CONDENSED CONSOLIDATED BALANCE SHEETS (Parenthetical) - USD ($) $ in Millions	Sep. 30, 2021	Dec. 31, 2020
Statement of Financial Position [Abstract]
Allowance for doubtful accounts	$ 49.9	$ 50.9
Accumulated depreciation on property, plant and equipment	$ 343.1	$ 291.1
Common stock, par value (in usd per share)	$ 0.01	$ 0.01
Common stock authorized (in shares)	1,000,000,000	1,000,000,000
Common stock issued (in shares)	423,549,003	420,123,978
Treasury stock (in shares)	16,028,078	1,496,169