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Income Taxes - Deferred Tax Expense (Details) - USD ($) | 12 Months Ended
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Dec. 31, 2019 | Dec. 31, 2018
U.S. |  |
Current income tax expense (benefit) |  |
Deferred income tax expense (benefit) |  |
Canada |  |
Current income tax expense (benefit) |  |
Deferred income tax expense (benefit) |  |
Other Foreign |  |
Current income tax expense (benefit) |  |
Deferred income tax expense (benefit) |  |

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