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Equity - Changes in Shares of Common Stock (Details) - shares	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Beginning of year	2,100,885,134	2,091,562,747	1,798,844,267
Acquisition of Concho	0	0	285,928,872
Distributed under benefit plans	2,887,382	9,322,387	6,789,608
End of year	2,103,772,516	2,100,885,134	2,091,562,747
Held in Treasury
Beginning of year	877,029,062	789,319,875	730,802,089
Repurchase of common stock	48,641,899	87,709,187	58,517,786
End of year	925,670,961	877,029,062	789,319,875

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Treasury Stock, Common

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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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A roll forward is a reconciliation of a concept from the beginning of a period to the end of a period.

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Number of shares of stock issued during the period pursuant to acquisitions.

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Number, after forfeiture, of shares or units issued under share-based payment arrangement. Excludes shares or units issued under employee stock ownership plan (ESOP).

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Number of shares that have been repurchased during the period and have not been retired and are not held in treasury. Some state laws may govern the circumstances under which an entity may acquire its own stock and prescribe the accounting treatment therefore. This element is used when state law does not recognize treasury stock.

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

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