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CONSOLIDATED BALANCE SHEETS (UNAUDITED) (Parenthetical) - $ / shares shares in Millions | Mar. 31, 2021 | Dec. 31, 2020 | Mar. 31, 2020
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Statement of Financial Position [Abstract] |  |  |
Common stock, par value (in dollars per share) | $ 0.33 | $ 0.33 | $ 0.33
Common stock, shares outstanding (in shares) | 265.9 | 268.7 | 272.4

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