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Commitments and Contingencies (Details 9) $ in Millions | 12 Months Ended |
--- | --- | ---
Dec. 31, 2016 USD ($) affiliate | Dec. 31, 2015 USD ($)
Loss Contingencies [Line Items] |  |
Minimum ownership interest in company | 80.00% |
Affiliate Pension Obligations |  |
Loss Contingencies [Line Items] |  |
Number of Entities | affiliate | 2 |
Aggregate underfunded pension obligation if pension plans voluntarily terminated by affiliate | $ | $ 613.4 | $ 589.2
IEP |  |
Loss Contingencies [Line Items] |  |
Ownership percentage held by controlling stockholder | 82.00% |

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