Basis of presentation (Policies)	9 Months Ended
Sep. 30, 2025
Accounting Policies [Abstract]
Use of Estimates	Use of Estimates In accordance with GAAP, we have made a number of estimates and assumptions relating to the reporting of assets and liabilities and the disclosure of contingent assets and liabilities to prepare these condensed consolidated financial statements. Actual results could differ materially from these estimates. The most significant estimates are related to goodwill, intangibles and other long-lived assets, pension and other retirement benefit assets and obligations, legal contingencies, allowance for doubtful accounts, deferred tax assets and purchase price allocations.
Consolidation	Consolidation The condensed consolidated financial statements include our controlled subsidiaries. Control is determined based on ownership rights or, when applicable, based on whether we are considered to be the primary beneficiary of a variable interest entity. For controlled subsidiaries that are not wholly-owned, the noncontrolling interests are included in net income and in total equity. Investments in businesses that we do not control, but for which we have the ability to exercise significant influence over operating and financial policies, are accounted for under the equity method and our proportionate share of income or loss is recorded in other operating income (expense). Investments in businesses for which we do not have the ability to exercise significant influence over operating and financial policies are accounted for at fair value, if readily determinable, with changes in fair value recognized in net income. For equity investments that do not have a readily determinable fair value, we measure these investments at cost minus impairment, if any, plus or minus changes from observable price changes. All intercompany accounts and transactions have been eliminated in consolidation.
Foreign Currency Translation	Foreign Currency Translation Our condensed consolidated financial statements are reported in U.S. dollars. Our foreign subsidiaries maintain their records primarily in the currency of the country in which they operate. The method of translating local currency financial information into U.S. dollars depends on whether the economy in which our foreign subsidiary operates has been designated as highly inflationary or not. Economies with a three-year cumulative inflation rate of more than 100% are considered highly inflationary. Assets and liabilities of foreign subsidiaries in non-highly inflationary economies are translated into U.S. dollars using rates of exchange at the balance sheet date. Translation adjustments are recorded in other comprehensive income (loss). Revenues and expenses are translated at rates of exchange in effect during the year. Transaction gains and losses are recorded in net income. Foreign subsidiaries that operate in highly inflationary countries use the U.S. dollar as their functional currency. Local currency monetary assets and liabilities are remeasured into U.S. dollars using rates of exchange as of each balance sheet date, with remeasurement adjustments and other transaction gains and losses recognized in earnings. Other than nonmonetary equity securities and available-for-sale debt securities, nonmonetary assets and liabilities do not fluctuate with changes in local currency exchange rates to the dollar. For nonmonetary equity securities traded in highly inflationary economies, the fair market values of the equity securities are remeasured at the current exchange rates to determine gain or loss to be recorded in net income. For nonmonetary available-for-sale debt securities traded in highly inflationary economies, the fair market values of these debt securities are remeasured at the current exchange rates, with changes recorded in the gains (losses) on available-for-sale securities component of accumulated other comprehensive income (loss). We reclassify amounts from accumulated other comprehensive income (loss) into earnings when these debt securities are sold. Revenues and expenses are translated at rates of exchange in effect during the year. Argentina We operate in Argentina through wholly owned subsidiaries and a smaller controlled subsidiary (together, "Brink's Argentina"). Revenues from Brink's Argentina represented approximately 3% of our consolidated revenues for the first nine months of 2025 and 4% of our consolidated revenues for the first nine months of 2024. The operating environment in Argentina continues to present business challenges, including ongoing devaluation of the Argentine peso and significant inflation. In the first nine months of 2025 and 2024, the Argentine peso declined approximately 25% (from 1,031.0 to 1,379.7 pesos to the U.S. dollar) and 14% (from 833.3 to 968.7 pesos to the U.S. dollar), respectively. For the year ended December 31, 2024, the Argentine peso declined approximately 19% (from 833.3 to 1,031.0 pesos to the U.S. dollar). Beginning July 1, 2018, we designated Argentina's economy as highly inflationary for accounting purposes. As a result, we consolidated Brink's Argentina using our accounting policy for subsidiaries operating in highly inflationary economies beginning with the third quarter of 2018. Argentine peso-denominated monetary assets and liabilities are remeasured at each balance sheet date using the currency exchange rate then in effect, with currency remeasurement gains and losses recognized in earnings. In the first nine months of 2025, we recognized a $16.2 million pretax remeasurement loss. In the first nine months of 2024, we recognized a $11.9 million pretax remeasurement loss. Argentine peso-denominated nonmonetary assets and liabilities are recorded at historical cost based on the currency exchange rate at the time the asset or liability was acquired. At September 30, 2025, Argentina's economy remained highly inflationary for accounting purposes. At September 30, 2025, we had net monetary assets denominated in Argentine pesos of $16.3 million (including cash of $12.2 million). At September 30, 2025, we had net nonmonetary assets of $177.8 million (including $102.5 million of goodwill and $43.4 million in debt securities denominated in Argentine pesos). At December 31, 2024, we had net monetary assets denominated in Argentine pesos of $115.9 million (including cash of $104.0 million) and net nonmonetary assets of $147.5 million (including $103.1 million of goodwill and $21.2 million in debt securities denominated in Argentine pesos). In April 2025, the Argentine government announced economic policy changes, including the removal of certain currency controls. The official exchange rate will be allowed to fluctuate within a moving range. Depreciation Adjustment In accordance with our highly inflationary accounting policy, property, plant and equipment owned by Brink’s Argentina are considered nonmonetary assets. These assets retain a higher historical basis when the currency is devalued and the higher historical basis results in incremental depreciation expense being recognized. In the second quarter of 2025, we identified a prior period overstatement of depreciation related to Brink’s Argentina property, plant and equipment. The accounting error was corrected resulting in a $13.6 million increase to second quarter 2025 net income and no impact to first half 2025 net cash provided by operating activities. We have concluded that the impact of this accounting error was not material to any prior period financial statements. Consistent with our treatment of the impact of Argentina highly inflationary accounting, this adjustment has been excluded from segment results and is reported as part of Other Items not Allocated to Segments.
Goodwill	Goodwill Goodwill is recognized for the excess of the purchase price over the fair value of tangible and identifiable intangible net assets of businesses acquired. We review goodwill for impairment annually, as of October 1, and whenever events or circumstances in interim periods indicate that it is more-likely-than-not that an impairment may have occurred. Impairment indicators were reviewed as of September 30, 2025 and we concluded that there were no indicators that would more-likely-than-not reduce the fair value of a reporting unit below its carrying amount. We will continue to monitor results in future periods to determine whether any indicators of impairment exist that would cause us to perform an impairment review.
New Accounting Standards	New Accounting Standards In December 2023, the FASB issued ASU 2023-09, Income Taxes (Topic 740): Improvements to Income Tax Disclosures, which expands annual disclosures in an entity’s income tax rate reconciliation table and requires annual disclosures regarding cash taxes paid both in the U.S. (federal and state) and foreign jurisdictions. The amendments in this ASU are effective for annual periods beginning after December 15, 2024, although early adoption is permitted. This new guidance will result in increased disclosures in the notes to our financial statements. In November 2024, the FASB issued ASU 2024-03, Disaggregation of Income Statement Expenses (DISE), which requires disclosures about specific types of expenses included in the expense captions presented on the face of the income statement as well as disclosures about selling expenses. This ASU will be effective for annual reporting periods beginning after December 15, 2026, and interim reporting periods beginning after December 15, 2027. We are currently evaluating the impact that the adoption of this standard will have on the notes to our consolidated financial statements.
Revenue Recognition	For performance obligations related to the services described above, we generally satisfy our obligations as each action to provide the service to the customer occurs. Because the customers simultaneously receive and consume the benefits from our services, these performance obligations are deemed to be satisfied over time. We use an output method, units of service provided, to recognize revenue because that is the best method to represent the transfer of our services to the customer at the agreed upon rate for each action. Although not as significant as our service offerings, we also sell goods to customers from time to time, such as safe devices. In those transactions, we satisfy our performance obligation at a point in time. We recognize revenue when the goods are delivered to the customer as that is the point in time that best represents when control has transferred to the customer. Our contracts with customers describe the services we can provide along with the fees for each action to provide the service. We typically send invoices to customers for all of the services we have provided within a monthly period and payments are generally due within 30 to 60 days of the invoice date. Although our customer contracts specify the fees for each action to provide service, the majority of the services stated in our contracts do not have a defined quantity over the contract term. Accordingly, the transaction price is considered variable as there is an unknown volume of services that will be rendered over the course of the contract. We recognize revenue for these services in the period in which they are provided to the customer based on the contractual rate at which we have the right to invoice the customer for each action. Some of our contracts with customers contain clauses that define the level of service that the customer will receive. The service level agreements (“SLA”) within those contracts contain specific calculations to determine whether the appropriate level of service has been met within a specific period, which is typically a month. We estimate SLA penalties and recognize the amounts as a reduction to revenue. Taxes collected from customers and remitted to governmental authorities are not included in revenues in the condensed consolidated statements of operations. Certain of our services involve the leasing of assets, such as safes, to our customers along with the regular servicing of those safe devices. Revenues related to the leasing of these assets are recognized in accordance with applicable lease guidance, but are included in the above table as the amounts are a small percentage of overall revenues. Contract Balances Contract Assets Although payment terms and conditions can vary, for the majority of our customer contracts, we invoice for all of the services provided to the customer within a monthly period. For certain customer contracts, the timing of our performance may precede our right to invoice the customer for the total transaction price. For example, Brink's affiliates in certain countries, primarily in Latin America, negotiate annual price adjustments with certain customers and, once the price increases are finalized, the pricing changes are made retroactive to services provided in earlier periods. These retroactive pricing adjustments are estimated and recognized as revenue with a corresponding contract asset in the same period in which the related services are performed. As the estimate of the ultimate transaction price changes, we recognize a cumulative catch-up adjustment for the change in estimate. In our Rest of World segment, certain Brink's affiliates provide services to specific customers and, per contract, a portion of the consideration is retained by the customers until the contract is completed. The retention amounts are reported as contract assets until we have the right to bill the customer for these amounts. Certain Brink's affiliates make upfront consideration payments in order to gain customer contracts. The upfront payment amounts are reported as contract assets and are amortized as a reduction to revenues over the duration of the contracts. Contract assets expected to be billed or amortized within one year ($7.8 million at September 30, 2025) are included in prepaid expenses and other on the condensed consolidated balance sheet. Amounts not expected to be billed or amortized within one year ($18.5 million at September 30, 2025) are reported in other assets on the condensed consolidated balance sheet. Contract Liabilities For other customer contracts, we may obtain the right to payment or receive customer payments prior to performing the related services under the contract. When the right to customer payments or receipt of payments precedes our performance, we recognize a contract liability, which is included in accrued liabilities on the condensed consolidated balance sheet. The amount of revenue recognized in the nine months ended September 30, 2025 that was included in the January 1, 2025 contract liabilities balance was $11.5 million. This revenue consists of services provided to customers who had prepaid for those services prior to the current year. Revenue recognized in the nine months ended September 30, 2025 from performance obligations satisfied in the prior year was not significant. This revenue is a result of changes in the transaction price of our contracts with customers. Contract Costs Sales commissions directly related to obtaining new contracts with customers are capitalized when incurred and are then amortized to expense ratably over the term of the contracts. At September 30, 2025, the net capitalized costs to obtain contracts was included in other assets on the condensed consolidated balance sheet. The capitalized amounts at September 30, 2025 and December 31, 2024 were $13.3 million and $12.8 million, respectively. Practical Expedients For the majority of our contracts with customers, we invoice a fixed amount for each unit of service we have provided. These contracts provide us with the right to invoice for an amount or rate that corresponds to the value we have delivered to our customers. The volume of services that will be provided to customers over the term is not known at inception of these contracts. Therefore, while the rate per unit of service is known, the transaction price itself is variable. For this reason, we recognize revenue from these contracts equal to the amount for which we have the contractual right to invoice the customers. Because we are not required to estimate variable consideration related to the transaction price in order to recognize revenue, we are also not required to estimate the variable consideration to provide certain disclosures. As a result, we have elected to use the optional exemption related to the disclosure of transaction prices, amounts allocated to remaining performance obligations and the future periods in which revenue will be recognized, sometimes referred to as backlog. We have also elected to use the practical expedient for financing components related to our contract liabilities. We do not recognize interest expense on contracts for which the period between our receipt of customer payments and our service to the customer is one year or less.

Basis of presentation (Policies)

9 Months Ended

Sep. 30, 2025

In accordance with GAAP, we have made a number of estimates and assumptions relating to the reporting of assets and liabilities and the disclosure of contingent assets and liabilities to prepare these condensed consolidated financial statements. Actual results could differ materially from these estimates. The most significant estimates are related to goodwill, intangibles and other long-lived assets, pension and other retirement benefit assets and obligations, legal contingencies, allowance for doubtful accounts, deferred tax assets and purchase price allocations.

Consolidation

The condensed consolidated financial statements include our controlled subsidiaries. Control is determined based on ownership rights or, when applicable, based on whether we are considered to be the primary beneficiary of a variable interest entity. For controlled subsidiaries that are not wholly-owned, the noncontrolling interests are included in net income and in total equity.

Investments in businesses that we do not control, but for which we have the ability to exercise significant influence over operating and financial policies, are accounted for under the equity method and our proportionate share of income or loss is recorded in other operating income (expense). Investments in businesses for which we do not have the ability to exercise significant influence over operating and financial policies are accounted for at fair value, if readily determinable, with changes in fair value recognized in net income. For equity investments that do not have a readily determinable fair value, we measure these investments at cost minus impairment, if any, plus or minus changes from observable price changes. All intercompany accounts and transactions have been eliminated in consolidation.

Foreign Currency Translation

Our condensed consolidated financial statements are reported in U.S. dollars. Our foreign subsidiaries maintain their records primarily in the currency of the country in which they operate. The method of translating local currency financial information into U.S. dollars depends on whether the economy in which our foreign subsidiary operates has been designated as highly inflationary or not. Economies with a three-year cumulative inflation rate of more than 100% are considered highly inflationary.

Assets and liabilities of foreign subsidiaries in non-highly inflationary economies are translated into U.S. dollars using rates of exchange at the balance sheet date. Translation adjustments are recorded in other comprehensive income (loss). Revenues and expenses are translated at rates of exchange in effect during the year. Transaction gains and losses are recorded in net income.

Foreign subsidiaries that operate in highly inflationary countries use the U.S. dollar as their functional currency. Local currency monetary assets and liabilities are remeasured into U.S. dollars using rates of exchange as of each balance sheet date, with remeasurement adjustments and other transaction gains and losses recognized in earnings. Other than nonmonetary equity securities and available-for-sale debt securities, nonmonetary assets and liabilities do not fluctuate with changes in local currency exchange rates to the dollar. For nonmonetary equity securities traded in highly inflationary economies, the fair market values of the equity securities are remeasured at the current exchange rates to determine gain or loss to be recorded in net income. For nonmonetary available-for-sale debt securities traded in highly inflationary economies, the fair market values of these debt securities are remeasured at the current exchange rates, with changes recorded in the gains (losses) on available-for-sale securities component of accumulated other comprehensive income (loss). We reclassify amounts from accumulated other comprehensive income (loss) into earnings when these debt securities are sold. Revenues and expenses are translated at rates of exchange in effect during the year.

Argentina

We operate in Argentina through wholly owned subsidiaries and a smaller controlled subsidiary (together, "Brink's Argentina"). Revenues from Brink's Argentina represented approximately 3% of our consolidated revenues for the first nine months of 2025 and 4% of our consolidated revenues for the first nine months of 2024.

The operating environment in Argentina continues to present business challenges, including ongoing devaluation of the Argentine peso and significant inflation. In the first nine months of 2025 and 2024, the Argentine peso declined approximately 25% (from 1,031.0 to 1,379.7 pesos to the U.S. dollar) and 14% (from 833.3 to 968.7 pesos to the U.S. dollar), respectively. For the year ended December 31, 2024, the Argentine peso declined approximately 19% (from 833.3 to 1,031.0 pesos to the U.S. dollar).

Beginning July 1, 2018, we designated Argentina's economy as highly inflationary for accounting purposes. As a result, we consolidated Brink's Argentina using our accounting policy for subsidiaries operating in highly inflationary economies beginning with the third quarter of 2018. Argentine peso-denominated monetary assets and liabilities are remeasured at each balance sheet date using the currency exchange rate then in effect, with currency remeasurement gains and losses recognized in earnings. In the first nine months of 2025, we recognized a $16.2 million pretax remeasurement loss. In the first nine months of 2024, we recognized a $11.9 million pretax remeasurement loss. Argentine peso-denominated nonmonetary assets and liabilities are recorded at historical cost based on the currency exchange rate at the time the asset or liability was acquired.

At September 30, 2025, Argentina's economy remained highly inflationary for accounting purposes. At September 30, 2025, we had net monetary assets denominated in Argentine pesos of $16.3 million (including cash of $12.2 million). At September 30, 2025, we had net nonmonetary assets of $177.8 million (including $102.5 million of goodwill and $43.4 million in debt securities denominated in Argentine pesos).

At December 31, 2024, we had net monetary assets denominated in Argentine pesos of $115.9 million (including cash of $104.0 million) and net nonmonetary assets of $147.5 million (including $103.1 million of goodwill and $21.2 million in debt securities denominated in Argentine pesos).

In April 2025, the Argentine government announced economic policy changes, including the removal of certain currency controls. The official exchange rate will be allowed to fluctuate within a moving range.

Depreciation Adjustment

In accordance with our highly inflationary accounting policy, property, plant and equipment owned by Brink’s Argentina are considered nonmonetary assets. These assets retain a higher historical basis when the currency is devalued and the higher historical basis results in incremental depreciation expense being recognized. In the second quarter of 2025, we identified a prior period overstatement of depreciation related to Brink’s Argentina property, plant and equipment. The accounting error was corrected resulting in a $13.6 million increase to second quarter 2025 net income and no impact to first half 2025 net cash provided by operating activities. We have concluded that the impact of this accounting error was not material to any prior period financial statements. Consistent with our treatment of the impact of Argentina highly inflationary accounting, this adjustment has been excluded from segment results and is reported as part of Other Items not Allocated to Segments.

Goodwill

Goodwill is recognized for the excess of the purchase price over the fair value of tangible and identifiable intangible net assets of businesses acquired. We review goodwill for impairment annually, as of October 1, and whenever events or circumstances in interim periods indicate that it is more-likely-than-not that an impairment may have occurred. Impairment indicators were reviewed as of September 30, 2025 and we concluded that there were no indicators that would more-likely-than-not reduce the fair value of a reporting unit below its carrying amount. We will continue to monitor results in future periods to determine whether any indicators of impairment exist that would cause us to perform an impairment review.

New Accounting Standards

In December 2023, the FASB issued ASU 2023-09, Income Taxes (Topic 740): Improvements to Income Tax Disclosures, which expands annual disclosures in an entity’s income tax rate reconciliation table and requires annual disclosures regarding cash taxes paid both in the U.S. (federal and state) and foreign jurisdictions. The amendments in this ASU are effective for annual periods beginning after December 15, 2024, although early adoption is permitted. This new guidance will result in increased disclosures in the notes to our financial statements.

In November 2024, the FASB issued ASU 2024-03, Disaggregation of Income Statement Expenses (DISE), which requires disclosures about specific types of expenses included in the expense captions presented on the face of the income statement as well as disclosures about selling expenses. This ASU will be effective for annual reporting periods beginning after December 15, 2026, and interim reporting periods beginning after December 15, 2027. We are currently evaluating the impact that the adoption of this standard will have on the notes to our consolidated financial statements.

Revenue Recognition

For performance obligations related to the services described above, we generally satisfy our obligations as each action to provide the service to the customer occurs. Because the customers simultaneously receive and consume the benefits from our services, these performance obligations are deemed to be satisfied over time. We use an output method, units of service provided, to recognize revenue because that is the best method to represent the transfer of our services to the customer at the agreed upon rate for each action.

Although not as significant as our service offerings, we also sell goods to customers from time to time, such as safe devices. In those transactions, we satisfy our performance obligation at a point in time. We recognize revenue when the goods are delivered to the customer as that is the point in time that best represents when control has transferred to the customer.

Our contracts with customers describe the services we can provide along with the fees for each action to provide the service. We typically send invoices to customers for all of the services we have provided within a monthly period and payments are generally due within 30 to 60 days of the invoice date.

Although our customer contracts specify the fees for each action to provide service, the majority of the services stated in our contracts do not have a defined quantity over the contract term. Accordingly, the transaction price is considered variable as there is an unknown volume of services that will be rendered over the course of the contract. We recognize revenue for these services in the period in which they are provided to the customer based on the contractual rate at which we have the right to invoice the customer for each action.

Some of our contracts with customers contain clauses that define the level of service that the customer will receive. The service level agreements (“SLA”) within those contracts contain specific calculations to determine whether the appropriate level of service has been met within a specific period, which is typically a month. We estimate SLA penalties and recognize the amounts as a reduction to revenue.

Taxes collected from customers and remitted to governmental authorities are not included in revenues in the condensed consolidated statements of operations.

Certain of our services involve the leasing of assets, such as safes, to our customers along with the regular servicing of those safe devices. Revenues related to the leasing of these assets are recognized in accordance with applicable lease guidance, but are included in the above table as the amounts are a small percentage of overall revenues.

Contract Balances

Contract Assets

Although payment terms and conditions can vary, for the majority of our customer contracts, we invoice for all of the services provided to the customer within a monthly period. For certain customer contracts, the timing of our performance may precede our right to invoice the customer for the total transaction price. For example, Brink's affiliates in certain countries, primarily in Latin America, negotiate annual price adjustments with certain customers and, once the price increases are finalized, the pricing changes are made retroactive to services provided in earlier periods. These retroactive pricing adjustments are estimated and recognized as revenue with a corresponding contract asset in the same period in which the related services are performed. As the estimate of the ultimate transaction price changes, we recognize a cumulative catch-up adjustment for the change in estimate. In our Rest of World segment, certain Brink's affiliates provide services to specific customers and, per contract, a portion of the consideration is retained by the customers until the contract is completed. The retention amounts are reported as contract assets until we have the right to bill the customer for these amounts. Certain Brink's affiliates make upfront consideration payments in order to gain customer contracts. The upfront payment amounts are reported as contract assets and are amortized as a reduction to revenues over the duration of the contracts. Contract assets expected to be billed or amortized within one year ($7.8 million at September 30, 2025) are included in prepaid expenses and other on the condensed consolidated balance sheet. Amounts not expected to be billed or amortized within one year ($18.5 million at September 30, 2025) are reported in other assets on the condensed consolidated balance sheet.

Contract Liabilities

For other customer contracts, we may obtain the right to payment or receive customer payments prior to performing the related services under the contract. When the right to customer payments or receipt of payments precedes our performance, we recognize a contract liability, which is included in accrued liabilities on the condensed consolidated balance sheet.

The amount of revenue recognized in the nine months ended September 30, 2025 that was included in the January 1, 2025 contract liabilities balance was $11.5 million. This revenue consists of services provided to customers who had prepaid for those services prior to the current year.

Revenue recognized in the nine months ended September 30, 2025 from performance obligations satisfied in the prior year was not significant. This revenue is a result of changes in the transaction price of our contracts with customers.

Contract Costs

Sales commissions directly related to obtaining new contracts with customers are capitalized when incurred and are then amortized to expense ratably over the term of the contracts. At September 30, 2025, the net capitalized costs to obtain contracts was included in other assets on the condensed consolidated balance sheet. The capitalized amounts at September 30, 2025 and December 31, 2024 were $13.3 million and $12.8 million, respectively.

Practical Expedients

For the majority of our contracts with customers, we invoice a fixed amount for each unit of service we have provided. These contracts provide us with the right to invoice for an amount or rate that corresponds to the value we have delivered to our customers. The volume of services that will be provided to customers over the term is not known at inception of these contracts. Therefore, while the rate per unit of service is known, the transaction price itself is variable. For this reason, we recognize revenue from these contracts equal to the amount for which we have the contractual right to invoice the customers. Because we are not required to estimate variable consideration related to the transaction price in order to recognize revenue, we are also not required to estimate the variable consideration to provide certain disclosures. As a result, we have elected to use the optional exemption related to the disclosure of transaction prices, amounts allocated to remaining performance obligations and the future periods in which revenue will be recognized, sometimes referred to as backlog.

We have also elected to use the practical expedient for financing components related to our contract liabilities. We do not recognize interest expense on contracts for which the period between our receipt of customer payments and our service to the customer is one year or less.