Derivatives and Financial Instruments - Assets and Liabilities Measured at Fair Value (Details) - USD ($) $ in Millions	Jun. 30, 2020	Dec. 31, 2019
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Deferred compensation plan assets	$ 16.3	$ 17.3
Recurring
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Foreign currency contract liabilities	(0.1)	(3.4)
Foreign currency contract assets	14.6	7.6
Deferred compensation plan assets	16.3	17.3
Total recurring fair value measurements	30.8	21.5
Recurring | Level 1
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Foreign currency contract liabilities	0.0	0.0
Foreign currency contract assets	0.0	0.0
Deferred compensation plan assets	12.0	12.8
Total recurring fair value measurements	12.0	12.8
Recurring | Level 2
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Foreign currency contract liabilities	(0.1)	(3.4)
Foreign currency contract assets	14.6	7.6
Deferred compensation plan assets	0.0	0.0
Total recurring fair value measurements	14.5	4.2
Recurring | Level 3
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Foreign currency contract liabilities	0.0	0.0
Foreign currency contract assets	0.0	0.0
Deferred compensation plan assets	0.0	0.0
Total recurring fair value measurements	0.0	0.0
Recurring | NAV
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Foreign currency contract liabilities	0.0	0.0
Foreign currency contract assets	0.0	0.0
Deferred compensation plan assets	4.3	4.5
Total recurring fair value measurements	$ 4.3	$ 4.5