Quarterly report pursuant to Section 13 or 15(d)

TRADING AND AVAILABLE FOR SALE SECURITIES AT FAIR VALUE - Narrative (Details)

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TRADING AND AVAILABLE FOR SALE SECURITIES AT FAIR VALUE - Narrative (Details)
3 Months Ended 6 Months Ended 9 Months Ended
Jun. 30, 2023
USD ($)
issuer
Sep. 30, 2022
USD ($)
Dec. 31, 2022
Mar. 31, 2023
USD ($)
issuer
Defined Benefit Plan Disclosure [Line Items]        
Number of issuers | issuer 2     2
Other-than-temporary impairment in accumulated other comprehensive loss $ 0 $ 0    
Kazakhstan Sustainability Fund JSC        
Defined Benefit Plan Disclosure [Line Items]        
Percentage of trading securities 10.00%   10.00%  
Debt securities $ 770,185,000     $ 834,917,000
Ministry of Finance of the Republic of Kazakhstan        
Defined Benefit Plan Disclosure [Line Items]        
Percentage of trading securities 10.00%   10.00%  
Debt securities $ 2,005,538,000     $ 1,015,161,000