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Regulatory and Capital Adequacy (Tables)
12 Months Ended
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, 2021December 31, 2020
(Dollars in millions)Capital AmountCapital
Ratio
Minimum
Capital
Adequacy
Well-
Capitalized
Capital AmountCapital
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/A45,583 11.2 4.0 N/A
Supplementary leverage(6)(7)
48,346 9.9 3.0 N/A45,583 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/A19,924 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/A26,671 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”.