| Components Of The Plans' Net Periodic Benefits Cost |
| | | | | | | | | | | | | | | | |
| Pension Benefits | | Other Postretirement Benefits | Three Months Ended September 30, (in millions) | 2015 | | 2014 | | 2015 | | 2014 | | | | Predecessor | | | | Predecessor | Components of Net Periodic Benefit Cost (Income) | | | | | | | | Service cost | $ | 1.4 |
| | $ | 1.3 |
| | $ | 0.2 |
| | $ | 0.3 |
| Interest cost | 3.3 |
| | 3.4 |
| | 1.0 |
| | 1.1 |
| Expected return on assets | (5.8 | ) | | (6.0 | ) | | (4.4 | ) | | (4.2 | ) | Amortization of prior service (credit) cost | (0.3 | ) | | (0.2 | ) | | — |
| | 0.1 |
| Recognized actuarial loss (gain) | 2.1 |
| | 1.6 |
| | (0.1 | ) | | (0.1 | ) | Total Net Periodic Benefit Cost (Income) | $ | 0.7 |
| | $ | 0.1 |
| | $ | (3.3 | ) | | $ | (2.8 | ) |
| | | | | | | | | | | | | | | | | | Pension Benefits | | Other Postretirement Benefits | Nine Months Ended September 30, (in millions) | 2015 | | 2014 | | 2015 | | 2014 | | | | Predecessor | | | | Predecessor | Components of Net Periodic Benefit Cost (Income) | | | | | | | | Service cost | $ | 4.0 |
| | $ | 3.7 |
| | $ | 0.8 |
| | $ | 0.8 |
| Interest cost | 9.4 |
| | 10.3 |
| | 3.0 |
| | 3.5 |
| Expected return on assets | (18.0 | ) | | (17.9 | ) | | (13.0 | ) | | (12.3 | ) | Amortization of prior service (credit) cost | (0.7 | ) | | (0.7 | ) | | — |
| | 0.1 |
| Recognized actuarial loss (gain) | 6.2 |
| | 4.9 |
| | (0.1 | ) | | (0.1 | ) | Total Net Periodic Benefit Cost (Income) | $ | 0.9 |
| | $ | 0.3 |
| | $ | (9.3 | ) | | $ | (8.0 | ) |
|