Condensed Consolidated Statement of Equity (Unaudited) - USD ($) shares in Millions, $ in Millions		Total	Common Stock	Capital in Excess of Par Value	Retained Earnings	Accumulated Other Comprehensive Loss	Attributable to Noncontrolling Interests
Beginning balance at Dec. 31, 2015		$ 330.6	$ 48.9	$ 599.6	$ 561.3	$ (891.9)	$ 12.7
Beginning balance, Shares at Dec. 31, 2015			48.9
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income (loss)		2.9			(2.8)		5.7
Other comprehensive income		29.2				28.2	1.0
Common stock issued (in shares)			0.1
Common stock issued		2.5	$ 0.1	2.4
Dividends to:
Brink’s common shareholders ($0.10 per share)		(9.8)			(9.8)
Noncontrolling interests		(2.1)					(2.1)
Share-based compensation:
Compensation expense		4.9		4.9
Consideration from exercise of stock options		3.5	$ 0.1	3.4
Consideration from exercise of stock options, Shares			0.1
Other share-based benefit transactions		(3.6)	$ 0.4	(3.9)	(0.1)
Other share-based benefit transactions, shares			0.4
Ending balance at Jun. 30, 2016		358.3	$ 49.5	606.4	548.8	(863.7)	17.3
Ending balance, Shares at Jun. 30, 2016			49.5
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Cumulative effect of change in accounting principle	[1]	0.2			0.2
Net income (loss)		3.4
Other comprehensive income		4.0				3.8
Ending balance at Jun. 30, 2016		358.3	$ 49.5	606.4	548.8	(863.7)	17.3
Ending balance, Shares at Jun. 30, 2016			49.5
Beginning balance at Dec. 31, 2016		354.8	$ 50.0	618.1	576.0	(907.0)	17.7
Beginning balance, Shares at Dec. 31, 2016			50.0
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income (loss)		54.0			48.9		5.1
Other comprehensive income		46.5				47.2	(0.7)
Dividends to:
Brink’s common shareholders ($0.10 per share)		(12.6)			(12.6)
Noncontrolling interests		(2.6)					(2.6)
Share-based compensation:
Compensation expense		8.5		8.5
Consideration from exercise of stock options		2.6		2.6
Other share-based benefit transactions		(8.4)	$ 0.4	(8.8)
Other share-based benefit transactions, shares			0.4
Ending balance at Jun. 30, 2017		$ 442.8	$ 50.4	$ 620.4	$ 612.3	$ (859.8)	$ 19.5
Ending balance, Shares at Jun. 30, 2017			50.4

[1] We elected to early adopt the provisions of ASU 2016-09, Improvements to Employee Share-Based Payment Accounting, in the fourth quarter of 2016 resulting in a cumulative effect adjustment to Retained Earnings for previously unrecognized excess tax benefits. See Note 1 for further discussion of the impacts of this standard.