Consolidated Balance Sheets (Parenthetical) - USD ($) shares in Millions, $ in Millions	Dec. 31, 2019	Dec. 31, 2018
Statement of Financial Position [Abstract]
Allowance for doubtful accounts	$ 40.2	$ 42.5
Accumulated Depreciation, Depletion and Amortization, Property, Plant, and Equipment	$ 1,116.4	$ 1,034.9
Common stock, par value	$ 0.10	$ 0.10
Common stock, shares authorized	800.0	800.0
Common stock, shares issued	387.0	383.6
Common stock, shares outstanding	387.0	383.6
Treasury stock, shares	0.0	0.0