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Other Retirement Plans
 12 Months Ended
Dec. 31, 2024
Retirement Benefits [Abstract]  
Other Retirement Plans Other Retirement Plans
Multiemployer Plans
As discussed in Note 1 - Business, Basis of Presentation and Significant Accounting Policies, certain of MasTec’s subsidiaries are party to various collective bargaining agreements with unions representing certain of their employees, which require the Company to pay specified wages, provide certain benefits to their union employees and contribute certain amounts to MEPPs. The PPA defines the funding rules for defined benefit pension plans and establishes funding classifications for U.S.-registered multiemployer pension plans. Under the PPA, plans are classified into one of five categories based on multiple factors, which categories are also referred to as a plan’s “zone status”: Green (safe), Yellow (endangered), Orange (seriously endangered), and Red (critical or critical and declining). Factors included in the determination of a plan’s zone status include: funded percentage, cash flow position and whether the plan is projecting a minimum funding deficiency.
A multiemployer plan that is so underfunded as to be in “endangered,” “seriously endangered,” “critical,” or “critical and declining” status, as determined under the PPA, is required to adopt a funding improvement plan (“FIP”) or a rehabilitation plan (“RP”), which, among other actions, could include decreased benefits and increased employer contributions, which could take the form of a surcharge on benefit contributions. These actions are intended to improve their funding status over a period of years. If a pension fund is in critical status, a participating employer must pay an automatic surcharge in addition to contributions otherwise required under the collective bargaining agreement (“CBA”). With some exceptions, the surcharge is equal to 5% of required contributions for the initial critical year and 10% for each succeeding plan year in which the plan remains in critical status. The surcharge ceases on the effective date of a CBA or other agreement that includes contribution and benefit terms consistent with the rehabilitation plan. Certain plans in which the Company participates are in “endangered,” “seriously endangered,” “critical,” or “critical and declining” status. The amount of additional funds, if any, that the Company could be obligated to contribute to these plans in the future cannot be estimated due to the uncertainty of the future levels of work that could be required of the union employees covered by these plans, as well as the required future contribution rates and possible surcharges applicable to these plans. See Note 14 - Commitments and Contingencies for additional information.
Details of significant multiemployer pension plans as of and for the periods indicated, based upon information available to the Company from plan administrators, as well as publicly available information on the U.S. Department of Labor website, are provided in the following table:
Contributions
(in millions)
For the Years Ended December 31,		Pension Protection Act Zone Status
Multiemployer Pension PlanEmployer Identification NumberPlan Number202420232022Expiration Date of CBA2024As of2023As ofFIP/RP StatusSurcharge
National Electrical Benefit Fund530181657001$24.1 $18.3 $17.7 
Varies through 6/3/2029
Green12/31/2023(a)Green12/31/2022(a)NANo
Central Pension Fund of the IUOE & Participating Employers36605239000116.8 19.2 8.1 
Varies through 6/30/2027
Green1/31/2024(a)Green1/31/2023—NANo
IBEW Local 456 Pension Plan2262389950013.9 3.1 3.2 11/29/2025Green12/31/2023(a)Green12/31/2022(a)NANo
Pipeline Industry Pension Fund7361464330013.8 6.0 2.3 
Varies through 10/31/2026
Green12/31/2023(a)Green12/31/2022(a)NANo
Laborers' District Council of Virginia Pension Trust Fund5461172990013.6 2.9 0.1 5/31/2026Green12/31/2023—Green12/31/2022—NANo
Heavy & General Laborers' Local Unions 472 and 172 of New Jersey Pension Fund2260321030013.5 3.7 3.7 
Varies through 2/28/2027
Green3/31/2024(a)Green3/31/2023(a)NANo
Local Union No. 9 IBEW and Outside Contractors Pension Fund5160777200013.5 7.2 9.3 
Varies through 5/31/2026
Green10/31/2023(a)Green10/31/2022(a)NANo
IBEW Local 1249 Pension Plan1560351610013.2 3.4 3.3 
Varies through 12/31/2025
Green12/31/2023—Green12/31/2022—NANo
Central Laborers' Pension Fund3760523790013.0 2.3 1.3 
Varies through 6/30/2027
Yellow12/31/2023(b)Yellow12/31/2022(b)ImplementedNo
Teamsters National Pipe Line Pension Plan4611028510012.9 3.9 1.5 
Varies through 6/30/2026
Green12/31/2023(a)Green12/31/2022(a)NANo
Construction Laborers Pension Trust for Southern California4361590560012.6 2.9 3.4 
Varies through 5/31/2028
Green12/31/2023(a)Green12/31/2022(a)NANo
West Virginia Laborers' Pension Trust Fund5560267750012.1 3.2 0.9 5/31/2026Green3/31/2024(a)Green3/31/2023—NANo
Chicago & Vicinity Laborers' District Council Pension Plan3625145140022.0 1.4 2.5 
Varies through 6/30/2027
Green5/31/2023—Green5/31/2022—NANo
Midwest Operating Engineers Pension Trust Fund3661400970011.7 2.7 2.1 
Varies through 5/31/2027
Green3/31/2024—Green3/31/2023—NANo
IUOE Local 132 Pension Fund5560153640011.6 3.6 0.7 
Varies through 3/31/2029
Green3/31/2024(a)Green3/31/2023—NANo
Laborers' National Pension Fund7512808270011.6 1.6 0.6 
Varies through 5/31/2026
Red12/31/2023—Red12/31/2022—ImplementedNo
San Diego County Construction Laborers' Pension Trust Fund9560905410011.3 1.4 1.5 6/30/2026Green8/31/2023(a)Green8/31/2022—NANo
Carpenters Pension Fund of Illinois3661473960011.3 0.9 0.2 4/30/2025Green12/31/2023—Green12/31/2022—NANo
Laborers' Local Union No. 158 Pension Plan2365803230011.1 1.2 1.5 
Varies through 5/31/2027
Green12/31/2023(a)Green12/31/2022(a)NANo
Employer - Teamsters Local Nos. 175 & 505 Pension Trust Fund5560218500010.9 1.8 0.5 5/31/2026Red12/31/2023—Red12/31/2022(b)ImplementedNo
IBEW Local 769 Management Pension Plan A8660497630010.5 4.0 0.6 
Varies through 8/4/2026
Green6/30/2023(a)Green6/30/2022(a)NANo
Other funds23.6 23.7 24.0 
Total multiemployer pension plan contributions$108.6 $118.4 $89.0 
(a)The Company’s contributions to this plan represent greater than 5% of the plan’s total contributions.
(b)This plan has utilized extended amortization provisions, which provide plans with extensions of time to amortize pension funding shortfalls.
The number of union employees employed at a given time, and the plans in which they participate, vary depending upon the location and number of ongoing projects and the need for union resources in connection with those projects. Total contributions to multiemployer plans and the related number of employees covered by these plans for the periods indicated were as follows:
Multiemployer Plans
Covered Employees
Contributions
(in millions)
For the Years Ended December 31:LowHighPensionOther MultiemployerTotal
20246,960 9,448 $108.6 $41.8 $150.4 
20236,806 11,025 $118.4 $59.1 $177.5 
20226,601 7,136 $89.0 $56.3 $145.3 
The fluctuations in the number of employees covered under multiemployer plans and associated contributions in the table above related primarily to the timing of activity for the Company’s union resource-based projects, as well as the effects of the Company’s acquisitions. For the year ended December 31, 2024, multiemployer plan activity was driven primarily by project work within the Company’s Power Delivery and Pipeline Infrastructure operations, whereas for the year ended December 31, 2023, activity was driven primarily by project work within the Company’s Power Delivery and Pipeline Infrastructure operations, and, to a lesser extent, by acquisition-related project work within the Company’s Clean Energy and Infrastructure operations. For the year ended December 31, 2022, activity was driven primarily by acquisition-related project work within the Company’s Power Delivery operations, and, to a lesser extent, its Pipeline Infrastructure operations.