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Income Taxes (Details Textual) - USD ($) $ in Millions | 1 Months Ended | 3 Months Ended | 9 Months Ended
--- | --- | --- | ---
Dec. 31, 2024 | Sep. 30, 2025 | Sep. 30, 2024 | Sep. 30, 2025 | Sep. 30, 2024
Income Tax Contingency [Line Items] |  |  |  |  |
Effective tax rates |  | 24.10% | 21.80% | 21.80% | 21.50%
Unrecognized tax benefits change as a result of potential resolutions of prior years' tax |  | $ 129 |  | $ 129 |
Unrecognized tax benefits that, if recognized, could impact effective tax rate |  | 102 |  | 102 |
Tax credit investments |  | $ 1,719 | $ 1,558 | $ 1,719 | $ 1,558
Internal Revenue Service (IRS) |  |  |  |  |
Income Tax Contingency [Line Items] |  |  |  |  |
Additional estimated federal income tax payment | $ 185 |  |  |  |
Internal Revenue Service (IRS) | Penalties |  |  |  |  |
Income Tax Contingency [Line Items] |  |  |  |  |
Additional estimated federal income tax payment | $ 50 |  |  |  |

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- Definition Amount of investment that generates income tax credit and other income tax benefit under tax credit program elected to be accounted for using proportional amortization method. Includes, but is not limited to, investment under program not meeting condition for accounting under proportional amortization method. + References Reference 1: http://fasb.org/us-gaap/role/ref/otherTransitionRef -Topic 740 -SubTopic 323 -Name Accounting Standards Codification -Section 50 -Paragraph 2 -Subparagraph (b) -Publisher FASB -URI https://asc.fasb.org/1943274/2147478156/740-323-50-2 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Topic 740 -SubTopic 323 -Name Accounting Standards Codification -Section 50 -Paragraph 1A -Subparagraph (b) -Publisher FASB -URI https://asc.fasb.org/1943274/2147478156/740-323-50-1A + Details
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- Definition Percentage of current income tax expense (benefit) and deferred income tax expense (benefit) pertaining to continuing operations. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 740 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 12 -Publisher FASB -URI https://asc.fasb.org/1943274/2147482685/740-10-50-12 Reference 2: http://www.xbrl.org/2003/role/exampleRef -Topic 740 -SubTopic 10 -Name Accounting Standards Codification -Section 55 -Paragraph 231 -Publisher FASB -URI https://asc.fasb.org/1943274/2147482663/740-10-55-231 + Details
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