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CONSOLIDATED BALANCE SHEETS (Parenthetical) - USD ($)
$ in Millions
Dec. 31, 2021
Dec. 31, 2020
Statement of Financial Position [Abstract]    
Accounts receivable, allowances $ 10.7 $ 15.9
Common stock, par value (USD per share) $ 1.00 $ 1.00
Shares authorized (in shares) 1,000,000,000 1,000,000,000
Shares issued (in shares) 441,400,000 441,400,000
Treasury stock (in shares) 90,700,000 93,200,000