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Contingencies (Details) $ in Millions, $ in Millions | 12 Months Ended
--- | ---
Dec. 31, 2018 MXN ($) | Dec. 31, 2018 CAD ($) | Dec. 31, 2018 USD ($) | Dec. 31, 2017 USD ($)
Contingencies |  |  |  |
Income taxes paid |  |  | $ 28,500,000 | $ 38,200,000
Canada Revenue Agency Reassessment Action |  |  |  |
Contingencies |  |  |  |
Provincial income taxes assessed |  | $ 10.7 | 7,900,000 |
Income taxes paid | $ 154.3 |  | $ 12,100,000 |
Tax rate (as a percent) | 30.00% | 30.00% | 30.00% |
Contingent liability recorded |  |  | $ 0 |

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