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Regulatory Capital and Other Regulatory Matters (Tables) | 9 Months Ended
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Sep. 30, 2025
Broker-Dealer, Net Capital Requirement, SEC Regulation [Abstract] |
Schedule of Compliance with Regulatory Capital Requirements under Banking Regulations | The following table summarizes our capital ratios under U.S. Basel III.
|  | September 30, 2025 |  | December 31, 2024 |  | Required minimum (a) |  | Well-capitalized minimum
($ in millions) |  | Amount |  | Ratio |  | Amount |  | Ratio |
Capital ratios |  |  |  |  |  |  |  |  |  |  |  |
Common Equity Tier 1 (to risk-weighted assets) |  |  |  |  |  |  |  |  |  |  |  |
Ally Financial Inc. |  | $ | 15,184 |  |  | 10.07 | % |  | $ | 15,058 |  |  | 9.82 | % |  | 4.50 | % |  | (b)
Ally Bank |  | 17,773 |  |  | 12.62 |  |  | 17,229 |  |  | 11.94 |  |  | 4.50 |  |  | 6.50 | %
Tier 1 (to risk-weighted assets) |  |  |  |  |  |  |  |  |  |  |  |
Ally Financial Inc. |  | $ | 17,440 |  |  | 11.57 | % |  | $ | 17,324 |  |  | 11.30 | % |  | 6.00 | % |  | 6.00 | %
Ally Bank |  | 17,773 |  |  | 12.62 |  |  | 17,229 |  |  | 11.94 |  |  | 6.00 |  |  | 8.00 |
Total (to risk-weighted assets) |  |  |  |  |  |  |  |  |  |  |  |
Ally Financial Inc. |  | $ | 20,259 |  |  | 13.44 | % |  | $ | 20,182 |  |  | 13.16 | % |  | 8.00 | % |  | 10.00 | %
Ally Bank |  | 19,555 |  |  | 13.88 |  |  | 19,052 |  |  | 13.21 |  |  | 8.00 |  |  | 10.00 |
Tier 1 leverage (to adjusted quarterly average assets) (c) |  |  |  |  |  |  |  |  |  |  |  |
Ally Financial Inc. |  | $ | 17,440 |  |  | 9.18 | % |  | $ | 17,324 |  |  | 8.92 | % |  | 4.00 | % |  | (b)
Ally Bank |  | 17,773 |  |  | 9.95 |  |  | 17,229 |  |  | 9.40 |  |  | 4.00 |  |  | 5.00 | %
(a)In addition to the minimum risk-based capital requirements for the Common Equity Tier 1 capital, Tier 1 capital, and total capital ratios, Ally was required to maintain a minimum capital conservation buffer of 2.6% at both September 30, 2025, and December 31, 2024, and Ally Bank was required to maintain a minimum capital conservation buffer of 2.5% at both September 30, 2025, and December 31, 2024. (b)Currently, there is no ratio component for determining whether a BHC is “well-capitalized.” (c)Federal regulatory reporting guidelines require the calculation of adjusted quarterly average assets using a daily average methodology.
Schedule of Common Share Distribution Activity | The following table presents information related to our common stock and distributions to our common shareholders.
|  | Common stock repurchased during period (a) (b) |  | Number of common shares outstanding |  | Cash dividends declared per common share (c)
($ in millions, except per share data; shares in thousands) |  | Approximate dollar value |  | Number of shares |  | Beginning of period |  | End of period |
2024 |  |  |  |  |  |  |  |  |  |
First quarter |  | $ | 29 |  |  | 781 |  |  | 302,459 |  |  | 303,978 |  |  | $ | 0.30 |
Second quarter |  | 1 |  |  | 13 |  |  | 303,978 |  |  | 304,656 |  |  | 0.30 |
Third quarter |  | 1 |  |  | 27 |  |  | 304,656 |  |  | 304,715 |  |  | 0.30 |
Fourth quarter |  | 7 |  |  | 167 |  |  | 304,715 |  |  | 305,388 |  |  | 0.30 |
2025 |  |  |  |  |  |  |  |  |  |
First quarter |  | $ | 34 |  |  | 877 |  |  | 305,388 |  |  | 307,152 |  |  | $ | 0.30 |
Second quarter |  | 1 |  |  | 27 |  |  | 307,152 |  |  | 307,787 |  |  | 0.30 |
Third quarter |  | 1 |  |  | 25 |  |  | 307,787 |  |  | 307,828 |  |  | 0.30 |
(a)Includes shares of common stock withheld to cover income taxes owed by participants in our share-based incentive plans. (b)Since the commencement of our initial stock-repurchase program in the third quarter of 2016, we have reduced the number of outstanding shares of our common stock by 36%, from 484 million as of June 30, 2016, to 308 million as of September 30, 2025. Except for repurchases made of shares withheld to cover income taxes owed by participants in our share-based incentive plans, we did not make any common-stock repurchases in 2024 or the first nine months of 2025, and at this time, the Board has not authorized a stock-repurchase program for 2025. (c)On October 7, 2025, our Board declared a quarterly cash dividend of $0.30 per share on all common stock payable on November 14, 2025, to shareholders of record at the close of business on October 31, 2025.

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- Definition Tabular disclosure of the capital amounts and ratios as of the balance sheet date, indicating whether the entity or entities are in compliance with regulatory capital requirements, by entity. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 942 -SubTopic 505 -Name Accounting Standards Codification -Section 50 -Paragraph 1 -Subparagraph (c)(1) -Publisher FASB -URI https://asc.fasb.org/1943274/2147477270/942-505-50-1 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Topic 942 -SubTopic 505 -Name Accounting Standards Codification -Section 50 -Paragraph 1B -Publisher FASB -URI https://asc.fasb.org/1943274/2147477270/942-505-50-1B + Details
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