Pension And Other Postretirement Benefits (Components Of The Plans' Net Periodic Benefits Cost) (Details) - USD ($)
$ in Millions |
3 Months Ended |
9 Months Ended |
Sep. 30, 2015 |
Sep. 30, 2014 |
Sep. 30, 2015 |
Sep. 30, 2014 |
| Pension Plan |
|
|
|
|
| Defined Benefit Plan Disclosure [Line Items] |
|
|
|
|
| Service Cost |
$ 1.4
|
|
$ 4.0
|
|
| Interest cost |
3.3
|
|
9.4
|
|
| Expected return on assets |
(5.8)
|
|
(18.0)
|
|
| Amortization of prior service (credit) cost |
(0.3)
|
|
(0.7)
|
|
| Recognized actuarial loss (gain) |
2.1
|
|
6.2
|
|
| Total Net Periodic Benefits Cost |
0.7
|
|
0.9
|
|
| Other Postretirement Benefits |
|
|
|
|
| Defined Benefit Plan Disclosure [Line Items] |
|
|
|
|
| Service Cost |
0.2
|
|
0.8
|
|
| Interest cost |
1.0
|
|
3.0
|
|
| Expected return on assets |
(4.4)
|
|
(13.0)
|
|
| Amortization of prior service (credit) cost |
0.0
|
|
0.0
|
|
| Recognized actuarial loss (gain) |
(0.1)
|
|
(0.1)
|
|
| Total Net Periodic Benefits Cost |
$ (3.3)
|
|
$ (9.3)
|
|
| Predecessor | Pension Plan |
|
|
|
|
| Defined Benefit Plan Disclosure [Line Items] |
|
|
|
|
| Service Cost |
|
$ 1.3
|
|
$ 3.7
|
| Interest cost |
|
3.4
|
|
10.3
|
| Expected return on assets |
|
(6.0)
|
|
(17.9)
|
| Amortization of prior service (credit) cost |
|
(0.2)
|
|
(0.7)
|
| Recognized actuarial loss (gain) |
|
1.6
|
|
4.9
|
| Total Net Periodic Benefits Cost |
|
0.1
|
|
0.3
|
| Predecessor | Other Postretirement Benefits |
|
|
|
|
| Defined Benefit Plan Disclosure [Line Items] |
|
|
|
|
| Service Cost |
|
0.3
|
|
0.8
|
| Interest cost |
|
1.1
|
|
3.5
|
| Expected return on assets |
|
(4.2)
|
|
(12.3)
|
| Amortization of prior service (credit) cost |
|
0.1
|
|
0.1
|
| Recognized actuarial loss (gain) |
|
(0.1)
|
|
(0.1)
|
| Total Net Periodic Benefits Cost |
|
$ (2.8)
|
|
$ (8.0)
|