Consolidated Balance Sheets (Parenthetical) - $ / shares shares in Millions	Dec. 31, 2021	Dec. 31, 2020
Statement of Financial Position [Abstract]
Common stock, par value (in dollars per share)	$ 1.00	$ 1.00
Common stock, authorized (in shares)	1,000.0	1,000.0
Common stock, issued (in shares)	251.8	250.9
Common stock, outstanding (in shares)	251.8	250.9
Treasury shares, at cost (in shares)	24.4	16.1

Face amount or stated value per share of common stock.

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-Topic 210
-SubTopic 10
-Section S99
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The maximum number of common shares permitted to be issued by an entity's charter and bylaws.

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Total number of common shares of an entity that have been sold or granted to shareholders (includes common shares that were issued, repurchased and remain in the treasury). These shares represent capital invested by the firm's shareholders and owners, and may be all or only a portion of the number of shares authorized. Shares issued include shares outstanding and shares held in the treasury.

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Number of shares of common stock outstanding. Common stock represent the ownership interest in a corporation.

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-Topic 505
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Number of previously issued common shares repurchased by the issuing entity and held in treasury.

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