Basis of presentation (Policies)	9 Months Ended
Sep. 30, 2022
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. In the first quarter of 2022, we further refined our global methodology of estimating the allowance for doubtful accounts. Our previous method to estimate currently expected credit losses in receivables (the allowance) was weighted significantly to a review of historical loss rates and specific identification of higher risk customer accounts. It also considered current and expected economic conditions, particularly the effects of the coronavirus (COVID-19) pandemic, in determining an appropriate allowance. As many of our regions begin to recover from the pandemic, we have re-assessed those earlier assumptions and estimates. Our updated method now also includes an estimated allowance for accounts receivable significantly past due in order to adjust for at-risk receivables not captured in our previous method. As part of the analysis under the updated estimation methodology, we noted an increase in accounts receivable significantly past due, particularly in the U.S., and we recorded an additional allowance of $16.7 million in the first quarter of 2022. In the second and third quarters of 2022, the additional allowance was reduced by $0.7 million as a result of collections. Due to the fact that management has excluded this amount when evaluating internal performance, we have excluded it from segment results.
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. See "Venezuela" section below for further information. 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, 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 value of the equity securities are remeasured at the current exchange rates to determine gain or loss to be recorded in net income. 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 5% of our consolidated revenues for the first nine months of 2022 and 4% of our consolidated revenues for the first nine months of 2021. 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 2022 and 2021, the Argentine peso declined approximately 30% (from 103.1 to 147.1 pesos to the U.S. dollar) and approximately 15% (from 84.0 to 99.0 pesos to the U.S. dollar), respectively. For the year ended December 31, 2021, the Argentine peso declined approximately 19% (from 84.0 to 103.1 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 2022, we recognized a $24.4 million pretax remeasurement loss. In the first nine months of 2021, we recognized a $6.6 million pretax remeasurement loss. At September 30, 2022, Argentina's economy remains highly inflationary for accounting purposes. At September 30, 2022, we had net monetary assets denominated in Argentine pesos of $62.0 million (including cash of $66.4 million). At September 30, 2022, we had net nonmonetary assets of $162.8 million (including $99.8 million of goodwill, $1.7 million in equity securities denominated in Argentine pesos and $21.0 million in debt securities denominated in Argentine pesos). At December 31, 2021, we had net monetary assets denominated in Argentine pesos of $60.1 million (including cash of $52.9 million) and net nonmonetary assets of $155.3 million (including $99.8 million of goodwill, $8.2 million in equity securities denominated in Argentine pesos and $4.3 million in debt securities denominated in Argentine pesos). During September 2019, the Argentine government announced currency controls on both companies and individuals. The Argentine central bank issued details as to how the exchange control procedures would operate in practice. Under these procedures, central bank approval is required for many transactions, including dividend repatriation abroad. We have previously elected to use other market mechanisms to convert Argentine pesos into U.S. dollars. Conversions under these other market mechanisms generally settle at rates that are less favorable than the rates at which we remeasure the financial statements of Brink’s Argentina. We did not have any such conversion losses in the nine months ended September 30, 2022 or September 30, 2021. Although the Argentine government has implemented currency controls, Brink’s management continues to provide guidance and strategic oversight, including budgeting and forecasting for Brink’s Argentina. We continue to control our Argentina business for purposes of consolidation of our financial statements and continue to monitor the situation in Argentina. Venezuela Our Venezuelan operations offer transportation and route-based logistics management services for cash and valuables throughout Venezuela. Currency exchange regulations, combined with other government regulations, such as price controls and strict labor laws, significantly limit our ability to make and execute operational decisions at our Venezuelan subsidiaries. As a result of these conditions, we do not meet the accounting criteria for control over our Venezuelan operations and, as a result, we report the results of our investment in our Venezuelan subsidiaries using the cost method of accounting, the basis of which approximates zero. Prior to the imposition of the U.S. government sanctions in 2019, we provided immaterial amounts of financial support to our Venezuela operations. We continue to monitor the situation in Venezuela, including the imposition of sanctions by the U.S. government targeting Venezuela.
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, 2022 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.
Restricted Cash	Restricted CashIn France and Malaysia, we offer services to certain of our customers where we manage some or all of their cash supply chains. In connection with these offerings, we take temporary title to certain customers' cash, which is included as restricted cash in our financial statements due to customer agreement or regulation.
New Accounting Standards	New Accounting Standards In December 2019, the FASB issued ASU 2019-12, Income Taxes (Topic 740): Simplifying the Accounting for Income Taxes, which removes certain exceptions for recognizing deferred taxes for investments, performing intraperiod tax allocations and calculating income taxes in interim periods. The ASU also adds guidance to reduce complexity in certain areas, including recognizing deferred taxes for tax goodwill and allocating taxes to members of a consolidated group. ASU 2019-12 was effective for us on January 1, 2021. We recognized a cumulative-effect adjustment increasing retained earnings by $0.5 million on January 1, 2021.

Basis of presentation (Policies)

9 Months Ended

Sep. 30, 2022

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.

In the first quarter of 2022, we further refined our global methodology of estimating the allowance for doubtful accounts. Our previous method to estimate currently expected credit losses in receivables (the allowance) was weighted significantly to a review of historical loss rates and specific identification of higher risk customer accounts. It also considered current and expected economic conditions, particularly the effects of the coronavirus (COVID-19) pandemic, in determining an appropriate allowance. As many of our regions begin to recover from the pandemic, we have re-assessed those earlier assumptions and estimates. Our updated method now also includes an estimated allowance for accounts receivable significantly past due in order to adjust for at-risk receivables not captured in our previous method. As part of the analysis under the updated estimation methodology, we noted an increase in accounts receivable significantly past due, particularly in the U.S., and we recorded an additional allowance of $16.7 million in the first quarter of 2022. In the second and third quarters of 2022, the additional allowance was reduced by $0.7 million as a result of collections. Due to the fact that management has excluded this amount when evaluating internal performance, we have excluded it from segment results.

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. See "Venezuela" section below for further information. 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, 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 value of the equity securities are remeasured at the current exchange rates to determine gain or loss to be recorded in net income. 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 5% of our consolidated revenues for the first nine months of 2022 and 4% of our consolidated revenues for the first nine months of 2021.

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 2022 and 2021, the Argentine peso declined approximately 30% (from 103.1 to 147.1 pesos to the U.S. dollar) and approximately 15% (from 84.0 to 99.0 pesos to the U.S. dollar), respectively. For the year ended December 31, 2021, the Argentine peso declined approximately 19% (from 84.0 to 103.1 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 2022, we recognized a $24.4 million pretax remeasurement loss. In the first nine months of 2021, we recognized a $6.6 million pretax remeasurement loss.

At September 30, 2022, Argentina's economy remains highly inflationary for accounting purposes. At September 30, 2022, we had net monetary assets denominated in Argentine pesos of $62.0 million (including cash of $66.4 million). At September 30, 2022, we had net nonmonetary assets of $162.8 million (including $99.8 million of goodwill, $1.7 million in equity securities denominated in Argentine pesos and $21.0 million in debt securities denominated in Argentine pesos).

At December 31, 2021, we had net monetary assets denominated in Argentine pesos of $60.1 million (including cash of $52.9 million) and net nonmonetary assets of $155.3 million (including $99.8 million of goodwill, $8.2 million in equity securities denominated in Argentine pesos and $4.3 million in debt securities denominated in Argentine pesos).

During September 2019, the Argentine government announced currency controls on both companies and individuals. The Argentine central bank issued details as to how the exchange control procedures would operate in practice. Under these procedures, central bank approval is required for many transactions, including dividend repatriation abroad.

We have previously elected to use other market mechanisms to convert Argentine pesos into U.S. dollars. Conversions under these other market mechanisms generally settle at rates that are less favorable than the rates at which we remeasure the financial statements of Brink’s Argentina. We did not have any such conversion losses in the nine months ended September 30, 2022 or September 30, 2021.

Although the Argentine government has implemented currency controls, Brink’s management continues to provide guidance and strategic oversight, including budgeting and forecasting for Brink’s Argentina. We continue to control our Argentina business for purposes of consolidation of our financial statements and continue to monitor the situation in Argentina.

Venezuela

Our Venezuelan operations offer transportation and route-based logistics management services for cash and valuables throughout Venezuela. Currency exchange regulations, combined with other government regulations, such as price controls and strict labor laws, significantly limit our ability to make and execute operational decisions at our Venezuelan subsidiaries. As a result of these conditions, we do not meet the accounting criteria for control over our Venezuelan operations and, as a result, we report the results of our investment in our Venezuelan subsidiaries using the cost method of accounting, the basis of which approximates zero. Prior to the imposition of the U.S. government sanctions in 2019, we provided immaterial amounts of financial support to our Venezuela operations. We continue to monitor the situation in Venezuela, including the imposition of sanctions by the U.S. government targeting Venezuela.

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, 2022 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.

Restricted Cash

Restricted CashIn France and Malaysia, we offer services to certain of our customers where we manage some or all of their cash supply chains. In connection with these offerings, we take temporary title to certain customers' cash, which is included as restricted cash in our financial statements due to customer agreement or regulation.

New Accounting Standards

In December 2019, the FASB issued ASU 2019-12, Income Taxes (Topic 740): Simplifying the Accounting for Income Taxes, which removes certain exceptions for recognizing deferred taxes for investments, performing intraperiod tax allocations and calculating income taxes in interim periods. The ASU also adds guidance to reduce complexity in certain areas, including recognizing deferred taxes for tax goodwill and allocating taxes to members of a consolidated group. ASU 2019-12 was effective for us on January 1, 2021. We recognized a cumulative-effect adjustment increasing retained earnings by $0.5 million on January 1, 2021.