PENSION PLANS AND RETIREMENT BENEFITS (Details 1) - USD ($) $ in Millions |
3 Months Ended | 6 Months Ended | ||
|---|---|---|---|---|
Jun. 30, 2017 |
Jun. 30, 2016 |
Jun. 30, 2017 |
Jun. 30, 2016 |
|
| Pension Benefits | ||||
| Service Cost | $ 4.1 | $ 2.7 | $ 8.4 | $ 5.9 |
| Interest Cost | 21.5 | 21.8 | 43.2 | 44.2 |
| Expected return on plans' assets | (39.3) | (39.1) | (78.4) | (78.9) |
| Defined Benefit Plan, Amortization of Prior Service Cost (Credit) | 0.0 | 0.1 | 0.0 | 0.1 |
| Recognized acturial loss | 6.8 | 5.0 | 13.4 | 10.3 |
| Net periodic benefit (income) cost | (6.9) | (9.5) | (13.4) | (18.4) |
| Other Postretirement Benefits | ||||
| Service Cost | 0.3 | 0.4 | 0.6 | 0.7 |
| Interest Cost | 0.4 | 0.4 | 0.8 | 0.9 |
| Expected return on plans' assets | 0.0 | 0.0 | 0.0 | 0.0 |
| Defined Benefit Plan, Amortization of Prior Service Cost (Credit) | (0.7) | 0.0 | (1.3) | 0.0 |
| Recognized acturial loss | 0.7 | 0.8 | 1.3 | 1.6 |
| Net periodic benefit (income) cost | $ 0.7 | $ 1.6 | $ 1.4 | $ 3.2 |