DESCRIPTION OF BUSINESS AND SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (Policies)	9 Months Ended
Sep. 30, 2025
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Basis of Presentation	Basis of Presentation The accompanying interim condensed consolidated financial statements of the Company are unaudited. These interim condensed consolidated financial statements have been prepared in accordance with generally accepted accounting principles in the United States of America ("U.S. GAAP") and the applicable rules and regulations of the United States ("U.S.") Securities and Exchange Commission ("SEC") for interim financial information. Accordingly, they do not include all of the information and footnotes required by U.S. GAAP for complete financial statements. The December 31, 2024 condensed consolidated balance sheet was derived from the audited financial statements as of that date, but does not include all of the information and footnotes required by U.S. GAAP for complete financial statements. The accompanying unaudited interim condensed consolidated financial statements have been prepared on the same basis as the audited consolidated financial statements and, in the opinion of management, reflect all adjustments of a normal recurring nature considered necessary to state fairly the Company's consolidated financial position, results of operations, comprehensive income (loss), and cash flows for the interim periods. The condensed consolidated financial statements include the financial statements of Block and its wholly-owned and majority-owned subsidiaries, including variable interest entities for which the Company is deemed to be the primary beneficiary. All intercompany transactions and balances have been eliminated in consolidation. Minority interests are recorded as a noncontrolling interest, which is reported as a component of stockholders' equity on the condensed consolidated balance sheets. The interim results for the three and nine months ended September 30, 2025 are not necessarily indicative of the results that may be expected for the year ending December 31, 2025, or for any other future annual or interim period. Beginning in the second quarter of 2025, the Company began classifying the majority of its newly originated customer loan products as loans held for investment. This classification change followed a comprehensive management review of all loan products, taking into account the Company’s business strategy, prevailing economic conditions, and market trends. The information included in this Quarterly Report on Form 10-Q should be read in conjunction with the Consolidated Financial Statements and related notes in the Company's Annual Report on Form 10-K for the year ended December 31, 2024.
Use of Estimates	Use of Estimates The preparation of the Company’s condensed consolidated financial statements in conformity with U.S. GAAP requires management to make estimates and assumptions that affect the reported amounts of assets, liabilities, revenue, and expenses, as well as related disclosure of contingent assets and liabilities. Actual results could differ from the Company’s estimates. To the extent that there are material differences between these estimates and actual results, the Company’s financial condition or operating results will be materially affected. The Company bases its estimates on current and past experience, to the extent that historical experience is predictive of future performance and other assumptions that the Company believes are reasonable under the circumstances. The Company evaluates these estimates on an ongoing basis. Estimates, judgments, and assumptions in these condensed consolidated financial statements include, but are not limited to, those related to accrued transaction losses, contingencies, including outcomes from claims and disputes, valuation of loans held for sale, valuation of goodwill and acquired intangible assets, determination of goodwill and intangible asset impairment charges, determination of allowance for credit losses for loans held for investment, determination of allowance for credit losses for consumer receivables, allocation of acquired goodwill to reporting units, income and other taxes, operating and financing lease right-of-use assets and related liabilities, and share-based compensation. The Company's estimates of valuation of loans held for sale, allowance for credit losses associated with consumer receivables and loans held for investment, and accrued transaction losses are based on historical experience, adjusted for market data relevant to the current economic environment. The Company will continue to update its estimates as developments occur and additional information is obtained.
Concentration of Credit Risk	Concentration of Credit Risk For the three and nine months ended September 30, 2025 and September 30, 2024, the Company had no customer that accounted for greater than 10% of total net revenue. The Company had four third-party payment processors that represented approximately 41%, 15%, 14%, and 11% of settlements receivable as of September 30, 2025. As of December 31, 2024, the Company had three third-party processors that represented approximately 42%, 17% and 13% of settlements receivable. In both periods, all other third-party payment processors were insignificant. Certain of the Company's products are reliant on third-party service providers such as partner banks, card issuers, and payment service providers. The Company's relationships with third-party service providers may result in operational concentration risks for some of these products. Financial instruments that potentially subject the Company to concentrations of credit risk consist primarily of cash and cash equivalents, restricted cash, marketable debt securities, settlements receivable, customer funds, consumer receivables, loans held for sale, and loans held for investment. To mitigate the risk of concentration associated with cash and cash equivalents, as well as restricted cash, funds are held with creditworthy institutions and, at certain times, temporarily swept into insured programs overnight to reduce single firm concentration risk. Amounts on deposit may exceed federal deposit insurance limits. The associated risk of concentration for marketable debt securities is mitigated by holding a diversified portfolio of highly rated investments. Settlements receivable are amounts due from well-established payment processing companies and normally take one or two business days to settle, which mitigates the associated risk of concentration. The associated risk of concentration for loans and consumer receivables is partially mitigated by credit evaluations that are performed prior to facilitating the offering of loans and receivables and ongoing performance monitoring of the Company’s loan customers.
Sales and Marketing Expenses	Sales and Marketing Expenses Advertising costs are expensed as incurred and included in sales and marketing expenses on the condensed consolidated statements of operations. Total advertising costs were $137.4 million and $347.0 million for the three and nine months ended September 30, 2025, respectively, compared to $81.9 million and $221.8 million for the three and nine months ended September 30, 2024, respectively. The Company also records services, incentives, and other costs to acquire customers that are not directly related to a revenue generating transaction as sales and marketing expenses, as the Company considers these to be marketing costs to encourage the usage of Cash App. These expenses include, but are not limited to, Cash App peer-to-peer processing costs and related transaction losses, card issuance costs, customer referral bonuses, and promotional giveaways. These costs are expensed as incurred.
Recent Accounting Pronouncements and Recently Issued Accounting Pronouncements Not Yet Adopted	Recent Accounting Pronouncements In December 2023, the FASB issued Accounting Standards Update ("ASU") No. 2023-09, Improvements to Income Tax Disclosures (“ASU 2023-09”). The amendments expand income tax disclosure requirements by requiring an entity to disclose (i) specific categories in the rate reconciliation, (ii) additional information for reconciling items that meet a quantitative threshold, and (iii) the amount of taxes paid disaggregated by jurisdiction. The Company adopted this guidance effective for the annual reporting period beginning January 1, 2025. The adoption of ASU 2023-09 will impact the Company’s annual disclosures only. Recently Issued Accounting Pronouncements Not Yet Adopted In September 2025, the FASB issued ASU No. 2025-06, Targeted Improvements to the Accounting for Internal-Use Software ("ASU 2025-06"). The amendments are intended to clarify and modernize the accounting for costs related to internal-use software. The guidance removes all references to project stages and clarifies the threshold entities apply to begin capitalizing costs. The amendments are effective for fiscal years beginning after December 15, 2027, and interim periods within those fiscal years, with early adoption permitted. The Company does not expect the adoption to have a material impact on the Company's financial statements. In July 2025, the FASB issued ASU No. 2025-05, Measurement of Credit Losses for Accounts Receivable and Contract Assets (“ASU 2025-05”). The amendments allow an entity to apply a practical expedient when estimating expected credit losses, which assumes that the current conditions as of the balance sheet date will not change for the remaining life of the accounts receivable and contract assets arising from contracts with customers. The amendments are effective for fiscal years beginning after December 15, 2025, and interim reporting periods within those fiscal years, with early adoption permitted. If the practical expedient is elected, the amendments should be applied prospectively. The Company does not expect the adoption to have a material impact on the Company's financial statements.
Fair Value of Financial Instruments	The Company measures its cash equivalents, customer funds, short-term and long-term marketable debt securities, marketable equity investments, and bitcoin investment at fair value. The Company classifies these investments within Level 1 or Level 2 of the fair value hierarchy because the Company values these investments using quoted market prices or alternative pricing sources and models utilizing market observable inputs.

DESCRIPTION OF BUSINESS AND SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (Policies)

9 Months Ended

Sep. 30, 2025

Organization, Consolidation and Presentation of Financial Statements [Abstract]

The accompanying interim condensed consolidated financial statements of the Company are unaudited. These interim condensed consolidated financial statements have been prepared in accordance with generally accepted accounting principles in the United States of America ("U.S. GAAP") and the applicable rules and regulations of the United States ("U.S.") Securities and Exchange Commission ("SEC") for interim financial information. Accordingly, they do not include all of the information and footnotes required by U.S. GAAP for complete financial statements. The December 31, 2024 condensed consolidated balance sheet was derived from the audited financial statements as of that date, but does not include all of the information and footnotes required by U.S. GAAP for complete financial statements.

The accompanying unaudited interim condensed consolidated financial statements have been prepared on the same basis as the audited consolidated financial statements and, in the opinion of management, reflect all adjustments of a normal recurring nature considered necessary to state fairly the Company's consolidated financial position, results of operations, comprehensive income (loss), and cash flows for the interim periods. The condensed consolidated financial statements include the financial statements of Block and its wholly-owned and majority-owned subsidiaries, including variable interest entities for which the Company is deemed to be the primary beneficiary. All intercompany transactions and balances have been eliminated in consolidation. Minority interests are recorded as a noncontrolling interest, which is reported as a component of stockholders' equity on the condensed consolidated balance sheets. The interim results for the three and nine months ended September 30, 2025 are not necessarily indicative of the results that may be expected for the year ending December 31, 2025, or for any other future annual or interim period.

Beginning in the second quarter of 2025, the Company began classifying the majority of its newly originated customer loan products as loans held for investment. This classification change followed a comprehensive management review of all loan products, taking into account the Company’s business strategy, prevailing economic conditions, and market trends.

The information included in this Quarterly Report on Form 10-Q should be read in conjunction with the Consolidated Financial Statements and related notes in the Company's Annual Report on Form 10-K for the year ended December 31, 2024.

Use of Estimates

The preparation of the Company’s condensed consolidated financial statements in conformity with U.S. GAAP requires management to make estimates and assumptions that affect the reported amounts of assets, liabilities, revenue, and expenses, as well as related disclosure of contingent assets and liabilities. Actual results could differ from the Company’s estimates. To the extent that there are material differences between these estimates and actual results, the Company’s financial condition or operating results will be materially affected. The Company bases its estimates on current and past experience, to the extent that historical experience is predictive of future performance and other assumptions that the Company believes are reasonable under the circumstances. The Company evaluates these estimates on an ongoing basis.

Estimates, judgments, and assumptions in these condensed consolidated financial statements include, but are not limited to, those related to accrued transaction losses, contingencies, including outcomes from claims and disputes, valuation of loans held for sale, valuation of goodwill and acquired intangible assets, determination of goodwill and intangible asset impairment charges, determination of allowance for credit losses for loans held for investment, determination of allowance for credit losses for consumer receivables, allocation of acquired goodwill to reporting units, income and other taxes, operating and financing lease right-of-use assets and related liabilities, and share-based compensation.

The Company's estimates of valuation of loans held for sale, allowance for credit losses associated with consumer receivables and loans held for investment, and accrued transaction losses are based on historical experience, adjusted for market data relevant to the current economic environment. The Company will continue to update its estimates as developments occur and additional information is obtained.

Concentration of Credit Risk

For the three and nine months ended September 30, 2025 and September 30, 2024, the Company had no customer that accounted for greater than 10% of total net revenue.

The Company had four third-party payment processors that represented approximately 41%, 15%, 14%, and 11% of settlements receivable as of September 30, 2025. As of December 31, 2024, the Company had three third-party processors that represented approximately 42%, 17% and 13% of settlements receivable. In both periods, all other third-party payment processors were insignificant. Certain of the Company's products are reliant on third-party service providers such as partner banks, card issuers, and payment service providers. The Company's relationships with third-party service providers may result in operational concentration risks for some of these products.

Financial instruments that potentially subject the Company to concentrations of credit risk consist primarily of cash and cash equivalents, restricted cash, marketable debt securities, settlements receivable, customer funds, consumer receivables, loans held for sale, and loans held for investment. To mitigate the risk of concentration associated with cash and cash equivalents, as well as restricted cash, funds are held with creditworthy institutions and, at certain times, temporarily swept into insured programs overnight to reduce single firm concentration risk. Amounts on deposit may exceed federal deposit insurance limits. The associated risk of concentration for marketable debt securities is mitigated by holding a diversified portfolio of highly rated investments. Settlements receivable are amounts due from well-established payment processing companies and normally take one or two business days to settle, which mitigates the associated risk of concentration. The associated risk of concentration for loans and consumer receivables is partially mitigated by credit evaluations that are performed prior to facilitating the offering of loans and receivables and ongoing performance monitoring of the Company’s loan customers.

Sales and Marketing Expenses

Advertising costs are expensed as incurred and included in sales and marketing expenses on the condensed consolidated statements of operations. Total advertising costs were $137.4 million and $347.0 million for the three and nine months ended September 30, 2025, respectively, compared to $81.9 million and $221.8 million for the three and nine months ended September 30, 2024, respectively. The Company also records services, incentives, and other costs to acquire customers that are not directly related to a revenue generating transaction as sales and marketing expenses, as the Company considers these to be marketing costs to encourage the usage of Cash App. These expenses include, but are not limited to, Cash App peer-to-peer processing costs and related transaction losses, card issuance costs, customer referral bonuses, and promotional giveaways. These costs are expensed as incurred.

Recent Accounting Pronouncements and Recently Issued Accounting Pronouncements Not Yet Adopted

Recent Accounting Pronouncements

In December 2023, the FASB issued Accounting Standards Update ("ASU") No. 2023-09, Improvements to Income Tax Disclosures (“ASU 2023-09”). The amendments expand income tax disclosure requirements by requiring an entity to disclose (i) specific categories in the rate reconciliation, (ii) additional information for reconciling items that meet a quantitative threshold, and (iii) the amount of taxes paid disaggregated by jurisdiction. The Company adopted this guidance effective for the annual reporting period beginning January 1, 2025. The adoption of ASU 2023-09 will impact the Company’s annual disclosures only.

Recently Issued Accounting Pronouncements Not Yet Adopted

In September 2025, the FASB issued ASU No. 2025-06, Targeted Improvements to the Accounting for Internal-Use Software ("ASU 2025-06"). The amendments are intended to clarify and modernize the accounting for costs related to internal-use software. The guidance removes all references to project stages and clarifies the threshold entities apply to begin capitalizing costs. The amendments are effective for fiscal years beginning after December 15, 2027, and interim periods within those fiscal years, with early adoption permitted. The Company does not expect the adoption to have a material impact on the Company's financial statements.

In July 2025, the FASB issued ASU No. 2025-05, Measurement of Credit Losses for Accounts Receivable and Contract Assets (“ASU 2025-05”). The amendments allow an entity to apply a practical expedient when estimating expected credit losses, which assumes that the current conditions as of the balance sheet date will not change for the remaining life of the accounts receivable and contract assets arising from contracts with customers. The amendments are effective for fiscal years beginning after December 15, 2025, and interim reporting periods within those fiscal years, with early adoption permitted. If the practical expedient is elected, the amendments should be applied prospectively. The Company does not expect the adoption to have a material impact on the Company's financial statements.

Fair Value of Financial Instruments

The Company measures its cash equivalents, customer funds, short-term and long-term marketable debt securities, marketable equity investments, and bitcoin investment at fair value. The Company classifies these investments within Level 1 or Level 2 of the fair value hierarchy because the Company values these investments using quoted market prices or alternative pricing sources and models utilizing market observable inputs.