XML 70 R59.htm IDEA: XBRL DOCUMENT v3.19.2
Income Taxes (Narrative) (Details) - USD ($)
$ in Millions
3 Months Ended 6 Months Ended
Jun. 30, 2019
Jun. 30, 2019
Jun. 30, 2018
Income Tax Contingency [Line Items]      
Statutory tax rate 21.00% 21.00%  
2017 Tax Act, decrease of deferred tax expense     $ (156.0)
2017 Tax Act, increase in taxes payable     36.0
2017 Tax Act, net impact     $ 120.0
Canada Revenue Agency      
Income Tax Contingency [Line Items]      
Reduction of future deferred tax liability $ 13.0