Related Party Transactions	3 Months Ended
Related Party Transactions	Mar. 31, 2022
Related Party Transactions [Abstract]
Related Party Transactions	Related Party Transactions MasTec purchases, rents and leases equipment and purchases various types of supplies and services used in its business, including ancillary construction services, project-related site restoration and marketing and business development activities, from a number of different vendors on a non-exclusive basis, and from time to time, rents equipment to, sells certain supplies, or performs construction services on behalf of, entities in which members of subsidiary management have ownership or commercial interests. For the three month periods ended March 31, 2022 and 2021, such payments to related party entities totaled approximately $6.8 million and $20.5 million, respectively. Payables associated with such arrangements totaled approximately $0.9 million and $0.6 million as of March 31, 2022 and December 31, 2021, respectively. Revenue from such related party arrangements totaled approximately $3.8 million and $1.1 million for the three month periods ended March 31, 2022 and 2021, respectively. Related amounts receivable, net, totaled approximately $3.3 million and $0.4 million as of March 31, 2022 and December 31, 2021, respectively. The Company rents and leases equipment and purchases certain supplies and servicing from CCI. Juan Carlos Mas, who is the brother of Jorge Mas, Chairman of MasTec’s Board of Directors, and José R. Mas, MasTec’s Chief Executive Officer, serves as the chairman of CCI, and a member of management of a MasTec subsidiary and an entity that is owned by the Mas family are minority owners. MasTec paid CCI $1.0 million and $5.0 million, net of rebates, for the three month periods ended March 31, 2022 and 2021, respectively, related to this activity. Amounts payable to CCI, net of rebates receivable, totaled approximately $0.6 million and $0.8 million as of March 31, 2022 and December 31, 2021, respectively. MasTec has a subcontracting arrangement with an entity for the performance of construction services, the minority owners of which include an entity controlled by Jorge Mas and José R. Mas, along with two members of management of a MasTec subsidiary. For the three month period ended March 31, 2022, subcontracting expenses under these arrangements were de minimis, and for the three month period ended March 31, 2021, MasTec incurred subcontracting expenses of approximately $29.0 million. As of March 31, 2022, related amounts payable were de minimis, and as of December 31, 2021, totaled approximately $0.5 million. MasTec has a leasing arrangement for an aircraft that is owned by an entity that Jorge Mas owns. For both the three month periods ended March 31, 2022 and 2021, MasTec paid approximately $0.6 million related to this leasing arrangement. MasTec has performed construction services on behalf of a professional Miami soccer franchise (the “Franchise”) in which Jorge Mas and José R. Mas are majority owners. Services provided by MasTec have included the construction of a soccer facility and stadium as well as wireless infrastructure services. MasTec may perform additional construction services for the Franchise in the future. For the three month period ended March 31, 2022 and 2021, charges under these arrangements were de minimis. Payments for other expenses related to the Franchise for both the three month periods ended March 31, 2022 and 2021 totaled approximately $0.1 million. In connection with a fourth quarter 2021 acquisition, MasTec has a subcontracting arrangement to perform construction services for an entity, of which José R. Mas bought a minority interest, and of which a member of management of a MasTec subsidiary owns the remaining interest. For the three month period ended March 31, 2022, revenue recognized by MasTec under this arrangement totaled approximately $28.8 million, and as of March 31, 2022, related amounts receivable totaled approximately $13.7 million. There were no amounts receivable as of December 31, 2021. MasTec pays a management fee to this entity in connection with the subcontracting arrangement. MasTec incurred approximately $0.2 million of management fee expense related to this arrangement for the three month period ended March 31, 2022, which amount was payable as of March 31, 2022. MasTec leases employees and provides satellite communication services to a customer in which Jorge Mas and José R. Mas own a majority interest. Charges to this customer under these arrangements totaled approximately $0.3 million for both the three month periods ended March 31, 2022 and 2021. As of both March 31, 2022 and December 31, 2021, related amounts receivable totaled approximately $0.8 million. The Company has advanced amounts on behalf of an entity that was acquired in 2021. Amounts outstanding for such advances, which are expected to be settled under customary terms associated with the related purchase agreement, totaled approximately $1.8 million and $0.5 million as of March 31, 2022 and December 31, 2021, respectively. Additionally, in 2021, the Company advanced amounts to the former owner of an acquired business. There were no remaining amounts outstanding as of March 31, 2022, and as of December 31, 2021, approximately $1.0 million of such advances was outstanding. In addition, the Company, through a 2020 acquisition, has a 25% interest in an entity, under which the acquired business and the 25% owned entity have a subcontracting arrangement. The Company’s interest in this entity, for which post acquisition operating activity is de minimis, is accounted for as an equity method investment. For the three month period ended March 31, 2022, the Company made equity contributions to this entity of approximately $0.5 million. As of March 31, 2022 and December 31, 2021, the Company’s net investment in this entity was a liability of approximately $1.1 million and $1.6 million, respectively, which net amounts each included approximately $2.3 million of accounts receivable, net, less deferred revenue, related to the subcontracting arrangement. Additionally, the Company has certain arrangements with an entity in which members of management have an ownership interest, including a fee arrangement in conjunction with a $15.0 million letter of credit issued by the Company on behalf of this entity. For both the three month periods ended March 31, 2022 and 2021, approximately $0.2 million of income was recognized in connection with these arrangements. As of March 31, 2022 and December 31, 2021, related amounts receivable totaled $0.6 million and $0.4 million, respectively. Split Dollar Agreements MasTec has split dollar life insurance agreements with trusts, for one of which Jorge Mas is a trustee and for the other of which José R. Mas is a trustee. There were no payments made in connection with these agreements in either of the three month periods ended March 31, 2022 or 2021, and life insurance assets associated with these agreements totaled approximately $24.0 million as of both March 31, 2022 and December 31, 2021.