Derivatives - Derivatives by Balance Sheet Location (Details) - USD ($) $ in Millions	Sep. 30, 2019	Dec. 31, 2018
Derivatives, Fair Value [Line Items]
Asset Derivatives	$ 15.4	$ 4.9
Liability Derivatives	9.7	10.1
Derivatives designated as hedges
Derivatives, Fair Value [Line Items]
Asset Derivatives	15.3	4.8
Liability Derivatives	9.6	10.1
Derivatives not designated as hedges
Derivatives, Fair Value [Line Items]
Asset Derivatives	0.1	0.1
Liability Derivatives	0.1	0.0
Foreign exchange contracts | Derivatives designated as hedges | Accounts receivable, net
Derivatives, Fair Value [Line Items]
Asset Derivatives	4.0	2.0
Foreign exchange contracts | Derivatives designated as hedges | Other assets
Derivatives, Fair Value [Line Items]
Asset Derivatives	11.3	1.0
Foreign exchange contracts | Derivatives designated as hedges | Accrued expenses
Derivatives, Fair Value [Line Items]
Liability Derivatives	4.0	1.3
Foreign exchange contracts | Derivatives designated as hedges | Other liabilities
Derivatives, Fair Value [Line Items]
Liability Derivatives	3.7	8.8
Foreign exchange contracts | Derivatives not designated as hedges | Accounts receivable, net
Derivatives, Fair Value [Line Items]
Asset Derivatives	0.1	0.1
Foreign exchange contracts | Derivatives not designated as hedges | Accrued expenses
Derivatives, Fair Value [Line Items]
Liability Derivatives	0.1	0.0
Interest rate contracts | Derivatives designated as hedges | Other assets
Derivatives, Fair Value [Line Items]
Asset Derivatives	0.0	1.8
Interest rate contracts | Derivatives designated as hedges | Other liabilities
Derivatives, Fair Value [Line Items]
Liability Derivatives	$ 1.9	$ 0.0