| Components Of The Plans' Net Periodic Benefits Cost |
| | | | | | | | | | | | | | | | |
| Pension Benefits | | Other Postretirement Benefits | Three Months Ended June 30, (in millions) | 2015 | | 2014 | | 2015 | | 2014 | | | | Predecessor | | | | Predecessor | Components of Net Periodic Benefit Cost (Income) | | | | | | | | Service cost | $ | 1.3 |
| | $ | 1.2 |
| | $ | 0.3 |
| | $ | 0.2 |
| Interest cost | 3.0 |
| | 3.5 |
| | 1.0 |
| | 1.2 |
| Expected return on assets | (6.1 | ) | | (6.0 | ) | | (4.3 | ) | | (4.0 | ) | Amortization of prior service credit | (0.2 | ) | | (0.3 | ) | | — |
| | — |
| Recognized actuarial loss | 2.1 |
| | 1.7 |
| | — |
| | — |
| Total Net Periodic Benefit Cost (Income) | $ | 0.1 |
| | $ | 0.1 |
| | $ | (3.0 | ) | | $ | (2.6 | ) |
| | | | | | | | | | | | | | | | | | Pension Benefits | | Other Postretirement Benefits | Six Months Ended June 30, (in millions) | 2015 | | 2014 | | 2015 | | 2014 | | | | Predecessor | | | | Predecessor | Components of Net Periodic Benefit Cost (Income) | | | | | | | | Service cost | $ | 2.6 |
| | $ | 2.4 |
| | $ | 0.6 |
| | $ | 0.5 |
| Interest cost | 6.1 |
| | 6.9 |
| | 2.0 |
| | 2.4 |
| Expected return on assets | (12.2 | ) | | (11.9 | ) | | (8.6 | ) | | (8.1 | ) | Amortization of prior service credit | (0.4 | ) | | (0.5 | ) | | — |
| | — |
| Recognized actuarial loss | 4.1 |
| | 3.3 |
| | — |
| | — |
| Total Net Periodic Benefit Cost (Income) | $ | 0.2 |
| | $ | 0.2 |
| | $ | (6.0 | ) | | $ | (5.2 | ) |
|