Supplementary Data Other (Expense) Income, Net (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2020	Mar. 31, 2019
Other Income and Expenses [Abstract]
Net losses on sales of businesses	$ (23.3)	$ (8.6)
Other Nonoperating Income	1.5	1.7
Total other expense, net	$ (21.8)	$ (6.9)