Derivative Instruments - Gains and Losses text (Details) - USD ($)	3 Months Ended		6 Months Ended
	Jun. 30, 2020	Jun. 30, 2019	Jun. 30, 2020	Jun. 30, 2019
Derivative, Gain (Loss) on Derivative, Net [Abstract]
Foreign exchange transaction gains (losses)	$ 8,700,000	$ 2,600,000	$ (5,300,000)	$ (500,000)
Information regarding changes in fair value of derivatives
Current foreign currency translation gain			0
Maximum
Derivative, Gain (Loss) on Derivative, Net [Abstract]
Reclassification expected during next 12 months			(2,900,000)
Foreign Exchange Forward Contracts | Not Designated as Hedging Instruments - Economic
Derivative, Gain (Loss) on Derivative, Net [Abstract]
Gain (loss) from settlements and changes in fair value	$ (8,100,000)	$ (2,400,000)	$ 5,700,000	$ 300,000