Contingencies (Narrative) (Details) $ in Millions	3 Months Ended	12 Months Ended
	Sep. 30, 2018 USD ($)	Dec. 31, 2020 USD ($) lawsuit	Dec. 31, 2019 USD ($)	Dec. 31, 2018 USD ($)	Apr. 30, 2018 USD ($)	Oct. 03, 2017 USD ($)	Dec. 31, 2012 USD ($)
Loss Contingencies [Line Items]
Revenue			$ 4,763.2	$ 5,571.3
Other (expense) income, net		$ (20.2)	94.2	$ (7.1)
Number of litigation suits | lawsuit		164
Number of litigation suits, new | lawsuit		31
Number of litigation suits, dismissed | lawsuit		14
Assessment for 2012
Loss Contingencies [Line Items]
Assessment of contingencies, including penalties and accruing interest							$ 189.0
Reduction of assessment of contingencies, including penalties and accruing interest					$ 50.0
Assessment for 2017
Loss Contingencies [Line Items]
Assessment of contingencies, including penalties and accruing interest						$ 189.0
IPI Tax on Cosmetics
Loss Contingencies [Line Items]
Estimated litigation liability	$ 195.0
Revenue	168.0
Other (expense) income, net	$ 27.0
Loss contingency, estimate of possible loss		$ 231.0
Loss contingency accrual, tax reserve		73.0	83.0
Brazil labor-related
Loss Contingencies [Line Items]
Estimated litigation liability		8.0	$ 10.0
Shareholder Litigation
Loss Contingencies [Line Items]
Litigation settlement, amount awarded to other party		14.5
Payments for legal settlements		$ 2.0