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Equity - Changes in Shares of Common Stock (Details) - shares | 12 Months Ended
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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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- Definition 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. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Topic 210 -SubTopic 10 -Name Accounting Standards Codification -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02(29)) -Publisher FASB -URI https://asc.fasb.org//1943274/2147480566/210-10-S99-1 + Details
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