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Employee Benefits Schedule of Federal Subsidies (Tables) | 12 Months Ended
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Dec. 31, 2015
Schedule of Net Benefit Costs [Abstract] |
Schedule of federal subsidies [Table Text Block] | The following federal subsidies are expected to be received in the years indicated below.
Years |  | Domestic Postretirement Benefit Plan
2016 |  | $ | 0.4 |
2017 |  | 0.4 |
2018 |  | 0.4 |
2019 |  | 0.4 |
2020 |  | 0.4 |
2021 - 2025 |  | 1.9 |

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