Other (Expense) Income, net (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended		12 Months Ended
	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020	Dec. 31, 2020
Other Income and Expenses [Abstract]
Net foreign exchange transaction (loss) gain	$ (0.5)	$ (1.4)	$ (0.5)	$ 5.2
Bank fee expense	(1.0)	(1.1)	(3.4)	(3.4)
Pension income (expense) other than service costs	0.7	(0.1)	3.3	1.1
Increase in fair value of equity investments	6.6	0.0	6.6	0.0	$ 15.1
Foreign currency exchange loss due to highly inflationary economies	(0.9)	(1.1)	(2.9)	(3.2)
Loss on debt redemption and refinancing activities	(14.7)	0.0	(14.7)	0.0
Other income	6.7	2.3	11.7	9.6
Other (expense)	(1.4)	(0.9)	(4.0)	(4.6)
Other (expense) income, net	(4.5)	(2.3)	(3.9)	4.7
Accounts, Notes, Loans and Financing Receivable [Line Items]
Other income	6.7	$ 2.3	$ 11.7	$ 9.6
Income Tax Receivable
Other Income and Expenses [Abstract]
Other income	5.0
Accounts, Notes, Loans and Financing Receivable [Line Items]
Other income	$ 5.0