Consolidated Statements of Cash Flows - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Cash flows from operating activities:
Net income	$ 181.9	$ 117.3	$ 21.9
Adjustments to reconcile net income to net cash provided by operating activities:
(Income) loss from discontinued operations, net of tax	2.9	(2.1)	0.8
Depreciation and amortization	245.8	239.5	206.8
Share-based compensation expense	48.6	33.1	31.3
Deferred income taxes	(62.3)	14.6	(28.2)
(Gain) loss on sale of property, equipment and marketable securities	0.7	(17.7)	(11.6)
Gain on business dispositions	0.0	0.0	(4.1)
Impairment losses	9.0	9.5	11.6
Retirement benefit funding (more) less than expense:
Pension	(3.7)	12.4	9.5
Other than pension	7.9	14.2	14.3
Remeasurement losses due to Argentina currency devaluation	37.6	9.0	7.7
Other operating	23.6	(5.8)	15.6
Changes in operating assets and liabilities, net of effects of acquisitions:
Accounts receivable and income taxes receivable	(180.9)	(21.2)	45.1
Accounts payable, income taxes payable and accrued liabilities	139.2	45.1	(114.5)
Restricted cash held for customers	50.0	60.2	116.3
Customer obligations	50.0	15.7	(6.5)
Prepaid and other current assets	(56.7)	(16.8)	(24.5)
Other	(13.7)	(29.0)	26.2
Net cash provided by operating activities	479.9	478.0	317.7
Cash flows from investing activities:
Capital expenditures	(182.6)	(167.9)	(118.5)
Acquisitions, net of cash acquired	(173.9)	(313.2)	(439.7)
Dispositions, net of cash disposed	0.0	0.0	(2.6)
Marketable securities:
Purchases	(30.3)	(15.6)	(2.9)
Sales	11.7	35.1	2.0
Cash proceeds from sale of property, equipment and investments	5.7	7.7	5.3
Cash proceeds from settlement of cross currency swap	64.3	0.0	0.0
Net change in loans held for investment	(25.9)	0.0	0.0
Other	(0.2)	(0.8)	(9.0)
Net cash used by investing activities	(331.2)	(454.7)	(565.4)
Cash flows from financing activities:
Short-term borrowings	37.7	(4.3)	(3.9)
Cash supply chain customer debt	0.0	0.0	(10.5)
Long-term revolving credit facilities: Borrowings	7,058.7	3,385.5	897.8
Long-term revolving credit facilities: Repayments	(6,832.7)	(2,836.8)	(1,008.9)
Other long-term debt: Borrowings	189.9	7.7	1,022.6
Other long-term debt: Repayments	(87.0)	(140.7)	(98.5)
Acquisition of noncontrolling interests	(7.8)	0.0	0.0
Cash received from acquisition related settlements	0.0	6.2	9.7
Cash paid for acquisition related settlements and obligations	(2.8)	(4.0)	(7.3)
Debt financing costs	(5.6)	(0.8)	(13.2)
Repurchase shares of Brink's common stock	(52.2)	(200.0)	(50.0)
Dividends to:
Shareholders of Brink’s	(37.6)	(37.2)	(30.1)
Noncontrolling interests in subsidiaries	(7.1)	(5.1)	(16.8)
Proceeds from exercise of stock options	0.0	2.3	0.0
Tax withholdings associated with share-based compensation	(12.2)	(5.5)	(10.3)
Other	3.9	4.0	3.1
Net cash provided by financing activities	245.2	171.3	683.7
Effect of exchange rate changes on cash and cash equivalents	(70.1)	(50.8)	37.9
Cash, cash equivalents and restricted cash:
Increase	323.8	143.8	473.9
Balance at beginning of period	1,086.7	942.9	469.0
Balance at end of period	$ 1,410.5	$ 1,086.7	$ 942.9