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Earnings Per Share (Detail) - shares shares in Millions	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Earnings Per Share
Number of common shares outstanding at end of period	407.9	416.1	422.8
Effect of using weighted average common shares outstanding	4.9	4.3	0.2
Weighted average basic common shares outstanding	412.8	420.4	423.0
Dilutive effect of equity-based compensation awards and other contingently issuable shares	2.2	2.5	2.1
Weighted average diluted common shares outstanding	415.0	422.9	425.1
Potentially issuable shares	5.2	5.7	6.1
Number of anti-dilutive potentially issuable shares excluded from diluted common shares outstanding	1.1	0.6	1.6

X

- Definition

Securities (including those issuable pursuant to contingent stock agreements) that could potentially dilute basic earnings per share (EPS) or earnings per unit (EPU) in the future that were not included in the computation of diluted EPS or EPU because to do so would increase EPS or EPU amounts or decrease loss per share or unit amounts for the period presented.

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

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Additional shares included in the calculation of diluted EPS as a result of the potentially dilutive effect of contingently issuable shares. Contingently issuable shares are those shares that are issuable for little or no cash contingent on certain conditions being met.

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The sum of dilutive potential common shares or units used in the calculation of the diluted per-share or per-unit computation.

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The average number of shares or units issued and outstanding that are used in calculating diluted EPS or earnings per unit (EPU), determined based on the timing of issuance of shares or units in the period.

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Number of [basic] shares or units, after adjustment for contingently issuable shares or units and other shares or units not deemed outstanding, determined by relating the portion of time within a reporting period that common shares or units have been outstanding to the total time in that period.

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