Basis of presentation (Policies)	6 Months Ended
Jun. 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 4% of our consolidated revenues for the first six months of 2025 and 3% of our consolidated revenues for the first six 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 six months of 2025 and 2024, the Argentine peso declined approximately 14% (from 1,031.0 to 1,203.6 pesos to the U.S. dollar) and 9% (from 833.3 to 911.5 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 six months of 2025, we recognized a $14.1 million pretax remeasurement loss. In the first six months of 2024, we recognized a $6.4 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 June 30, 2025, Argentina's economy remained highly inflationary for accounting purposes. At June 30, 2025, we had net monetary assets denominated in Argentine pesos of $17.4 million (including cash of $16.9 million). At June 30, 2025, we had net nonmonetary assets of $186.5 million (including $102.6 million of goodwill and $49.3 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 June 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.

Basis of presentation (Policies)

6 Months Ended

Jun. 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 4% of our consolidated revenues for the first six months of 2025 and 3% of our consolidated revenues for the first six 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 six months of 2025 and 2024, the Argentine peso declined approximately 14% (from 1,031.0 to 1,203.6 pesos to the U.S. dollar) and 9% (from 833.3 to 911.5 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 six months of 2025, we recognized a $14.1 million pretax remeasurement loss. In the first six months of 2024, we recognized a $6.4 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 June 30, 2025, Argentina's economy remained highly inflationary for accounting purposes. At June 30, 2025, we had net monetary assets denominated in Argentine pesos of $17.4 million (including cash of $16.9 million). At June 30, 2025, we had net nonmonetary assets of $186.5 million (including $102.6 million of goodwill and $49.3 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 June 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.