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Other Retirement Plans (Tables)
 12 Months Ended
Dec. 31, 2023
Retirement Benefits [Abstract]  
Schedule of Multiemployer Pension Plans
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 Number202320222021Expiration Date of CBA2023As of2022As ofFIP/RP StatusSurcharge
Central Pension Fund of the IUOE & Participating Employers366052390001$19.2 $8.1 $27.4 
Varies through 04/30/2027
Green1/31/2023Green1/31/2022NANo
National Electrical Benefit Fund53018165700118.3 17.7 5.9 
Varies through 1/2/2028
Green12/31/2022(a)Green12/31/2021NANo
Local Union No. 9 IBEW and Outside Contractors Pension Fund5160777200017.2 9.3 4.7 
Varies through 5/31/2026
Green10/31/2022(a)Green10/31/2021(a)NANo
Pipeline Industry Pension Fund7361464330016.0 2.3 10.9 
Varies through 5/31/2026
Green12/31/2022(a)Green12/31/2021NANo
IBEW Local 769 Management Pension Plan A8660497630014.0 0.6 0.5 
Varies through 8/4/2026
Green6/30/2022(a)Green 6/30/2021NANo
Teamsters National Pipe Line Pension Plan4611028510013.9 1.5 6.2 5/31/2026Green12/31/2022(a)Green12/31/2021(a)NANo
Heavy & General Laborers' Local Unions 472 and 172 of New Jersey Pension Fund2260321030013.7 3.7 0.0 
Varies through 5/31/2026
Green3/31/2023(a)Green3/31/2022NANo
IUOE Local 132 Pension Fund5560153640013.6 0.7 1.4 
Varies through 5/31/2026
Green3/31/2023Green3/31/2022(a)NANo
IBEW Local 1249 Pension Plan1560351610013.4 3.3 1.4 
Varies through 12/31/2025
Green12/31/2022Green12/31/2021NANo
West Virginia Laborers' Pension Trust Fund5560267750013.2 0.9 2.5 5/31/2026Green3/31/2023Green3/31/2022(a)NANo
IBEW Local 456 Pension Plan2262389950013.1 3.2 0.0 11/29/2025Green12/31/2022(a)Green12/31/2021(a)NANo
Laborers' District Council of Virginia Pension Trust Fund5461172990012.9 0.1 1.6 5/31/2026Green12/31/2022Green12/31/2021NANo
Construction Laborers' Pension Trust Fund for Southern California4361590560012.9 3.4 0.0 
Varies through 6/30/2026
Green12/31/2022(a)Green12/31/2021NANo
Midwest Operating Engineers Pension Trust Fund3661400970012.7 2.1 1.6 
Varies through 5/31/2027
Green3/31/2023Green3/31/2022(b)NANo
Central Laborers' Pension Fund3760523790012.3 1.3 1.3 
Varies through 4/30/2027
Yellow12/31/2022(b)Yellow12/31/2021(b)ImplementedNo
Employer- Teamsters Local Nos. 175 & 505 Pension Trust Fund5560218500011.8 0.5 0.6 5/31/2026Red12/31/2022(b)Red12/31/2021(b)ImplementedNo
Laborers' National Pension Fund7512808270011.6 0.6 3.8 
Varies through 5/31/2026
Red12/31/2022Red12/31/2021(a)ImplementedNo
Chicago & Vicinity Laborers' District Council Pension Plan3625145140021.4 2.5 0.8 
Varies through 5/31/2026
Green5/31/2022Green5/31/2021NANo
San Diego County Construction Laborers' Pension Trust Fund9560905410011.4 1.5 0.0 6/30/2026Green8/31/2022Green8/31/2021NANo
Laborers' Local Union No. 158 Pension Plan2365803230011.2 1.5 0.7 
Varies through 5/31/2027
Green12/31/2022(a)Green12/31/2021(a)NANo
Laborers' District Council of Western Pennsylvania Pension Fund2561355760010.5 0.5 3.1 
Varies through 5/31/2026
Yellow12/31/2022Yellow12/31/2021ImplementedNo
Minnesota Laborers' Pension Fund4161595990010.5 0.7 5.1 
Varies through 5/31/2026
Green12/31/2022Green12/31/2021NANo
Other funds23.6 23.0 14.5 
Total multiemployer pension plan contributions$118.4 $89.0 $94.0 
(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.
Schedule of Covered Employees and Contributions, Multiemployer Plans 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
20236,806 11,025 $118.4 $59.1 $177.5 
20226,601 7,136 $89.0 $56.3 $145.3 
20212,412 6,979 $94.0 $34.1 $128.1