Condensed Consolidated Statements of Operations (Unaudited) - USD ($) shares in Millions, $ in Millions		3 Months Ended		6 Months Ended
		Jun. 30, 2020	Jun. 30, 2019	Jun. 30, 2020	Jun. 30, 2019
Income Statement [Abstract]
Revenues		$ 826.0	$ 914.0	$ 1,698.8	$ 1,819.0
Costs and expenses:
Cost of revenues		683.9	708.5	1,377.3	1,411.2
Selling, general and administrative expenses		139.6	154.6	287.7	296.3
Total costs and expenses		823.5	863.1	1,665.0	1,707.5
Other operating income (expense)		(3.5)	1.7	(8.6)	(0.5)
Operating profit (loss)		(1.0)	52.6	25.2	111.0
Interest expense		(23.2)	(22.7)	(43.2)	(45.7)
Interest and other nonoperating income (expense)		(3.0)	(3.1)	(18.6)	(14.3)
Income (loss) from continuing operations before tax		(27.2)	26.8	(36.6)	51.0
Provision (benefit) for income taxes		(43.2)	12.7	(55.4)	22.4
Income from continuing operations		16.0	14.1	18.8	28.6
Loss from discontinued operations, net of tax		(0.8)	(0.1)	(0.8)	(0.1)
Net income		15.2	14.0	18.0	28.5
Less net income attributable to noncontrolling interests		2.3	1.5	3.3	2.3
Net income attributable to Brink’s		12.9	12.5	14.7	26.2
Amounts attributable to Brink’s
Continuing operations		13.7	12.6	15.5	26.3
Discontinued operations		$ (0.8)	$ (0.1)	$ (0.8)	$ (0.1)
Basic:
Continuing operations (dollars per share)	[1]	$ 0.27	$ 0.25	$ 0.31	$ 0.53
Discontinued operations (dollar per share)	[1]	(0.02)	0	(0.02)	0
Net income (dollars per share)	[1]	0.25	0.25	0.29	0.52
Diluted:
Continuing operations (dollars per share)	[1]	0.27	0.25	0.30	0.52
Discontinued operations (dollar per share)	[1]	(0.01)	0	(0.02)	0
Net income (dollars per share)	[1]	$ 0.25	$ 0.25	$ 0.29	$ 0.51
Weighted-average shares
Basic (shares)		50.8	50.2	50.7	50.1
Diluted (shares)		51.0	50.9	51.2	50.9
Cash dividends paid per common share (dollars per share)		$ 0.15	$ 0.15	$ 0.30	$ 0.30

[1] Amounts may not add due to rounding.