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Equity - Shareholders' Equity (Details) - shares	12 Months Ended
	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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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, 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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