v3.26.1
Revenue from Contracts with Customers - Schedule of Revenue. Remaining Performance Obligations, Expected Timing of Satisfaction (Details)
$ in Thousands
Jun. 30, 2026
USD ($)
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]  
Remaining performance obligations $ 17,143,101
United States Electrical Construction And Facilities Services [Member] | UNITED STATES  
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]  
Remaining performance obligations 6,271,919
United States Mechanical Construction And Facilities Services [Member] | UNITED STATES  
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]  
Remaining performance obligations 9,366,637
United States Building Services [Member] | UNITED STATES  
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]  
Remaining performance obligations 1,358,017
United States Industrial Services [Member] | UNITED STATES  
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]  
Remaining performance obligations $ 146,528
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2026-07-01  
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]  
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Period 1 year
Remaining performance obligations $ 13,023,427
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2026-07-01 | United States Electrical Construction And Facilities Services [Member] | UNITED STATES  
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]  
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Period 1 year
Remaining performance obligations $ 4,658,162
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2026-07-01 | United States Mechanical Construction And Facilities Services [Member] | UNITED STATES  
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]  
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Period 1 year
Remaining performance obligations $ 7,005,295
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2026-07-01 | United States Building Services [Member] | UNITED STATES  
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]  
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Period 1 year
Remaining performance obligations $ 1,213,442
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2026-07-01 | United States Industrial Services [Member] | UNITED STATES  
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]  
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Period 1 year
Remaining performance obligations $ 146,528
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2027-07-01  
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]  
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Period 1 year
Remaining performance obligations $ 4,119,674
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2027-07-01 | United States Electrical Construction And Facilities Services [Member] | UNITED STATES  
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]  
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Period 1 year
Remaining performance obligations $ 1,613,757
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2027-07-01 | United States Mechanical Construction And Facilities Services [Member] | UNITED STATES  
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]  
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Period 1 year
Remaining performance obligations $ 2,361,342
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2027-07-01 | United States Building Services [Member] | UNITED STATES  
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]  
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Period 1 year
Remaining performance obligations $ 144,575
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2027-07-01 | United States Industrial Services [Member] | UNITED STATES  
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]  
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Period 1 year
Remaining performance obligations $ 0