REGULATORY CAPITAL (Tables)

12 Months Ended

Dec. 31, 2019

Banking and Thrift [Abstract]

Schedule of compliance with regulatory capital requirements under banking regulations

 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 ratios	Stated minimum		Citigroup								Citibank
			Well- capitalized minimum		December 31, 2019			December 31, 2018			Well- capitalized minimum		December 31, 2019			December 31, 2018
Common Equity Tier 1 Capital					$	137,798		$	139,252				$	130,791		$	129,091
Tier 1 Capital					155,805			158,122					132,918			131,215
Total Capital (Tier 1 Capital + Tier 2 Capital)—Standardized Approach					193,682			195,440					157,324			155,154
Total Capital (Tier 1 Capital + Tier 2 Capital)—Advanced Approaches					181,337			183,144					145,989			144,358
Total risk-weighted assets—Standardized Approach					1,166,523			1,174,448					1,019,916			1,032,809
Total risk-weighted assets—Advanced Approaches					1,135,553			1,131,933					932,432			926,229
Quarterly adjusted average total assets(1)					1,957,039			1,896,959					1,459,851			1,398,875
Total Leverage Exposure(2)					2,507,891			2,465,641					1,951,701			1,914,663
Common Equity Tier 1 Capital ratio(3)	4.5	%	N/A		11.81		%	11.86		%	6.5	%	12.82		%	12.50		%
Tier 1 Capital ratio(3)	6.0		6.0	%	13.36			13.46			8.0		13.03			12.70
Total Capital ratio(3)	8.0		10.0		15.97			16.18			10.0		15.43			15.02
Tier 1 Leverage ratio	4.0		N/A		7.96			8.34			5.0		9.10			9.38
Supplementary Leverage ratio	3.0		N/A		6.21			6.41			6.0		6.81			6.85

(1) Tier 1 Leverage ratio denominator.

(2) Supplementary Leverage ratio denominator.

(3) As of December 31, 2019 and 2018, Citigroup’s reportable Common Equity Tier 1 Capital and Tier 1 Capital ratios were the lower derived under the Basel III Standardized Approach, whereas the reportable Total Capital ratios were the lower derived under the Basel III Advanced Approaches framework. As of December 31, 2019 and 2018, Citibank’s reportable Common Equity Tier 1 Capital, Tier 1 Capital and Total Capital ratios were the lower derived under the Basel III Standardized Approach.

N/A  Not applicable