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