v3.26.1
Segment Data - Schedule of Summarized Financial Information by Segment (Details) - USD ($)
$ in Millions
 3 Months Ended 6 Months Ended
Jun. 30, 2026
Jun. 30, 2025
Jun. 30, 2026
Jun. 30, 2025
Segment Reporting [Line Items]        
Revenue $ 2,762.6 $ 2,483.9 $ 5,298.4 $ 4,768.5
Gross contract costs 1,126.7 1,031.4 2,216.4 2,011.1
Direct employment costs 939.5 820.2 1,779.8 1,567.1
Other direct costs 184.4 165.0 369.5 338.7
Indirect and overhead employment costs 195.8 182.2 384.3 356.1
Other indirect and overhead costs 153.5 136.1 301.8 268.0
Other segment items 20.9 12.7 48.3 30.4
Adjusted EBITDA 183.6 161.7 294.9 257.9
Americas        
Segment Reporting [Line Items]        
Revenue 1,997.8 1,804.1 3,826.8 3,492.5
Gross contract costs 882.5 818.2 1,737.9 1,626.8
Direct employment costs 714.7 615.1 1,337.7 1,171.3
Other direct costs 47.5 60.8 101.5 106.3
Indirect and overhead employment costs 126.8 120.5 249.1 238.0
Other indirect and overhead costs 105.0 92.1 201.3 186.1
Other segment items 14.7 12.9 33.0 23.9
Adjusted EBITDA 136.0 110.3 232.3 187.9
EMEA        
Segment Reporting [Line Items]        
Revenue 295.1 259.8 565.2 464.7
Gross contract costs 52.0 37.5 105.0 71.4
Direct employment costs 110.6 99.7 217.7 191.6
Other direct costs 42.0 34.3 81.8 58.4
Indirect and overhead employment costs 33.2 30.0 67.3 58.1
Other indirect and overhead costs 30.9 17.6 62.1 41.7
Other segment items 1.6 (6.5) 5.5 (5.6)
Adjusted EBITDA 28.0 34.2 36.8 37.9
APAC        
Segment Reporting [Line Items]        
Revenue 469.7 420.0 906.4 811.3
Gross contract costs 192.2 175.7 373.5 312.9
Direct employment costs 114.2 105.4 224.4 204.2
Other direct costs 94.9 69.9 186.2 174.0
Indirect and overhead employment costs 35.8 31.7 67.9 60.0
Other indirect and overhead costs 17.6 26.4 38.4 40.2
Other segment items 4.6 6.3 9.8 12.1
Adjusted EBITDA $ 19.6 $ 17.2 $ 25.8 $ 32.1