Other Assets (Details) - USD ($) $ in Millions	Dec. 31, 2019	Dec. 31, 2018
Business incentive plan assets [Line Items]
Upfront Incentive Payments	$ 79.0	$ 56.0
Available for sale securities	1.6	1.7
Deferred income taxes—non-current	162.3	184.8
Business Incentive Plan Assets	191.2	190.8
Operating lease assets, net	95.6	0.0
Other assets	138.1	111.8
Total	588.8	489.1
Other Assets [Member]
Business incentive plan assets [Line Items]
Upfront Incentive Payments	$ 71.0	$ 49.8