Results of Operations by Quarter (Unaudited) (Components Impacting Operating Profit) (Details) - USD ($) $ in Millions	3 Months Ended								12 Months Ended
	Dec. 31, 2018	Sep. 30, 2018	Jun. 30, 2018	Mar. 31, 2018	Dec. 31, 2017	Sep. 30, 2017	Jun. 30, 2017	Mar. 31, 2017	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Restructuring Cost and Reserve [Line Items]
Brazil IPI release									$ (194.7)	$ 0.0	$ 0.0
Total costs to implement restructuring initiatives	$ 126.1	$ 19.8	$ 23.7	$ 10.9	$ 23.7	$ 6.2	$ 20.3	$ 10.0	180.5	60.2	77.4
Loss contingency					0.0	0.0	18.2	0.0	0.0	18.2	$ 0.0
Sales
Restructuring Cost and Reserve [Line Items]
Brazil IPI release	0.0	(168.4)	0.0	0.0					(168.4)
Cost of sales
Restructuring Cost and Reserve [Line Items]
Total costs to implement restructuring initiatives	90.5	(0.1)	0.5	0.6	0.7	0.0	0.0	(0.1)	91.5	0.6
SG&A expenses
Restructuring Cost and Reserve [Line Items]
Total costs to implement restructuring initiatives	$ 35.6	$ 19.9	$ 23.2	$ 10.3	$ 23.0	$ 6.2	$ 20.3	$ 10.1	$ 89.0	$ 59.6