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Income Taxes NOL and credit carryovers (Details) - USD ($) $ in Millions | Dec. 31, 2019 | Dec. 31, 2018
--- | --- | ---
Operating Loss Carryforwards [Line Items] |  |
Deferred Tax Assets, Operating Loss Carryforwards | $ 28.0 | $ 16.0
Federal NOL carryover valuation allowance | (5.0) |
Valuation Allowance, Amount | (11.0) | $ (12.0)
Federal NOL carryover | 28.0 |
Deferred Tax Liability Not Recognized, Amount of Unrecognized Deferred Tax Liability, Undistributed Earnings of Domestic Subsidiaries | 22.0 |
State and Local Jurisdiction [Member] |  |
Operating Loss Carryforwards [Line Items] |  |
Deferred Tax Assets, Operating Loss Carryforwards | 10.0 |
Operating Loss Carryforwards, Valuation Allowance | 0.0 |
Canada Revenue Agency [Member] |  |
Operating Loss Carryforwards [Line Items] |  |
Federal NOL carryover valuation allowance | 0.0 |
Deferred Tax Assets, Tax Credit Carryforwards | 4.0 |
State and Local Jurisdiction [Member] |  |
Operating Loss Carryforwards [Line Items] |  |
Federal NOL carryover valuation allowance | 0.0 |
Deferred Tax Assets, Tax Credit Carryforwards | 1.0 |
Capital Loss Carryforward [Member] | Canada Revenue Agency [Member] |  |
Operating Loss Carryforwards [Line Items] |  |
Deferred Tax Assets, Capital Loss Carryforwards | 5.0 |
Valuation Allowance, Amount | (5.0) |
Secretariat of the Federal Revenue Bureau of Brazil [Member] |  |
Operating Loss Carryforwards [Line Items] |  |
Deferred Tax Assets, Operating Loss Carryforwards | 5.0 |
Operating Loss Carryforwards, Valuation Allowance | $ 0.0 |

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