Acquisitions and Dispositions - Pro Forma (Details) - USD ($)
$ in Millions |
3 Months Ended |
9 Months Ended |
Sep. 30, 2018 |
Sep. 30, 2017 |
Sep. 30, 2018 |
Sep. 30, 2017 |
| Business Acquisition [Line Items] |
|
|
|
|
| Actual revenue results included in consolidation |
$ 92.5
|
$ 39.5
|
$ 193.3
|
$ 46.5
|
| Actual net income results included in consolidation |
5.0
|
4.2
|
9.9
|
4.8
|
| Revenues |
852.4
|
849.5
|
2,581.2
|
2,443.8
|
| Reported net income (loss) attributable to Brink's |
17.4
|
19.9
|
(68.2)
|
68.8
|
| Pro forma revenue results |
898.7
|
966.0
|
2,825.2
|
2,849.7
|
| Pro forma net income results |
18.5
|
22.7
|
(62.8)
|
78.8
|
| Transaction costs |
5.9
|
1.5
|
5.9
|
1.5
|
| Dunbar |
|
|
|
|
| Business Acquisition [Line Items] |
|
|
|
|
| Actual revenue results included in consolidation |
51.3
|
0.0
|
51.3
|
0.0
|
| Actual net income results included in consolidation |
0.5
|
0.0
|
0.5
|
0.0
|
| Pro forma revenue results |
46.3
|
97.9
|
244.0
|
287.9
|
| Pro forma net income results |
1.1
|
1.6
|
5.4
|
1.0
|
| Maco |
|
|
|
|
| Business Acquisition [Line Items] |
|
|
|
|
| Actual revenue results included in consolidation |
16.4
|
21.5
|
61.0
|
21.5
|
| Actual net income results included in consolidation |
5.0
|
3.5
|
9.1
|
3.5
|
| Pro forma revenue results |
0.0
|
4.6
|
0.0
|
56.9
|
| Pro forma net income results |
0.0
|
0.6
|
0.0
|
6.2
|
| Other Acquisitions |
|
|
|
|
| Business Acquisition [Line Items] |
|
|
|
|
| Actual revenue results included in consolidation |
24.8
|
18.0
|
81.0
|
25.0
|
| Actual net income results included in consolidation |
(0.5)
|
0.7
|
0.3
|
1.3
|
| Pro forma revenue results |
0.0
|
14.0
|
0.0
|
61.1
|
| Pro forma net income results |
$ 0.0
|
$ 0.6
|
$ 0.0
|
$ 2.8
|