Aggregate dividends paid during the period for each share of common stock outstanding.

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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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No definition available.

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The cash inflow associated with the amount received from holders exercising their stock warrants.

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Number of treasury shares or units reissued. Excludes reissuance of shares or units in treasury for award under share-based payment arrangement.

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Number of common and preferred shares that were previously issued and that were repurchased by the issuing entity and held in treasury on the financial statement date. This stock has no voting rights and receives no dividends.

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Equity impact of the cost of common and preferred stock that were repurchased during the period. Recorded using the cost method.

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Equity - Common stock, dividends and repurchases of common stock (Details) - USD ($) $ / shares in Units, $ in Millions							1 Months Ended	3 Months Ended		9 Months Ended
	Sep. 30, 2022	Jun. 30, 2022	Mar. 31, 2022	Sep. 30, 2021	Jun. 29, 2021	Mar. 30, 2021	Oct. 27, 2022	Sep. 30, 2022	Sep. 30, 2021	Sep. 30, 2022	Sep. 30, 2021
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Shares, beginning of year (in shares)							1,906,671,492			1,906,671,492
Shares, beginning of year (in shares)							(1,159,455,582)			(1,087,984,129)
Shares, beginning of year							747,215,910			818,687,363
Shares issued (in shares)										5,209,573
Shares repurchased (in shares)										(76,681,026)	(32,000,000)
Shares, end of period (in shares)	1,906,671,492							1,906,671,492		1,906,671,492
Shares, end of period (in shares)	(1,159,455,582)							(1,159,455,582)		(1,159,455,582)
Shares, end of period	747,215,910							747,215,910		747,215,910
Dividend paid (in dollars per share)	$ 0.32	$ 0.32	$ 0.32	$ 0.32	$ 0.32	$ 0.32
Aggregate repurchases of common stock								$ 1,268	$ 1,059	$ 4,370	$ 1,651
Total number of common shares repurchased (in shares)										76,681,026	32,000,000
Subsequent event
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Shares repurchased (in shares)							(4,000,000)
Aggregate repurchases of common stock							$ 221
Total number of common shares repurchased (in shares)							4,000,000
Exchange Act 10b5-1 Plan
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Proceeds from warrant exercises											$ 92
Common Stock
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Shares, beginning of year (in shares)							1,906,671,492			1,906,671,492
Shares, end of period (in shares)	1,906,671,492							1,906,671,492		1,906,671,492
Treasury Stock
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Shares, beginning of year (in shares)							(1,159,455,582)			(1,087,984,129)
Shares issued (in shares)										5,209,573
Shares repurchased (in shares)										(76,681,026)
Shares, end of period (in shares)	(1,159,455,582)							(1,159,455,582)		(1,159,455,582)
Total number of common shares repurchased (in shares)										76,681,026