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Consolidated Balance Sheets (Parenthetical) - USD ($)
$ in Millions
Dec. 31, 2021
Dec. 31, 2020
Statement of Financial Position [Abstract]    
Accounts receivable, allowance for credit loss, current $ 20.2 $ 17.7
Preferred stock, shares authorized (in shares) 2,500,000 2,500,000
Preferred stock, par value (usd per share) $ 0.001 $ 0.001
Preferred stock, shares issued (in shares) 0 0
Preferred stock, shares outstanding (in shares) 0 0
Common stock, shares authorized (in shares) 600,000,000.0 600,000,000.0
Common stock, par value (usd per share) $ 0.001 $ 0.001
Common stock, shares issued (in shares) 357,700,000 353,100,000
Common stock, shares outstanding (in shares) 357,700,000 353,100,000