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Commitments and Contingencies (Details 7) - EHS - USD ($) $ in Millions | Dec. 31, 2016 | Dec. 31, 2015
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Estimated future payments for environmental obligations |  |
2016 | $ 1.5 |
2017 | 1.6 |
2018 | 1.3 |
2019 | 0.1 |
2020 | 0.1 |
Thereafter | 0.3 |
Undiscounted total | 4.9 |
Less amounts representing interest at 1.47% | 0.1 |
Accrued environmental liabilities at the end of the year | $ 4.8 | $ 3.6
Interest rate (as a percent) | 1470000.00% |

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