Consolidated Balance Sheets (Parenthetical) - USD ($) shares in Millions, $ in Millions	Dec. 31, 2021	Dec. 31, 2020
Statement of Financial Position [Abstract]
Allowance for doubtful accounts	$ 68.5	$ 98.3
Accumulated Depreciation, Depletion and Amortization, Property, Plant, and Equipment	$ 1,201.6	$ 1,133.9
Common stock, par value	$ 0.10	$ 0.10
Common stock, shares authorized	800.0	800.0
Common stock, shares issued	394.3	390.9
Common stock, shares outstanding	394.3	390.9
Treasury stock, shares	0.0	0.0