Stock Compensation Plans (Schedule of Employee Service Share-based Compensation, Allocation of Recognized Costs) (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2020	Jun. 30, 2019	Jun. 30, 2020	Jun. 30, 2019
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]
Total stock compensation expense	$ 10.4	$ 12.7	$ 13.0	$ 25.2
Cost of goods sold
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]
Total stock compensation expense	0.3	0.5	0.4	1.0
Selling, general and administrative expenses
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]
Total stock compensation expense	$ 10.1	$ 12.2	$ 12.6	$ 24.2