Consolidated Statements of Cash Flows - USD ($)	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Cash flows from operating activities:
Net income (loss)	$ 23,600,000	$ 44,800,000	$ (28,200,000)
Adjustments to reconcile net income (loss) to net cash provided by operating activities:
Loss from discontinued operations, net of tax	200,000	1,700,000	2,800,000
Depreciation and amortization	146,600,000	131,600,000	139,900,000
Share-based compensation expense	17,700,000	9,500,000	14,100,000
Deferred income taxes	94,200,000	(2,900,000)	7,100,000
Prepayment penalties	8,300,000	0	0
Property and other assets	(9,200,000)	1,300,000	(900,000)
Other gains and losses	(2,800,000)	(600,000)	5,200,000
Venezuela impairment	0	0	35,300,000
Other impairment losses	3,400,000	20,600,000	1,900,000
Retirement benefit funding (more) less than expense:
Pension	15,900,000	13,600,000	10,800,000
Other than pension	17,900,000	13,700,000	9,200,000
Remeasurement losses due to Venezuela currency devaluations	9,100,000	4,800,000	18,100,000
Other operating	6,000,000	3,700,000	2,600,000
Changes in operating assets and liabilities, net of effects of acquisitions:
Accounts receivable and income taxes receivable	(164,900,000)	(53,200,000)	(44,800,000)
Accounts payable, income taxes payable and accrued liabilities	100,900,000	13,900,000	20,100,000
Customer obligations	6,100,000	(13,200,000)	12,500,000
Prepaid and other current assets	(11,400,000)	(10,000,000)	(3,400,000)
Other	(9,500,000)	(11,800,000)	(4,400,000)
Discontinued operations	0	0	(2,000,000)
Net cash provided by operating activities	252,100,000	167,500,000	195,900,000
Cash flows from investing activities:
Capital expenditures	(174,500,000)	(112,200,000)	(101,100,000)
Acquisitions, net of cash acquired	(225,100,000)	(700,000)	0
Proceeds from Divestiture of Businesses, Net of Cash Divested	1,400,000	(600,000)	(14,600,000)
Marketable securities:
Purchases	(38,000,000)	(9,200,000)	(27,300,000)
Sales	38,300,000	9,100,000	33,900,000
Cash proceeds from sale of property, equipment and investments	1,900,000	4,700,000	1,900,000
Other	1,100,000	0	3,500,000
Net cash used by investing activities	(394,900,000)	(108,900,000)	(103,700,000)
Cash flows from financing activities:
Short-term borrowings	(125,200,000)	115,000,000	(22,700,000)
Long-term revolving credit facilities: Borrowings	941,800,000	494,000,000	569,500,000
Long-term revolving credit facilities: Repayments	(999,900,000)	(606,200,000)	(633,900,000)
Other long-term debt: Borrowings	1,109,900,000	4,800,000	86,100,000
Other long-term debt: Repayments	(187,400,000)	(39,000,000)	(42,000,000)
Debt financing costs	(16,300,000)	0	(2,000,000)
Payment of acquisition-related obligation	(90,900,000)	0	0
Nonrecourse financing of real estate transaction	0	0	14,500,000
Prepayment penalties	(8,300,000)	0	0
Common stock issued	0	3,000,000	0
Dividends to:
Shareholders of Brink’s	(27,700,000)	(19,800,000)	(19,500,000)
Noncontrolling interests in subsidiaries	(4,600,000)	(4,600,000)	(5,300,000)
Proceeds from exercise of stock options	2,700,000	12,200,000	3,800,000
Minimum tax withholdings associated with share-based compensation	(10,200,000)	(6,600,000)	(2,000,000)
Other	1,900,000	2,300,000	1,000,000
Net cash provided (used) by financing activities	585,800,000	(44,900,000)	(52,500,000)
Effect of exchange rate changes on cash and cash equivalents	(12,200,000)	(12,100,000)	(34,000,000)
Cash and cash equivalents:
Increase	430,800,000	1,600,000	5,700,000
Balance at beginning of period	183,500,000	181,900,000	176,200,000
Balance at end of period	$ 614,300,000	$ 183,500,000	$ 181,900,000