XML 85 R61.htm IDEA: XBRL DOCUMENT v3.8.0.1
Financial Risk Management (Details) - USD ($)
$ in Millions
 12 Months Ended
Dec. 31, 2017
Dec. 31, 2016
Disclosure of nature and extent of risks arising from financial instruments [line items]    
Cumulative translation adjustment $ 77.2 $ 21.3
Investments $ 203.1 147.4
Foreign Exchange Risk    
Disclosure of nature and extent of risks arising from financial instruments [line items]    
Percentage of Interest-bearing deposits in US dollars 87.00%  
Percentage of Interest-bearing deposits in Canadian dollars 2.00%  
Percentage of Interest-bearing deposits in other currencies 11.00%  
Cumulative translation adjustment $ 77.2 $ 21.3
Interest Rate Risk    
Disclosure of nature and extent of risks arising from financial instruments [line items]    
Increase in interest rate used for sensitivity analysis (as a percent) 0.50% 0.50%
Decrease in interest rate used for sensitivity analysis (as a percent) 0.50% 0.50%
Interest rate sensitivities increase effect on net income $ (2.2) $ (1.0)
Interest rate sensitivities decrease effect on net income 2.2 1.0
Interest rate sensitivities increase effect on equity (2.2) (1.0)
Interest rate sensitivities decrease in effect on equity 2.2 1.0
Liquidity Risk    
Disclosure of nature and extent of risks arising from financial instruments [line items]    
Cash and cash equivalents and available-for-sale securities $ 511.1 253.0
Term of financial liabilities 1 year  
Capital Risk Management    
Disclosure of nature and extent of risks arising from financial instruments [line items]    
Cash and cash equivalents and available-for-sale securities $ 511.1 253.0
Investments 203.1 147.4
Liquid securities 168.1 114.6
Capital Risk Management | Credit Facility    
Disclosure of nature and extent of risks arising from financial instruments [line items]    
Undrawn borrowing facilities $ 1,000.0 $ 1,000.0