Commitments and Contingencies - Legal Proceedings (Details) - USD ($) $ in Millions		1 Months Ended		3 Months Ended	12 Months Ended		52 Months Ended
	Jul. 01, 2019	Apr. 30, 2019	Feb. 28, 2019	Sep. 30, 2017	Dec. 31, 2019	Dec. 31, 2015	Apr. 30, 2019
Lorenzo Benton v Telecom Network Specialists Inc | Maximum
Loss Contingencies [Line Items]
Reasonably possible amount of loss					$ 9.1
Damages awarded			$ 7.5
Termination of the Peru Telecommunications Project
Loss Contingencies [Line Items]
Charge to earnings related to legal proceedings					79.2
Net receivable position on projects					120.0
Redes | Telecommunication Networks Construction and Operation
Loss Contingencies [Line Items]
Term of post-construction operation and maintenance period						10 years
Redes | Termination of the Peru Telecommunications Project
Loss Contingencies [Line Items]
Advance payments received							$ 87.0
On-demand performance bonds						$ 25.0
Construction costs incurred							157.0
Payments received on construction contracts							$ 100.0
Redes | Termination of the Peru Telecommunications Project | Telecommunication Networks Construction and Operation
Loss Contingencies [Line Items]
Aggregate consideration for projects						248.0
Aggregate consideration to be paid during the construction period						151.0
Aggregate consideration to be paid during the post-construction operation and maintenance period						$ 97.0
PRONATEL | Termination of the Peru Telecommunications Project
Loss Contingencies [Line Items]
Damages sought		$ 45.0
Bond proceeds received		$ 112.0
Amount collected through exercise of advance payment bonds					$ 87.0
QPS | Maurepas Project Dispute
Loss Contingencies [Line Items]
Damages sought				$ 22.0
Maurepas | Maurepas Project Dispute
Loss Contingencies [Line Items]
Damages sought	$ 59.0