Capital Stock: (Narrative) (Details) - USD ($) |
3 Months Ended | 8 Months Ended | 12 Months Ended | 36 Months Ended | ||||
|---|---|---|---|---|---|---|---|---|
May 11, 2022 |
Jun. 11, 2021 |
Mar. 31, 2022 |
Mar. 31, 2022 |
Dec. 31, 2023 |
Dec. 31, 2022 |
Dec. 31, 2021 |
Jun. 11, 2024 |
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| Class of Stock [Line Items] | ||||||||
| Common stock, shares authorized (in shares) | 6,000,000,000 | |||||||
| Stock repurchase program, authorized amount | $ 7,000,000,000 | |||||||
| Repurchases of common stock | $ 0 | $ 209,000,000 | $ 775,000,000 | |||||
| Stock repurchase program, period | 3 years | 3 years | ||||||
| Common stock repurchased (in shares) | 2,000,000.0 | 10,500,000 | ||||||
| Common stock repurchased, at cost | $ 199,000,000 | $ 1,000,000,000 | $ 199,000,000 | $ 785,000,000 | ||||
| Shares of common stock reserved (in shares) | 30,505,637 | |||||||
| Preferred stock shares authorized (in shares) | 250,000,000 | |||||||
| Minimum | Forecast | ||||||||
| Class of Stock [Line Items] | ||||||||
| Repurchases of common stock | $ 5,000,000,000 | |||||||
| Maximum | Forecast | ||||||||
| Class of Stock [Line Items] | ||||||||
| Repurchases of common stock | $ 7,000,000,000 | |||||||
| X | ||||||||||
- Definition The number of shares reserved for issuance (not necessarily vested). No definition available.
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| X | ||||||||||
- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. Reference 1: http://www.xbrl.org/2003/role/exampleRef
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- Definition The maximum number of common shares permitted to be issued by an entity's charter and bylaws. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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- Definition The cash outflow to reacquire common stock during the period. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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- Definition The maximum number of nonredeemable preferred shares (or preferred stock redeemable solely at the option of the issuer) permitted to be issued by an entity's charter and bylaws. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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- Definition Amount of stock repurchase plan authorized. No definition available.
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- Definition Period which shares may be purchased under a stock repurchase plan authorized by an entity's Board of Directors, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days. No definition available.
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- Definition Number of shares that have been repurchased during the period and are being held in treasury. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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- Definition Equity impact of the cost of common and preferred stock that were repurchased during the period. Recorded using the cost method. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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