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Regulatory Matters and Capital Adequacy (Tables) | 12 Months Ended
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Dec. 31, 2023
Regulatory Matters And Capital Adequacy [Abstract] |
Regulatory capital ratios | The following table presents the regulatory capital ratios:
(Millions, except percentages) |  | CET 1 capital |  | Tier 1 capital |  | Total capital |  | CET 1 capital ratio |  | Tier 1 capital ratio |  | Total capital ratio |  | Tier 1 leverage ratio |  |
December 31, 2023: (a) |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
American Express Company |  | $ | 23,174 |  |  | $ | 24,779 |  |  | $ | 28,784 |  |  | 10.5 | % |  | 11.3 | % |  | 13.1 | % |  | 9.9 | % |  |
American Express National Bank |  | $ | 17,038 |  |  | $ | 17,038 |  |  | $ | 19,548 |  |  | 11.6 | % |  | 11.6 | % |  | 13.3 | % |  | 9.5 | % |  |
December 31, 2022: (a) |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
American Express Company |  | $ | 20,030 |  |  | $ | 21,627 |  |  | $ | 24,926 |  |  | 10.3 | % |  | 11.1 | % |  | 12.8 | % |  | 9.9 | % |  |
American Express National Bank |  | $ | 14,820 |  |  | $ | 14,820 |  |  | $ | 17,273 |  |  | 11.3 | % |  | 11.3 | % |  | 13.2 | % |  | 9.7 | % |  |
Well-capitalized ratios (b) |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
American Express Company |  |  |  |  |  |  |  | N/A |  | 6.0 | % |  | 10.0 | % |  | N/A |  |
American Express National Bank |  |  |  |  |  |  |  | 6.5 | % |  | 8.0 | % |  | 10.0 | % |  | 5.0 | % |  |
Minimum capital ratios (c) |  |  |  |  |  |  |  | 4.5 | % |  | 6.0 | % |  | 8.0 | % |  | 4.0 | % |  |
Effective Minimum (d) |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
American Express Company |  |  |  |  |  |  |  | 7.0 | % |  | 8.5 | % |  | 10.5 | % |  | 4.0 | % |  |
American Express National Bank |  |  |  |  |  |  |  | 7.0 | % |  | 8.5 | % |  | 10.5 | % |  | 4.0 | % |  |
(a)Capital ratios reported using Basel III capital definitions and risk-weighted assets using the Basel III standardized approach. (b)Represents requirements for bank holding companies and banking subsidiaries to be considered “well capitalized” pursuant to regulations issued under the Federal Reserve Regulation Y and the Federal Deposit Insurance Corporation Improvement Act, respectively. There is no CET1 capital ratio or Tier 1 leverage ratio requirement for a bank holding company to be considered “well capitalized.” (c)As defined by the regulations issued by the Federal Reserve and OCC. (d)Represents Basel III minimum capital requirement and applicable regulatory buffers as defined by the federal banking regulators, which includes the stress capital buffer for American Express Company and the capital conservation buffer for American Express National Bank.

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- Definition Regulatory matters and capital adequacy. + References No definition available. + Details
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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//1943274/2147480696/942-505-50-1 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//1943274/2147480696/942-505-50-1B + Details
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