Condensed Consolidated Statements of Operations (Unaudited) - USD ($) shares in Millions, $ in Millions		3 Months Ended		9 Months Ended
		Sep. 30, 2017	Sep. 30, 2016	Sep. 30, 2017	Sep. 30, 2016
Income Statement [Abstract]
Revenues		$ 849.5	$ 755.8	$ 2,443.8	$ 2,217.1
Costs and expenses:
Cost of revenues		666.4	594.4	1,905.6	1,779.4
Selling, general and administrative expenses		116.6	102.2	346.5	315.9
Total costs and expenses		783.0	696.6	2,252.1	2,095.3
Other operating income (expense)		(0.1)	0.5	(6.1)	(6.4)
Operating profit		66.4	59.7	185.6	115.4
Interest expense		(7.7)	(5.1)	(18.5)	(14.9)
Interest and other expense		(21.2)	(9.2)	(43.8)	(28.3)
Income from continuing operations before tax		37.5	45.4	123.3	72.2
Provision for income taxes		16.4	19.5	48.1	43.4
Income from continuing operations		21.1	25.9	75.2	28.8
Loss from discontinued operations, net of tax		0.0	0.0	(0.1)	0.0
Net income		21.1	25.9	75.1	28.8
Less net income attributable to noncontrolling interests		1.2	1.4	6.3	7.1
Net income attributable to Brink’s		19.9	24.5	68.8	21.7
Amounts attributable to Brink’s
Continuing operations		19.9	24.5	68.9	21.7
Discontinued operations		0.0	0.0	(0.1)	0.0
Net income attributable to Brink’s		$ 19.9	$ 24.5	$ 68.8	$ 21.7
Basic:
Continuing operations (dollars per share)	[1]	$ 0.39	$ 0.49	$ 1.36	$ 0.44
Discontinued operations (dollars per share)	[1]	0.00	0.00	0.00	0.00
Net income (loss) (dollars per share)	[1]	0.39	0.49	1.36	0.44
Diluted:
Continuing operations (dollars per share)	[1]	0.38	0.48	1.33	0.43
Discontinued operations (dollars per share)	[1]	0.00	0.00	0.00	0.00
Net income (loss) (dollars per share)	[1]	$ 0.38	$ 0.48	$ 1.33	$ 0.43
Weighted-average shares
Basic (shares)		50.7	50.1	50.7	49.8
Diluted (shares)		51.9	50.7	51.6	50.4
Cash dividends paid per common share (dollars per share)		$ 0.15	$ 0.1	$ 0.40	$ 0.3

[1] Amounts may not add due to rounding.