Revenue from contracts with customers (Tables)

6 Months Ended

Jun. 30, 2019

Revenue from Contract with Customer [Abstract]

Disaggregation of Revenue

Revenue Disaggregated by Reportable Segment and Type of Service

(In millions)	Core Services		High-Value Services		Other Security Services	Total
Three months ended June 30, 2019
Reportable Segments:
North America	$	279.8	162.7		—	442.5
South America	118.8		104.0		2.4	225.2
Rest of World	88.1		124.4		34.1	246.6
Total reportable segments	486.7		391.1		36.5	914.3
Not Allocated to Segments:
Acquisitions and dispositions	—		(0.3	)	—	(0.3	)
Total	$	486.7	390.8		36.5	914.0
Three months ended June 30, 2018
Reportable Segments:
North America	$	189.8	134.2		—	324.0
South America	113.9		116.2		3.2	233.3
Rest of World	88.3		128.9		49.6	266.8
Total reportable segments	392.0		379.3		52.8	824.1
Not Allocated to Segments:
Venezuela	7.7		17.9		—	25.6
Total	$	399.7	397.2		52.8	849.7
Six months ended June 30, 2019
Reportable Segments:
North America	$	557.0	320.0		—	877.0
South America	238.0		212.1		5.4	455.5
Rest of World	176.1		243.7		67.0	486.8
Total reportable segments	971.1		775.8		72.4	1,819.3
Not Allocated to Segments:
Acquisitions and dispositions	—		(0.3	)	—	(0.3	)
Total	$	971.1	775.5		72.4	1,819.0
Six months ended June 30, 2018
Reportable Segments:
North America	$	379.8	264.3		—	644.1
South America	239.3		242.7		6.1	488.1
Rest of World	181.9		259.3		104.0	545.2
Total reportable segments	801.0		766.3		110.1	1,677.4
Not Allocated to Segments:
Venezuela	18.4		33.0		—	51.4
Total	$	819.4	799.3		110.1	1,728.8

Contract with Customer, Asset and Liability

The opening and closing balances of receivables, contract assets and contract liabilities related to contracts with customers are as follows:

(In millions)	Receivables		Contract Asset		Contract Liability
Opening (January 1, 2019)	$	599.5	1.8		2.5
Closing (June 30, 2019)	678.3		0.9		8.5
Increase (decrease)	$	78.8	(0.9	)	6.0