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Equity - Shareholders' Equity (Details) - shares | 12 Months Ended
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Dec. 31, 2023 | Dec. 31, 2022 | Dec. 31, 2021
Movement in Common Stock and Treasury Stock [Roll Forward] |  |  |
Balance January 1, common stock (in shares) | 3,577,103,522 |  |
Balance January 1, treasury stock (in shares) | 1,039,269,638 |  |
Balance December 31, common stock (in shares) | 3,577,103,522 | 3,577,103,522 |
Balance December 31, treasury stock (in shares) | 1,045,470,249 | 1,039,269,638 |
Common Stock |  |  |
Movement in Common Stock and Treasury Stock [Roll Forward] |  |  |
Balance January 1, common stock (in shares) | 3,577,000,000 | 3,577,000,000 | 3,577,000,000
Purchases of treasury stock (in shares) | 0 | 0 | 0
Issuances (in shares) | 0 | 0 | 0
Balance December 31, common stock (in shares) | 3,577,000,000 | 3,577,000,000 | 3,577,000,000
Treasury Stock |  |  |
Movement in Common Stock and Treasury Stock [Roll Forward] |  |  |
Balance January 1, treasury stock (in shares) | 1,039,000,000 | 1,049,000,000 | 1,047,000,000
Purchases of treasury stock (in shares) | 13,000,000 | 0 | 11,000,000
Issuances (in shares) | (7,000,000) | (10,000,000) | (9,000,000)
Balance December 31, treasury stock (in shares) | 1,045,000,000 | 1,039,000,000 | 1,049,000,000

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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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- Definition Number, after forfeiture, of shares or units issued under share-based payment arrangement. Excludes shares or units issued under employee stock ownership plan (ESOP). + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Section 50 -Paragraph 2 -SubTopic 10 -Topic 505 -Publisher FASB -URI https://asc.fasb.org//1943274/2147481112/505-10-50-2 Reference 2: 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(28)) -Publisher FASB -URI https://asc.fasb.org//1943274/2147480566/210-10-S99-1 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Topic 505 -SubTopic 10 -Name Accounting Standards Codification -Section S99 -Paragraph 1 -Subparagraph (SX 210.3-04) -Publisher FASB -URI https://asc.fasb.org//1943274/2147480008/505-10-S99-1 Reference 4: 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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- Definition Number of previously issued common shares repurchased by the issuing entity and held in treasury. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Topic 505 -SubTopic 30 -Section 45 -Paragraph 1 -Publisher FASB -URI https://asc.fasb.org//1943274/2147481549/505-30-45-1 + Details
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