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REGULATORY CAPITAL
12 Months Ended
Dec. 31, 2020
Regulatory Capital [Abstract]  
REGULATORY CAPITAL REGULATORY CAPITAL
 
Citigroup is subject to risk-based capital and leverage standards issued by the Federal Reserve Board, which constitute the U.S. Basel III rules. Citi’s U.S.-insured depository institution subsidiaries, including Citibank, are subject to similar standards issued by their respective primary bank regulatory agencies. These standards are used to evaluate
capital adequacy and include the required minimums shown in the following table. The regulatory agencies are required by law to take specific, prompt corrective actions with respect to institutions that do not meet minimum capital standards.
 The following table sets forth for Citigroup and Citibank the regulatory capital tiers, total risk-weighted assets, quarterly adjusted average total assets, Total Leverage Exposure, risk-based capital ratios and leverage ratios:
In millions of dollars, except ratiosStated
minimum
CitigroupCitibank
Well-
capitalized
minimum
December 31, 2020December 31, 2019Well-
capitalized
minimum
December 31, 2020December 31, 2019
Common Equity Tier 1 Capital  $147,274 $137,798  $142,884 $130,720 
Tier 1 Capital  167,053 155,805  144,992 132,847 
Total Capital (Tier 1 Capital + Tier 2 Capital)—Standardized Approach
204,849 193,711 169,235 157,253 
Total Capital (Tier 1 Capital + Tier 2 Capital)—Advanced Approaches
195,959 181,337 161,294 145,918 
Total risk-weighted assets—Standardized Approach1,221,576 1,168,848 1,030,081 1,022,607 
Total risk-weighted assets—Advanced Approaches1,255,284 1,142,804 1,012,129 938,735 
Quarterly adjusted average total assets(1)
 2,265,615 1,957,039 1,680,056 1,459,780 
Total Leverage Exposure(2)
2,386,881 2,513,702 2,167,969 1,958,173 
Common Equity Tier 1 Capital ratio(3)
4.5 %    N/A11.73 %11.79 %6.5 %13.87 %12.78 %
Tier 1 Capital ratio(3)
6.0 6.0 %13.31 13.33 8.0 14.08 12.99 
Total Capital ratio(3)
8.0 10.0 15.61 15.87 10.0 15.94 15.38 
Tier 1 Leverage ratio4.0 N/A7.37 7.96 5.0 8.63 9.10 
Supplementary Leverage ratio3.0 N/A7.00 6.20 6.0 6.69 6.78 

(1)Tier 1 Leverage ratio denominator.
(2)Supplementary Leverage ratio denominator.
(3)Citigroup’s reportable Common Equity Tier 1 Capital, Tier 1 Capital and Total Capital ratios as of December 31, 2020 were the lower derived under the Basel III Advanced Approaches frameworks, whereas Citigroup’s reportable Common Equity Tier 1 Capital and Tier 1 Capital ratios were the lower derived under the Basel III Standardized Approach and the reportable Total Capital ratio was the lower derived under the Basel III Advanced Approaches framework as of December 31, 2019. As of December 31, 2020 and 2019, Citibank’s reportable Common Equity Tier 1 Capital and Tier 1 Capital ratios were the lower derived under the Basel III Standardized Approach, whereas the Total Capital ratios were the lower derived under the Basel III Advanced Approaches frameworks as of December 31, 2020 and the lower derived under the Standardized Approach as of December 31, 2019.
N/A Not applicable

As indicated in the table above, Citigroup and Citibank were “well capitalized” under the current federal bank regulatory agency definitions as of December 31, 2020 and 2019.


Banking Subsidiaries—Constraints on Dividends
There are various legal limitations on the ability of Citigroup’s subsidiary depository institutions to extend credit, pay dividends or otherwise supply funds to Citigroup and its non-bank subsidiaries. The approval of the Office of the Comptroller of the Currency is required if total dividends declared in any calendar year were to exceed amounts specified by the agency’s regulations.
In determining the dividends, each subsidiary depository institution must also consider its effect on applicable risk-based capital and leverage ratio requirements, as well as policy statements of the federal bank regulatory agencies that indicate that banking organizations should generally pay dividends out of current operating earnings. Citigroup received $2.3 billion and $17.3 billion in dividends from Citibank during 2020 and 2019, respectively.