Annual report pursuant to Section 13 and 15(d)

Derivative Financial Instruments - Summary of Gain (Loss) on Derivative Instruments (Details)

v3.10.0.1
Derivative Financial Instruments - Summary of Gain (Loss) on Derivative Instruments (Details) - Foreign exchange contracts - USD ($)
$ in Millions
12 Months Ended
Dec. 31, 2018
Dec. 31, 2017
Dec. 31, 2016
Cash flow hedges | Cash flow hedging      
Derivative Instruments, Gain (Loss) [Line Items]      
Gains (losses) recognized in other comprehensive income (OCI) $ 2.0 $ (1.9) $ (1.7)
(Losses) gains reclassified from AOCI (0.3) (0.4) 0.7
Non-designated hedges      
Derivative Instruments, Gain (Loss) [Line Items]      
(Losses) gains recognized in income $ 1.5 $ (2.0) $ 0.8