Financial Instruments and Fair Value Measurement - Narrative (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Jan. 01, 2020
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Account receivable, net of allowances	$ 634.7	$ 683.0
Accounts receivable, allowances	12.5	7.7
Increase in accounts receivable, allowances	4.8
Investments carried at fair value	80.4	69.9
Purchase of trading securities held-for-investment	3.0	3.2
Proceeds from the sale of trading securities held-for-investment	2.0	1.3
Outstanding debt	1,436.9	1,540.4
Long-term debt, fair value	$ 1,569.5	$ 1,592.2
Accounting Standards Update 2016-13
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Accounts receivable, allowances			$ 1.3
Net Sales | Top Ten Customers | Customer Concentration Risk
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Concentration risk, percentage	42.00%