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Subsequent Event (Details) - USD ($) $ in Millions | Apr. 30, 2019 | Mar. 31, 2019
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Disputed Contract Termination | PRONATEL | Subsequent Event |  |
Subsequent Event [Line Items] |  |
Claim for on demand bonds exercised | $ 25.0 |
Telecommunication Networks Construction and Operation |  |
Subsequent Event [Line Items] |  |
Aggregate consideration for projects |  | $ 260.0
Telecommunication Networks Construction |  |
Subsequent Event [Line Items] |  |
Aggregate consideration for projects |  | $ 182.0
Percent of project completion |  | 85.00%
Net receivable position on projects |  | $ 54.9

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