Other Operating Income (Expense) (Details) - USD ($) $ in Millions	3 Months Ended	6 Months Ended	12 Months Ended
	Sep. 30, 2020	Jun. 30, 2018	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Effect of Fourth Quarter Events [Line Items]
Foreign currency transaction losses			$ (11.2)	$ (22.9)	$ (13.9)
Derivative instrument gains (losses)			(3.0)	6.9	7.7
Gains on sale of property and equity investment			0.9	5.8	4.0
Impairment losses			(11.6)	(7.7)	(6.5)
Share in earnings of equity method affiliates			0.8	0.9	1.9
Royalty Income			4.8	5.1	4.5
Other			3.7	2.5	0.6
Other operating income (expense)			(15.6)	(9.4)	(1.7)
ARGENTINA | Argentina, Pesos
Effect of Fourth Quarter Events [Line Items]
Foreign currency transaction losses	$ 10.4		10.4	4.7
Currency remeasurement gain (loss)			$ (7.7)	$ (11.3)	(6.2)
Venezuela | Venezuelan Bolívar Soberano
Effect of Fourth Quarter Events [Line Items]
Currency remeasurement gain (loss)		$ 2.2
Mexico
Effect of Fourth Quarter Events [Line Items]
Gains on sale of property and equity investment					$ 3.0