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Regulatory Capital and Other Regulatory Matters (Tables) | 6 Months Ended
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Jun. 30, 2020
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 the U.S. Basel III capital framework.
|  | June 30, 2020 |  | December 31, 2019 |  | 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. |  | $ | 13,826 |  |  | 10.09 | % |  | $ | 13,837 |  |  | 9.54 | % |  | 4.50 | % |  | (b) |
Ally Bank |  | 16,918 |  |  | 13.21 |  |  | 16,627 |  |  | 12.30 |  |  | 4.50 |  |  | 6.50 | %
Tier 1 (to risk-weighted assets) |  |  |  |  |  |  |  |  |  |  |  |
Ally Financial Inc. |  | $ | 16,235 |  |  | 11.85 | % |  | $ | 16,271 |  |  | 11.22 | % |  | 6.00 | % |  | 6.00 | %
Ally Bank |  | 16,918 |  |  | 13.21 |  |  | 16,627 |  |  | 12.30 |  |  | 6.00 |  |  | 8.00 |
Total (to risk-weighted assets) |  |  |  |  |  |  |  |  |  |  |  |
Ally Financial Inc. |  | $ | 18,895 |  |  | 13.79 | % |  | $ | 18,506 |  |  | 12.76 | % |  | 8.00 | % |  | 10.00 | %
Ally Bank |  | 18,522 |  |  | 14.46 |  |  | 17,854 |  |  | 13.21 |  |  | 8.00 |  |  | 10.00 |
Tier 1 leverage (to adjusted quarterly average assets) (c) |  |  |  |  |  |  |  |  |  |  |  |
Ally Financial Inc. |  | $ | 16,235 |  |  | 8.93 | % |  | $ | 16,271 |  |  | 9.08 | % |  | 4.00 | % |  | (b) |
Ally Bank |  | 16,918 |  |  | 9.94 |  |  | 16,627 |  |  | 10.01 |  |  | 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 and Ally Bank were required to maintain a minimum capital conservation buffer of 2.5% at both June 30, 2020, and December 31, 2019. Beginning October 1, 2020, Ally’s preliminary stress capital buffer requirement of 3.5% will comprise its capital conservation buffer requirement. Ally’s capital conservation buffer was 5.59% and 4.76% at June 30, 2020, and December 31, 2019, respectively.
(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 Repurchase Activity | The following table presents information related to our common stock and distributions to our common stockholders over the last six quarters.
|  | 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 |
2019 |  |  |  |  |  |  |  |  |  |
First quarter |  | $ | 211 |  |  | 8,113 |  |  | 404,900 |  |  | 399,761 |  |  | $ | 0.17 |
Second quarter |  | 229 |  |  | 7,775 |  |  | 399,761 |  |  | 392,775 |  |  | 0.17 |
Third quarter |  | 300 |  |  | 9,287 |  |  | 392,775 |  |  | 383,523 |  |  | 0.17 |
Fourth quarter |  | 299 |  |  | 9,554 |  |  | 383,523 |  |  | 374,332 |  |  | 0.17 |
2020 |  |  |  |  |  |  |  |  |  |
First quarter |  | $ | 104 |  |  | 3,838 |  |  | 374,332 |  |  | 373,155 |  |  | $ | 0.19 |
Second quarter |  | — |  |  | 53 |  |  | 373,155 |  |  | 373,837 |  |  | 0.19 |
(a) | Includes shares of common stock withheld to cover income taxes owed by participants in our share-based incentive plans.
(b) | On March 17, 2020, we announced the voluntary suspension of our stock-repurchase program through its termination on June 30, 2020. We do not currently plan to implement a new stock-repurchase program or repurchase shares of our common stock, except in connection with compensation plans, for the remainder of 2020. Refer to the discussion below for further details about this action.
(c) On July 14, 2020, our Board declared a quarterly cash dividend of $0.19 per share on all common stock, payable on August 14, 2020, to stockholders of record at the close of business on July 31, 2020. Refer to Note 24 for further information regarding this common stock dividend.

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