v3.26.1
Segment Reporting (Details)
$ in Millions
3 Months Ended 6 Months Ended
Jun. 30, 2026
USD ($)
Jun. 30, 2025
USD ($)
Jun. 30, 2026
USD ($)
Jun. 30, 2025
USD ($)
Segment Reporting [Line Items]        
Number of Reportable Segments     1  
Revenue $ 6,562.5 $ 4,015.6 $ 12,805.4 $ 7,706.0
Salary and service costs 4,713.3 2,932.6 9,352.9 5,678.9
Occupancy and other costs 504.4 325.9 1,031.7 640.5
Segment cost of services 5,264.7 3,347.3 10,470.0 6,408.2
Selling, general and administrative expenses 209.0 170.4 433.5 288.3
Depreciation and amortization 166.3 58.7 333.2 117.7
Severance and repositioning costs 47.0 88.8 51.1 88.8
Loss on assets held for sale and dispositions 0.0 0.0 34.3 0.0
Integration and acquisition related costs 40.1 66.0 99.5 99.8
Total Operating Expenses 5,640.0 3,576.4 11,236.7 6,814.2
Operating Income 922.5 439.2 1,568.7 891.8
Interest Expense 123.2 62.6 242.2 121.7
Interest Income 29.9 21.9 76.9 51.6
Income (Loss) from Continuing Operations before Equity Method Investments, Income Taxes, Noncontrolling Interest 829.2 398.5 1,403.4 821.7
Operating Segments | Reportable Segment        
Segment Reporting [Line Items]        
Revenue 6,562.5 4,015.6 12,805.4 7,706.0
Salary and related costs 2,966.6 1,827.8 6,028.2 3,608.3
Third-party service costs 1,522.4 918.4 2,888.1 1,715.2
Third-party incidental costs 224.3 186.4 436.6 355.4
Salary and service costs 4,713.3 2,932.6 9,352.9 5,678.9
Occupancy and other costs 504.4 325.9 1,031.7 640.5
Segment cost of services 5,217.7 3,258.5 10,384.6 6,319.4
Selling, general and administrative expenses 168.9 104.4 334.0 188.5
Depreciation and amortization 166.3 58.7 333.2 117.7
Total Operating Expenses 5,552.9 3,421.6 11,051.8 6,625.6
Operating Income 1,009.6 594.0 1,753.6 1,080.4
Segment Reporting, Reconciling Item        
Segment Reporting [Line Items]        
Severance and repositioning costs 47.0 88.8 51.1 88.8
Loss on assets held for sale and dispositions 0.0 0.0 34.3 0.0
Integration and acquisition related costs $ 40.1 $ 66.0 $ 99.5 $ 99.8