Related Party Transactions	6 Months Ended
Related Party Transactions	Jun. 30, 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, business development and administrative 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 June 30, 2022 and 2021, such payments to related party entities totaled approximately $7.8 million and $30.7 million, respectively, and for the six month periods ended June 30, 2022 and 2021, totaled approximately $14.6 million and $51.1 million, respectively. Payables associated with such arrangements totaled approximately $0.8 million and $0.6 million as of June 30, 2022 and December 31, 2021, respectively. Revenue from such related party arrangements totaled approximately $1.3 million and $0.9 million for the three month periods ended June 30, 2022 and 2021, respectively, and totaled approximately $5.1 million and $2.1 million, respectively, for the six month periods ended June 30, 2022 and 2021. Related amounts receivable, net, totaled approximately $2.5 million and $0.4 million as of June 30, 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. For the three and six month periods ended June 30, 2022, MasTec paid CCI $0.7 million and $1.7 million, respectively, related to this activity, and for the three and six month periods ended June 30, 2021, paid approximately $5.6 million and $10.7 million, net of rebates, respectively. Amounts payable to CCI totaled approximately $0.8 million as of both June 30, 2022 and December 31, 2021. 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 periods ended June 30, 2022 and 2021, MasTec incurred subcontracting expenses in connection with this arrangement of approximately $0.1 million and $16.8 million, respectively, and for the six month periods ended June 30, 2022 and 2021, incurred subcontracting expenses of approximately $0.1 million and $45.8 million, respectively. As of June 30, 2022 and December 31, 2021, related amounts payable totaled approximately $0.1 million and $0.5 million, respectively. 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 June 30, 2022 and 2021, MasTec paid approximately $0.6 million related to this leasing arrangement, and paid approximately $1.3 million for both the six month periods ended June 30, 2022 and 2021. 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. Payments for other expenses related to the Franchise for the three month periods ended June 30, 2022 and 2021 totaled approximately $0.2 million and $0.1 million, respectively, and totaled approximately $0.3 million and $0.2 million for the six month periods ended June 30, 2022 and 2021. 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 acquired a minority interest, and of which a member of management of a MasTec subsidiary owns the remaining interest. For the three and six month periods ended June 30, 2022, revenue recognized by MasTec under this arrangement totaled approximately $31.9 million and $60.7 million, respectively, and as of June 30, 2022, related amounts receivable totaled approximately $9.0 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 $0.5 million and $0.7 million of management fee expenses related to this arrangement for the three and six month periods ended June 30, 2022, of which $0.3 million was payable as of June 30, 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 June 30, 2022 and 2021, and totaled approximately $0.6 million for both the six month periods ended June 30, 2022 and 2021. As of both June 30, 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 $1.9 million and $0.5 million as of June 30, 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 June 30, 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 June 30, 2022, the Company made no equity contributions to this entity, and for the six month period ended June 30, 2022, the Company made equity contributions of $0.5 million. As of June 30, 2022 and December 31, 2021, the Company’s net investment in this entity was a liability of approximately $1.3 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. Income recognized in connection with these arrangements totaled approximately $0.2 million for both the three month periods ended June 30, 2022 and 2021, and totaled $0.4 million for both the six month periods ended June 30, 2022 and 2021. As of both June 30, 2022 and December 31, 2021, related amounts receivable totaled $0.4 million. Non-controlling interests in entities consolidated by the Company represent ownership interests held by members of management of certain of the Company’s subsidiaries, primarily in the Company’s Oil and Gas segment. In June 2021, the Company acquired an additional 15% of the non-controlling interests in one of these entities from two members of subsidiary management for $6.8 million in cash. 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. The Company paid $0.5 million and $0.7 million, respectively, in both the second quarters of 2022 and 2021 in connection with these agreements. As of June 30, 2022 and December 31, 2021, life insurance assets associated with these agreements totaled approximately $25.2 million and $24.0 million, respectively.