member] | Other Postretirement Benefits |
|
|
| Defined Benefit Plan Disclosure [Line Items] |
|
|
| Percentage of total asset |
3.10%
|
0.30%
|
| Fair value of asset |
$ 6.7
|
$ 0.6
|