BASIS OF PRESENTATION, UPDATED ACCOUNTING POLICIES AND ACCOUNTING CHANGES (Policies)	3 Months Ended
Mar. 31, 2026
Accounting Policies [Abstract]
Basis of Presentation	The accompanying unaudited Consolidated Financial Statements as of March 31, 2026 and for the three months ended March 31, 2026 and 2025 include the accounts of Citigroup Inc. and its consolidated subsidiaries. In the opinion of management, all adjustments, consisting of normal recurring adjustments, necessary for a fair presentation have been reflected. The accompanying unaudited Consolidated Financial Statements should be read in conjunction with the Consolidated Financial Statements and related notes included within Citigroup’s Annual Report on Form 10-K for the year ended December 31, 2025 (2025 Form 10-K). Certain financial information that is usually included in annual financial statements prepared in accordance with U.S. generally accepted accounting principles (GAAP), but is not required for interim reporting purposes, has been condensed or omitted. Management must make estimates and assumptions that affect the Consolidated Financial Statements and the related footnote disclosures. While management uses its best judgment, actual results could differ from those estimates. As noted above, the Notes to these Consolidated Financial Statements are unaudited. Throughout these Notes, “Citigroup,” “Citi” and “the Company” refer to Citigroup Inc. and its consolidated subsidiaries.
Reclassifications	Certain reclassifications and updates have been made to the prior periods’ financial statements and notes to conform to the current period’s presentation.
Cash Equivalents	Cash equivalents are defined as those amounts included in Cash and due from banks and predominately all of Deposits with banks. Cash flows from risk management activities are classified in the same category as the related assets and liabilities. Amounts included in Cash and due from banks and Deposits with banks approximate fair value. The Company has receivables and payables for financial instruments sold to and purchased from brokers, dealers and customers, which arise in the ordinary course of business. These amounts include Brokerage receivables and Brokerage payables on the Consolidated Balance Sheet that are recorded by Citi’s broker-dealer entities and accounted for in accordance with the AICPA Accounting Guide for Brokers and Dealers in Securities as codified in ASC 940-320.
Accounting Changes and Future Accounting Changes	ACCOUNTING CHANGES See Note 1 to the Consolidated Financial Statements in Citi’s 2025 Form 10-K for a discussion of 2025 accounting changes. FUTURE ACCOUNTING CHANGES Initial Measurement of Paid-in-Kind Dividends on Equity-Classified Preferred Stock In April 2026, the Financial Accounting Standards Board (FASB) issued Accounting Standards Update (ASU) No. 2026-01, Equity (Topic 505): Initial Measurement of Paid-in-Kind Dividends on Equity-Classified Preferred Stock, to provide authoritative guidance on how an issuer should initially measure paid-in-kind (PIK) dividends on equity-classified preferred stock. The amendments do not affect the recognition timing of PIK dividends but clarify that PIK dividends within scope are to be initially measured on the basis of the PIK dividend rate stated in the preferred stock agreement. The ASU will be effective for all entities for interim and annual periods beginning after December 15, 2026, with early adoption permitted. Adoption may be applied either on a prospective basis or on a modified retrospective basis for equity-classified preferred stock instruments outstanding as of the initial application date. Adoption of the ASU is not expected to have a material impact on Citi’s operating results or financial position. Hedge Accounting Improvements In November 2025, the FASB issued ASU No. 2025-09, Derivatives and Hedging (Topic 815): Hedge Accounting Improvements, to clarify certain aspects of the guidance on hedge accounting and to address several incremental hedge accounting issues arising from the global reference rate reform initiative. The objective of the ASU is to more closely align hedge accounting with the economics of an entity’s risk management activities. The amendments, which are adopted prospectively, are effective for annual reporting periods beginning after December 15, 2026, and interim periods within those annual reporting periods, with early adoption permitted. Adoption of the ASU is not expected to have a material impact on Citi’s operating results or financial position. Purchased Loans In November 2025, the FASB issued ASU No. 2025-08, Financial Instruments—Credit Losses (Topic 326): Purchased Loans, which amends Topic 326 to expand the application of the gross-up method of recording the expected credit losses at the purchase date to “purchased seasoned loans” that do not have more-than-insignificant credit losses at acquisition. All non-purchased credit deteriorated (PCD) loans (excluding credit cards) that are acquired in a business combination are deemed seasoned while other non-PCD loans (excluding credit cards) are seasoned if they were purchased at least 90 days after origination and the acquirer was not involved in the origination of the loans. As a result of this ASU, originated loans and purchased non-seasoned loans without credit deterioration will recognize expected credit losses at origination or when purchased, while purchased loans with credit deterioration will reflect a gross-up associated with credit at acquisition. The amendments in this ASU are effective for all entities for annual reporting periods beginning after December 15, 2026, and interim reporting periods within those annual reporting periods, with early adoption permitted. The amendments in this ASU should be applied prospectively to loans that are acquired on or after the initial application date. Citi is currently evaluating the impact of this ASU on its financial statements. Derivatives Scope Refinements and Scope Clarification for Share-Based Non-Cash Consideration from a Customer in a Revenue Contract In September 2025, the FASB issued ASU No. 2025-07, Derivatives and Hedging (Topic 815) and Revenue from Contracts with Customers (Topic 606). The amendments in the ASU exclude from derivative accounting certain non-exchange-traded contracts with underlyings that are based on operations or activities specific to one of the parties to the contract. The amendments also clarify that an entity should apply the guidance in Topic 606, including the guidance on non-cash consideration, to a contract with share-based non-cash consideration from a customer for the transfer of goods or services. The transition method is prospective with the modified retrospective method permitted. The amendments will be effective for fiscal years beginning after December 15, 2026, with early adoption permitted. Citi is currently evaluating the impact of the amendments. Accounting for Internal-Use Software Costs In September 2025, the FASB issued ASU No. 2025-06, Intangibles—Goodwill and Other—Internal-Use Software (Subtopic 350-40): Targeted Improvements to the Accounting for Internal-Use Software, intended to modernize the internal-use software guidance, primarily by eliminating accounting consideration of software project development stages and enhancing the guidance around the “probable-to-complete” threshold in determining when capitalization of internal-use software costs begins. The ASU will be effective for all entities for interim and annual periods beginning after December 15, 2027, with early adoption permitted. Citi is currently assessing the impact and approach toward adopting this ASU. Disaggregation of Income Statement Expenses In November 2024, the FASB issued ASU No. 2024-03, Income Statement—Reporting Comprehensive Income—Expense Disaggregation Disclosures (Subtopic 220-40), to improve the disclosures of expenses by requiring public business entities to provide further disaggregation of relevant expense captions (i.e., employee compensation, depreciation, intangible asset amortization) in a separate note to the financial statements, a qualitative description of the amounts remaining in relevant expense captions that are not separately disaggregated quantitatively, and the total amount of selling expenses and, in an annual reporting period, an entity’s definition of selling expenses. The transition method is prospective with the retrospective method permitted, and the ASU will be effective for Citi for its annual period ending December 31, 2027 and interim periods for the interim period beginning January 1, 2028. Citi is currently evaluating the impact on its disclosures.

BASIS OF PRESENTATION, UPDATED ACCOUNTING POLICIES AND ACCOUNTING CHANGES (Policies)

The accompanying unaudited Consolidated Financial Statements as of March 31, 2026 and for the three months ended March 31, 2026 and 2025 include the accounts of Citigroup Inc. and its consolidated subsidiaries.

In the opinion of management, all adjustments, consisting of normal recurring adjustments, necessary for a fair presentation have been reflected. The accompanying unaudited Consolidated Financial Statements should be read in conjunction with the Consolidated Financial Statements and related notes included within Citigroup’s Annual Report on Form 10-K for the year ended December 31, 2025 (2025 Form 10-K).

Certain financial information that is usually included in annual financial statements prepared in accordance with U.S. generally accepted accounting principles (GAAP), but is not required for interim reporting purposes, has been condensed or omitted.

Management must make estimates and assumptions that affect the Consolidated Financial Statements and the related footnote disclosures. While management uses its best judgment, actual results could differ from those estimates.

As noted above, the Notes to these Consolidated Financial Statements are unaudited.

Throughout these Notes, “Citigroup,” “Citi” and “the Company” refer to Citigroup Inc. and its consolidated subsidiaries.

Certain reclassifications and updates have been made to the prior periods’ financial statements and notes to conform to the current period’s presentation.

Cash equivalents are defined as those amounts included in Cash and due from banks and predominately all of Deposits with banks. Cash flows from risk management activities are classified in the same category as the related assets and liabilities. Amounts included in Cash and due from banks and Deposits with banks approximate fair value.

The Company has receivables and payables for financial instruments sold to and purchased from brokers, dealers and customers, which arise in the ordinary course of business. These amounts include Brokerage receivables and Brokerage payables on the Consolidated Balance Sheet that are recorded by Citi’s broker-dealer entities and accounted for in accordance with the AICPA Accounting Guide for Brokers and Dealers in Securities as codified in ASC 940-320.

See Note 1 to the Consolidated Financial Statements in Citi’s 2025 Form 10-K for a discussion of 2025 accounting changes.

FUTURE ACCOUNTING CHANGES

Initial Measurement of Paid-in-Kind Dividends on Equity-Classified Preferred Stock

In April 2026, the Financial Accounting Standards Board (FASB) issued Accounting Standards Update (ASU) No. 2026-01, Equity (Topic 505): Initial Measurement of Paid-in-Kind Dividends on Equity-Classified Preferred Stock, to provide authoritative guidance on how an issuer should initially measure paid-in-kind (PIK) dividends on equity-classified preferred stock. The amendments do not affect the recognition timing of PIK dividends but clarify that PIK dividends within scope are to be initially measured on the basis of the PIK dividend rate stated in the preferred stock agreement. The ASU will be effective for all entities for interim and annual periods beginning after December 15, 2026, with early adoption permitted. Adoption may be applied either on a prospective basis or on a modified retrospective basis for equity-classified preferred stock instruments outstanding as of the initial application date. Adoption of the ASU is not expected to have a material impact on Citi’s operating results or financial position.

Hedge Accounting Improvements

In November 2025, the FASB issued ASU No. 2025-09, Derivatives and Hedging (Topic 815): Hedge Accounting Improvements, to clarify certain aspects of the guidance on hedge accounting and to address several incremental hedge accounting issues arising from the global reference rate reform initiative. The objective of the ASU is to more closely align hedge accounting with the economics of an entity’s risk management activities. The amendments, which are adopted prospectively, are effective for annual reporting periods beginning after December 15, 2026, and interim periods within those annual reporting periods, with early adoption permitted. Adoption of the ASU is not expected to have a material impact on Citi’s operating results or financial position.

Purchased Loans

In November 2025, the FASB issued ASU No. 2025-08, Financial Instruments—Credit Losses (Topic 326): Purchased Loans, which amends Topic 326 to expand the application of the gross-up method of recording the expected credit losses at the purchase date to “purchased seasoned loans” that do not have more-than-insignificant credit losses at acquisition.

All non-purchased credit deteriorated (PCD) loans (excluding credit cards) that are acquired in a business combination are deemed seasoned while other non-PCD loans (excluding credit cards) are seasoned if they were purchased at least 90 days after origination and the acquirer was not involved in the origination of the loans. As a result of this ASU, originated loans and purchased non-seasoned loans without credit deterioration will recognize expected credit losses at origination or when purchased, while purchased loans with credit deterioration will reflect a gross-up associated with credit at acquisition.

The amendments in this ASU are effective for all entities for annual reporting periods beginning after December 15, 2026, and interim reporting periods within those annual reporting periods, with early adoption permitted. The amendments in this ASU should be applied prospectively to loans that are acquired on or after the initial application date. Citi is currently evaluating the impact of this ASU on its financial statements.

Derivatives Scope Refinements and Scope Clarification for Share-Based Non-Cash Consideration from a Customer in a Revenue Contract

In September 2025, the FASB issued ASU No. 2025-07, Derivatives and Hedging (Topic 815) and Revenue from Contracts with Customers (Topic 606). The amendments in the ASU exclude from derivative accounting certain non-exchange-traded contracts with underlyings that are based on operations or activities specific to one of the parties to the contract. The amendments also clarify that an entity should apply the guidance in Topic 606, including the guidance on non-cash consideration, to a contract with share-based non-cash consideration from a customer for the transfer of goods or services. The transition method is prospective with the modified retrospective method permitted. The amendments will be effective for fiscal years beginning after December 15, 2026, with early adoption permitted. Citi is currently evaluating the impact of the amendments.

Accounting for Internal-Use Software Costs

In September 2025, the FASB issued ASU No. 2025-06, Intangibles—Goodwill and Other—Internal-Use Software (Subtopic 350-40): Targeted Improvements to the Accounting for Internal-Use Software, intended to modernize the internal-use software guidance, primarily by eliminating accounting consideration of software project development stages and enhancing the guidance around the “probable-to-complete” threshold in determining when capitalization of internal-use software costs begins. The ASU will be effective for all entities for interim and annual periods beginning after December 15, 2027, with early adoption permitted. Citi is currently assessing the impact and approach toward adopting this ASU.

Disaggregation of Income Statement Expenses

In November 2024, the FASB issued ASU No. 2024-03, Income Statement—Reporting Comprehensive Income—Expense Disaggregation Disclosures (Subtopic 220-40), to improve the disclosures of expenses by requiring public business entities to provide further disaggregation of relevant expense captions (i.e., employee compensation, depreciation, intangible asset amortization) in a separate note to the financial statements, a qualitative description of the amounts remaining in relevant expense captions that are not separately disaggregated quantitatively, and the total amount of selling expenses and, in an annual reporting period, an entity’s definition of selling expenses.

The transition method is prospective with the retrospective method permitted, and the ASU will be effective for Citi for its annual period ending December 31, 2027 and interim periods for the interim period beginning January 1, 2028. Citi is currently evaluating the impact on its disclosures.