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Commitments and Contingencies and Other Items (Details) plaintiff in Thousands, $ in Thousands | 1 Months Ended | 3 Months Ended |
--- | --- | --- | ---
Feb. 28, 2017 USD ($) lawsuit | Mar. 31, 2021 USD ($) Employee plaintiff contract | Dec. 31, 2005 USD ($) subsidiary
Loss Contingencies |  |  |
Estimate of possible loss |  | $ 119,000 |
Patents allegedly infringed | lawsuit | 1 |  |
Number of members (more than) | plaintiff |  | 12 |
Unfavorable Regulatory Action |  |  |
Loss Contingencies |  |  |
Estimate of possible loss |  | $ 300 |
Level 3 Parent, LLC |  |  |
Loss Contingencies |  |  |
Damages sought, value |  | $ 50,000 |
U.S. District Court for the District of Minnesota |  |  |
Loss Contingencies |  |  |
Number of members (more than) | plaintiff |  | 11 |
Missouri Municipalities | Judicial ruling |  |  |
Loss Contingencies |  |  |
Litigation settlement amount | $ 4,000 |  |
Minnesota Securities Investor Class Actions | U.S. District Court for the District of Minnesota |  |  |
Loss Contingencies |  |  |
Litigation settlement amount |  | $ 55,000 |
Peruvian Tax Litigation | Pending litigation |  |  |
Loss Contingencies |  |  |
Estimate of possible loss |  | 1,000 |
Number of subsidiaries issues with tax assessment | subsidiary |  |  | 1
Loss contingency, asserted claim |  |  | $ 26,000
Brazilian Tax Claims | Pending litigation |  |  |
Loss Contingencies |  |  |
Loss contingency, range of possible loss, portion not accrued |  | 12,000 |
Brazilian Tax Claims | Pending litigation | Maximum |  |  |
Loss Contingencies |  |  |
Loss contingency, range of possible loss, portion not accrued |  | $ 49,000 |
United States of America ex rel., Stephen Bishop v. Level 3 Communications, Inc. et al. |  |  |
Loss Contingencies |  |  |
Number of former employees names in lawsuit | Employee |  | 2 |
Number of government contracts in question | contract |  | 2 |
Number of former employees with plea agreements | Employee |  | 1 |

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