v3.26.1
Segment Data - Schedule of Segment Data (Details) - USD ($)
$ in Millions
 3 Months Ended 6 Months Ended
Jun. 30, 2026
Jun. 30, 2025
Jun. 30, 2026
Jun. 30, 2025
Segment Reporting Information [Line Items]        
Revenues from services $ 4,860.2 $ 4,519.3 $ 9,370.6 $ 8,609.6
Cost of Services 4,079.9 3,755.6 7,867.3 7,147.6
Selling and Administrative Expenses 668.3 789.0 1,363.0 1,459.1
Corporate expenses (53.9) (55.1) (105.4) (96.2)
Impairment charges 0.0 (88.7) [1] 0.0 (88.7) [2]
Intangible asset amortization expense (7.0) [3] (8.3) [4] (14.0) [5] (16.4) [6]
Operating profit (loss) 112.0 (25.3) 140.3 2.9
Interest and other expenses, net (19.6) (16.5) (32.5) (28.0)
Earnings (loss) before income taxes 92.4 (41.8) 107.8 (25.1)
Intersegment Eliminations [Member]        
Segment Reporting Information [Line Items]        
Revenues from services (5.0) (9.7) (12.1) (17.3)
Cost of Services (4.6) (7.5) (9.7) (14.0)
Selling and Administrative Expenses (0.4) (2.2) (2.4) (3.3)
Operating unit profit 0.0 0.0 0.0 0.0
Reportable subsegments        
Segment Reporting Information [Line Items]        
Revenues from services 4,860.2 4,519.3 9,370.6 8,609.6
Cost of Services 4,079.9 3,755.6 7,867.3 7,147.6
Selling and Administrative Expenses 607.4 636.9 1,243.6 1,257.8
Operating unit profit 172.9 126.8 259.7 204.2
Reportable subsegments | Americas        
Segment Reporting Information [Line Items]        
Revenues from services 1,212.3 1,060.0 2,327.9 2,116.7
Cost of Services 969.4 825.1 1,863.9 1,655.3
Selling and Administrative Expenses 171.0 198.8 373.0 399.8
Operating unit profit 71.9 36.1 91.0 61.6
Reportable subsegments | Southern Europe        
Segment Reporting Information [Line Items]        
Revenues from services 2,308.7 2,149.3 4,410.0 3,983.3
Cost of Services 1,985.5 1,839.0 3,790.0 3,404.9
Selling and Administrative Expenses 248.1 237.0 490.7 454.9
Operating unit profit 75.1 73.3 129.3 123.5
Reportable subsegments | Northern Europe        
Segment Reporting Information [Line Items]        
Revenues from services 825.5 794.4 1,615.6 1,525.2
Cost of Services 695.3 663.7 1,359.8 1,268.1
Selling and Administrative Expenses 128.2 139.7 262.0 284.4
Operating unit profit 2.0 (9.0) (6.2) (27.3)
Reportable subsegments | APME        
Segment Reporting Information [Line Items]        
Revenues from services 518.7 525.3 1,029.2 1,001.7
Cost of Services 434.3 435.3 863.3 833.3
Selling and Administrative Expenses 60.5 63.6 120.3 122.0
Operating unit profit 23.9 26.4 45.6 46.4
Reportable subsegments | Northern Europe and APME        
Segment Reporting Information [Line Items]        
Revenues from services 4,865.2 4,529.0 9,382.7 8,626.9
Cost of Services 4,084.5 3,763.1 7,877.0 7,161.6
Selling and Administrative Expenses 607.8 639.1 1,246.0 1,261.1
Operating unit profit 172.9 126.8 259.7 204.2
Reportable subsegments | United States | Americas        
Segment Reporting Information [Line Items]        
Revenues from services 714.3 [7],[8] 674.1 [9] 1,369.2 [10],[11] 1,362.9 [12]
Cost of Services 540.4 [7],[8] 498.2 [9] 1,038.7 [10],[11] 1,015.2 [12]
Selling and Administrative Expenses 121.1 [7],[8] 156.2 [9] 275.6 [10],[11] 316.7 [12]
Operating unit profit 52.8 [7],[8] 19.7 [9] 54.9 [10],[11] 31.0 [12]
Reportable subsegments | Other Americas | Americas        
Segment Reporting Information [Line Items]        
Revenues from services 498.0 385.9 958.7 753.8
Cost of Services 429.0 326.9 825.2 640.1
Selling and Administrative Expenses 49.9 42.6 97.4 83.1
Operating unit profit 19.1 16.4 36.1 30.6
Reportable subsegments | France | Southern Europe        
Segment Reporting Information [Line Items]        
Revenues from services 1,177.6 1,149.3 2,246.2 2,115.0
Cost of Services 1,016.4 983.0 1,937.2 1,807.9
Selling and Administrative Expenses 132.8 134.0 263.5 253.8
Operating unit profit 28.4 32.3 45.5 53.3
Reportable subsegments | Italy | Southern Europe        
Segment Reporting Information [Line Items]        
Revenues from services 521.9 475.9 996.6 873.7
Cost of Services 440.6 400.4 841.7 734.1
Selling and Administrative Expenses 47.2 43.7 92.1 83.2
Operating unit profit 34.1 31.8 62.8 56.4
Reportable subsegments | Other Southern Europe | Southern Europe        
Segment Reporting Information [Line Items]        
Revenues from services 609.2 524.1 1,167.2 994.6
Cost of Services 528.5 455.6 1,011.1 862.9
Selling and Administrative Expenses 68.1 59.3 135.1 117.9
Operating unit profit $ 12.6 $ 9.2 $ 21.0 $ 13.8
[1] Impairment charges for the three months ended June 30, 2025 consist of a goodwill impairment related to our investments in Switzerland and the United Kingdom and an impairment of an indefinite lived intangible asset in our Switzerland business.
[2] Impairment charges for the six months ended June 30, 2025 consist of a goodwill impairment related to our investments in Switzerland and the United Kingdom and an impairment of an indefinite lived intangible asset in our Switzerland business.
[3] Intangible asset amortization related to acquisitions is excluded from operating costs within the reportable segments and corporate expenses and shown separately.
[4] Intangible asset amortization related to acquisitions is excluded from operating costs within the reportable segments and corporate expenses and shown separately.
[5] Intangible asset amortization related to acquisitions is excluded from operating costs within the reportable segments and corporate expenses and shown separately.
[6] Intangible asset amortization related to acquisitions is excluded from operating costs within the reportable segments and corporate expenses and shown separately.
[7] The United States Selling and Administrative Expenses and OUP included a $30.0 gain on the sale of our Jefferson Wells U.S. business.
[8] The United States revenues above represent revenues from our company-owned branches and franchise fees received from our franchise operations, which were $2.7 for the three months ended June 30, 2026.
[9] The United States revenues above represent revenues from our company-owned branches and franchise fees received from our franchise operations, which were $2.6 for the three months ended June 30, 2025.
[10] The United States Selling and Administrative Expenses and OUP included a $30.0 gain on the sale of our Jefferson Wells U.S. business.
[11] The United States revenues above represent revenues from our company-owned branches and franchise fees received from our franchise operations, which were $5.1 for the six months ended June 30, 2026.
[12] The United States revenues above represent revenues from our company-owned branches and franchise fees received from our franchise operations, which were $4.8 for the six months ended June 30, 2025.