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Condensed Consolidated Balance Sheets (Unaudited) (Parenthetical) - USD ($) $ in Millions | Mar. 31, 2022 | Dec. 31, 2021
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Statement of Financial Position [Abstract] |  |
Receivables allowance | $ 6.2 | $ 5.3
Preferred stock, par value (in dollars per share) | $ 1 | $ 1
Preferred stock, authorized shares (in shares) | 5,000,000 | 5,000,000
Preferred stock, unissued shares (in shares) | 5,000,000 | 5,000,000
Common stock, par value (in dollars per share) | $ 1 | $ 1
Common stock, authorized shares (in shares) | 200,000,000 | 200,000,000
Common stock, shares outstanding (in shares) | 51,600,000 | 52,000,000
Treasury, shares (in shares) | 26,800,000 | 26,400,000

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