Contingencies (Narrative) (Details) $ in Millions	3 Months Ended								9 Months Ended	12 Months Ended
	Dec. 31, 2019 USD ($)	Sep. 30, 2019 USD ($)	Jun. 30, 2019 USD ($)	Mar. 31, 2019 USD ($)	Dec. 31, 2018 USD ($)	Sep. 30, 2018 USD ($)	Jun. 30, 2018 USD ($)	Mar. 31, 2018 USD ($)	Sep. 30, 2018 USD ($)	Dec. 31, 2019 USD ($) lawsuit	Dec. 31, 2018 USD ($)	Dec. 31, 2017 USD ($)	Dec. 31, 2016 USD ($)	Apr. 18, 2018 USD ($)	Oct. 03, 2017 USD ($)	Dec. 31, 2012 USD ($)
Loss Contingencies [Line Items]
Revenue	$ 1,213.5	$ 1,188.0	$ 1,174.8	$ 1,186.9	$ 1,401.7	$ 1,424.2	$ 1,351.9	$ 1,393.5		$ 4,763.2	$ 5,571.3	$ 5,715.6
Other income (expense), net										$ 94.2	$ (7.1)	$ (34.6)	$ (172.9)
Number of litigation suits | lawsuit										124
Number of litigation suits, new | lawsuit										21
Number of litigation suits, dismissed | lawsuit										3
Assessment for 2012
Loss Contingencies [Line Items]
Assessment of contingencies, including penalties and accruing interest														$ 241.0		$ 305.0
Assessment Of Contingencies, Including Penalties And Accruing Interest, Adjustment														$ 64.0
Assessment for 2017
Loss Contingencies [Line Items]
Assessment of contingencies, including penalties and accruing interest															$ 238.0
IPI Tax on Cosmetics
Loss Contingencies [Line Items]
Estimated litigation liability						$ 195.0			$ 195.0
Revenue									168.0
Other income (expense), net									$ 27.0
Loss contingency, estimate of possible loss	267.0									$ 267.0
Loss contingency accrual, tax reserve	83.0									83.0
Brazil labor-related
Loss Contingencies [Line Items]
Estimated litigation liability	$ 10.0									$ 10.0