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Regulatory and Capital Adequacy (Tables) | 12 Months Ended
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Dec. 31, 2021
Mortgage Banking [Abstract] |
Schedule of Comparison of Capital Ratios | The following table provides a comparison of our regulatory capital amounts and ratios under the Basel III Standardized Approach subject to the applicable transition provisions, the regulatory minimum capital adequacy ratios and the applicable well-capitalized standard for each ratio as of December 31, 2021 and 2020. Table 11.1: Capital Ratios Under Basel III(1)
|  | December 31, 2021 |  | December 31, 2020
(Dollars in millions) |  | Capital Amount |  | Capital Ratio |  | Minimum Capital Adequacy |  | Well- Capitalized |  | Capital Amount |  | Capital Ratio |  | Minimum Capital Adequacy |  | Well- Capitalized
Capital One Financial Corp: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Common equity Tier 1 capital(2) |  | $ | 43,501 |  |  | 13.1 | % |  | 4.5 | % |  | N/A |  | $ | 40,736 |  |  | 13.7 | % |  | 4.5 | % |  | N/A
Tier 1 capital(3) |  | 48,346 |  |  | 14.5 |  |  | 6.0 |  |  | 6.0 | % |  | 45,583 |  |  | 15.3 |  |  | 6.0 |  |  | 6.0 | %
Total capital(4) |  | 56,089 |  |  | 16.9 |  |  | 8.0 |  |  | 10.0 |  |  | 52,788 |  |  | 17.7 |  |  | 8.0 |  |  | 10.0 |
Tier 1 leverage(5) |  | 48,346 |  |  | 11.6 |  |  | 4.0 |  |  | N/A |  | 45,583 |  |  | 11.2 |  |  | 4.0 |  |  | N/A
Supplementary leverage(6)(7) |  | 48,346 |  |  | 9.9 |  |  | 3.0 |  |  | N/A |  | 45,583 |  |  | 10.7 |  |  | 3.0 |  |  | N/A
COBNA: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Common equity Tier 1 capital(2) |  | 17,392 |  |  | 16.5 |  |  | 4.5 |  |  | 6.5 |  |  | 19,924 |  |  | 21.5 |  |  | 4.5 |  |  | 6.5 |
Tier 1 capital(3) |  | 17,392 |  |  | 16.5 |  |  | 6.0 |  |  | 8.0 |  |  | 19,924 |  |  | 21.5 |  |  | 6.0 |  |  | 8.0 |
Total capital(4) |  | 19,047 |  |  | 18.0 |  |  | 8.0 |  |  | 10.0 |  |  | 21,708 |  |  | 23.4 |  |  | 8.0 |  |  | 10.0 |
Tier 1 leverage(5) |  | 17,392 |  |  | 14.9 |  |  | 4.0 |  |  | 5.0 |  |  | 19,924 |  |  | 18.3 |  |  | 4.0 |  |  | 5.0 |
Supplementary leverage(6) |  | 17,392 |  |  | 12.0 |  |  | 3.0 |  |  | N/A |  | 19,924 |  |  | 14.7 |  |  | 3.0 |  |  | N/A
CONA: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Common equity Tier 1 capital(2) |  | 26,699 |  |  | 11.1 |  |  | 4.5 |  |  | 6.5 |  |  | 26,671 |  |  | 12.4 |  |  | 4.5 |  |  | 6.5 |
Tier 1 capital(3) |  | 26,699 |  |  | 11.1 |  |  | 6.0 |  |  | 8.0 |  |  | 26,671 |  |  | 12.4 |  |  | 6.0 |  |  | 8.0 |
Total capital(4) |  | 29,449 |  |  | 12.2 |  |  | 8.0 |  |  | 10.0 |  |  | 29,369 |  |  | 13.7 |  |  | 8.0 |  |  | 10.0 |
Tier 1 leverage(5) |  | 26,699 |  |  | 7.4 |  |  | 4.0 |  |  | 5.0 |  |  | 26,671 |  |  | 7.6 |  |  | 4.0 |  |  | 5.0 |
Supplementary leverage(6) |  | 26,699 |  |  | 6.6 |  |  | 3.0 |  |  | N/A |  | 26,671 |  |  | 6.9 |  |  | 3.0 |  |  | N/A
__________ (1)Capital requirements that are not applicable are denoted by “N/A”. (2)Common equity Tier 1 capital ratio is a regulatory capital measure calculated based on common equity Tier 1 capital divided by risk-weighted assets. (3)Tier 1 capital ratio is a regulatory capital measure calculated based on Tier 1 capital divided by risk-weighted assets. (4)Total capital ratio is a regulatory capital measure calculated based on total capital divided by risk-weighted assets. (5)Tier 1 leverage ratio is a regulatory capital measure calculated based on Tier 1 capital divided by adjusted average assets. (6)Supplementary leverage ratio is a regulatory capital measure calculated based on Tier 1 capital divided by total leverage exposure. (7)The Company’s supplementary leverage ratio as of December 31, 2020 reflected the temporary exclusions of U.S Treasury securities and deposits with the Federal Reserve Banks from the denominator of the supplementary leverage ratio, pursuant to an interim final rule issued by the Federal Reserve. For more information, see “Part II—Item 7. Capital Management—Capital Standards and Prompt Corrective Action”.

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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 -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 505 -Section 50 -Paragraph 1B -URI http://asc.fasb.org/extlink&oid=117337116&loc=SL5958570-112826 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 505 -Section 50 -Paragraph 1 -Subparagraph (c)(1) -URI http://asc.fasb.org/extlink&oid=117337116&loc=SL5958568-112826 + Details
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