XML 61 R50.htm IDEA: XBRL DOCUMENT v3.8.0.1
Derivatives and Risk Management (Narrative) (Details) - Derivatives Not Designated as Hedging Instruments - USD ($)
$ in Millions
3 Months Ended 9 Months Ended
Sep. 30, 2017
Sep. 30, 2016
Sep. 30, 2017
Sep. 30, 2016
Dec. 31, 2016
Foreign Exchange Forward          
Derivative [Line Items]          
Notional amount $ 239.0   $ 239.0   $ 489.1
Foreign Exchange Contract | Foreign exchange and other (losses) gains          
Derivative [Line Items]          
Gain (loss) on derivative $ (0.7) $ (1.8) $ (7.9) $ 0.4