Fair Value Measurement - Narrative (Details)	3 Months Ended	9 Months Ended
	Sep. 30, 2019 USD ($)	Sep. 30, 2020 USD ($) contract	Sep. 30, 2019 USD ($)	Jan. 01, 2020 USD ($)	Dec. 31, 2019 USD ($)
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Accounts receivable, net		$ 711,400,000			$ 683,000,000.0
Accounts receivable, allowances		14,700,000			7,700,000
Increase in accounts receivable, allowances		7,000,000.0
Available for sale debt securities		48,700,000			50,700,000
Available for sale debt securities, amortized cost		47,400,000			50,100,000
Available for sale debt securities, allowance for credit losses		0
Available for sale debt securities, unrealized losses		100,000			100,000
Available for sale debt securities with unrealized losses, fair value		3,800,000			3,600,000
Pre-tax loss on disposal of available-for-sale investment	$ 5,000,000.0
Trading securities		20,700,000			19,200,000
Purchase of trading securities related to deferred compensation plans		2,700,000	$ 3,100,000
Proceeds from securities sold		$ 2,000,000.0	$ 1,000,000.0
Number of foreign exchange contracts held (in contracts) | contract		20
Long-term debt, including current portion of long-term debt		$ 1,436,300,000			1,506,000,000.0
Forward exchange contract
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative, notional amount		21,800,000
Senior Notes
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Current portion of long-term debt					34,400,000
Long-term debt, including current portion of long-term debt		1,436,300,000			1,540,400,000
Long-term debt, fair value		$ 1,553,500,000			$ 1,592,200,000
Accounting Standards Update 2016-13
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Accounts receivable, allowances				$ 1,300,000