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Debt - Gain Loss on Early Extinguishment of Debt (Details) - USD ($) $ in Millions | 1 Months Ended | 3 Months Ended | 6 Months Ended
--- | --- | --- | ---
May 31, 2025 | Jun. 30, 2025 | Jun. 30, 2025 | Jun. 30, 2024
Extinguishment of Debt [Line Items] |  |  |  |
Principal balance outstanding prior to repurchase |  |  | $ 519 |
Unamortized debt issuance costs and discounts |  |  | (4) |
Amount paid to repurchase debt |  |  | (421) | $ 0
Gain (loss) on early extinguishment of debt, pre-tax |  | $ 94 | $ 94 | $ 0
3.05% notes, due 2030 | Senior notes |  |  |  |
Extinguishment of Debt [Line Items] |  |  |  |
Early extinguishment of debt | $ 34 |  |  |
Debt instrument, interest rate, stated percentage | 3.05% | 3.05% | 3.05% |
4.35% notes, due 2048 | Senior notes |  |  |  |
Extinguishment of Debt [Line Items] |  |  |  |
Early extinguishment of debt | $ 129 |  |  |
Debt instrument, interest rate, stated percentage | 4.35% | 4.35% | 4.35% |
4.375% notes, due 2050 | Senior notes |  |  |  |
Extinguishment of Debt [Line Items] |  |  |  |
Early extinguishment of debt | $ 136 |  |  |
Debt instrument, interest rate, stated percentage | 4.375% | 4.375% | 4.375% |
Variable rate, due 2066 | Subordinated Debt |  |  |  |
Extinguishment of Debt [Line Items] |  |  |  |
Early extinguishment of debt | $ 97 |  |  |
Variable rate, due 2067 | Subordinated Debt |  |  |  |
Extinguishment of Debt [Line Items] |  |  |  |
Early extinguishment of debt | 97 |  |  |
Variable rate, due 2066 | Capital Securities |  |  |  |
Extinguishment of Debt [Line Items] |  |  |  |
Early extinguishment of debt | 21 |  |  |
Variable rate, due 2067 | Capital Securities |  |  |  |
Extinguishment of Debt [Line Items] |  |  |  |
Early extinguishment of debt | $ 5 |  |  |

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- Definition Contractual interest rate for funds borrowed, under the debt agreement. + 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(22)(a)(1)) -Publisher FASB -URI https://asc.fasb.org/1943274/2147480566/210-10-S99-1 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Topic 470 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 1B -Subparagraph (b) -Publisher FASB -URI https://asc.fasb.org/1943274/2147481139/470-20-50-1B + Details
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