v3.26.3
Segment Data - Schedule of Segment Data (Details) - USD ($)
$ in Millions
 3 Months Ended 9 Months Ended
Sep. 30, 2026
Sep. 30, 2025
Sep. 30, 2026
Sep. 30, 2025
Segment Reporting Information [Line Items]        
Revenue $ 4,840.0 $ 4,634.4 $ 14,210.6 $ 13,244.0
Cost of Services 4,072.7 3,865.5 11,940.0 11,013.1
Selling and Administrative Expenses 685.0 702.3 2,048.0 2,161.4
Corporate expenses (54.1) (40.9) (159.5) (137.1)
Impairment charges 0.0 0.0 0.0 (88.7) [1]
Intangible asset amortization expense (7.0) [2] (7.9) [3] (21.0) [4] (24.3) [5]
Operating profit 82.3 66.6 222.6 69.5
Interest and other expenses, net (14.3) (13.7) (46.8) (41.7)
Earnings before income taxes 68.0 52.9 175.8 27.8
Intersegment Eliminations [Member]        
Segment Reporting Information [Line Items]        
Revenue (10.1) (7.1) (22.2) (24.4)
Cost of Services (6.6) (6.3) (16.5) (20.3)
Selling and Administrative Expenses (3.5) (0.8) (5.7) (4.1)
OUP 0.0 0.0 0.0 0.0
Reportable subsegments        
Segment Reporting Information [Line Items]        
Revenue 4,840.0 4,634.4 14,210.6 13,244.0
Cost of Services 4,072.7 3,865.5 11,940.0 11,013.1
Selling and Administrative Expenses 623.9 653.5 1,867.5 1,911.3
OUP 143.4 115.4 403.1 319.6
Reportable subsegments | Americas        
Segment Reporting Information [Line Items]        
Revenue 1,246.7 1,098.7 3,574.6 3,215.4
Cost of Services 998.2 857.4 2,862.2 2,512.8
Selling and Administrative Expenses 201.1 203.4 574.0 603.1
OUP 47.4 37.9 138.4 99.5
Reportable subsegments | Southern Europe        
Segment Reporting Information [Line Items]        
Revenue 2,227.9 2,205.5 6,637.9 6,188.8
Cost of Services 1,921.3 1,896.8 5,711.3 5,301.6
Selling and Administrative Expenses 242.0 243.1 732.7 698.1
OUP 64.6 65.6 193.9 189.1
Reportable subsegments | Northern Europe        
Segment Reporting Information [Line Items]        
Revenue 860.6 816.8 2,476.2 2,342.0
Cost of Services 726.8 684.3 2,086.6 1,952.4
Selling and Administrative Expenses 126.3 147.4 388.3 431.8
OUP 7.5 (14.9) 1.3 (42.2)
Reportable subsegments | APME        
Segment Reporting Information [Line Items]        
Revenue 514.9 520.5 1,544.1 1,522.2
Cost of Services 433.0 433.3 1,296.4 1,266.6
Selling and Administrative Expenses 58.0 60.4 178.2 182.4
OUP 23.9 26.8 69.5 73.2
Reportable subsegments | Northern Europe and APME        
Segment Reporting Information [Line Items]        
Revenue 4,850.1 4,641.5 14,232.8 13,268.4
Cost of Services 4,079.3 3,871.8 11,956.5 11,033.4
Selling and Administrative Expenses 627.4 654.3 1,873.2 1,915.4
OUP 143.4 115.4 403.1 319.6
Reportable subsegments | United States | Americas        
Segment Reporting Information [Line Items]        
Revenue 728.8 [6] 690.8 [7] 2,098.0 [8],[9] 2,053.7 [10]
Cost of Services 553.2 [6] 515.7 [7] 1,592.0 [8],[9] 1,530.9 [10]
Selling and Administrative Expenses 151.3 [6] 154.5 [7] 426.8 [8],[9] 471.2 [10]
OUP 24.3 [6] 20.6 [7] 79.2 [8],[9] 51.6 [10]
Reportable subsegments | Other Americas | Americas        
Segment Reporting Information [Line Items]        
Revenue 517.9 407.9 1,476.6 1,161.7
Cost of Services 445.0 341.7 1,270.2 981.9
Selling and Administrative Expenses 49.8 48.9 147.2 131.9
OUP 23.1 17.3 59.2 47.9
Reportable subsegments | France | Southern Europe        
Segment Reporting Information [Line Items]        
Revenue 1,132.9 1,173.5 3,379.1 3,288.5
Cost of Services 980.3 1,010.5 2,917.4 2,818.4
Selling and Administrative Expenses 130.2 132.4 393.8 386.2
OUP 22.4 30.6 67.9 83.9
Reportable subsegments | Italy | Southern Europe        
Segment Reporting Information [Line Items]        
Revenue 483.1 462.5 1,479.7 1,336.2
Cost of Services 410.8 390.6 1,252.5 1,124.7
Selling and Administrative Expenses 44.9 45.3 137.0 128.5
OUP 27.4 26.6 90.2 83.0
Reportable subsegments | Other Southern Europe | Southern Europe        
Segment Reporting Information [Line Items]        
Revenue 611.9 569.5 1,779.1 1,564.1
Cost of Services 530.2 495.7 1,541.4 1,358.5
Selling and Administrative Expenses 66.9 65.4 201.9 183.4
OUP $ 14.8 $ 8.4 $ 35.8 $ 22.2
[1] Impairment charges for the nine months ended September 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] Intangible asset amortization related to acquisitions is excluded from operating costs within the reportable segments and corporate expenses and shown separately.
[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] The United States revenues above represent revenues from our company-owned branches and franchise fees received from our franchise operations, which were $2.4 for the three months ended September 30, 2026.
[7] 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 September 30, 2025.
[8] The United States Selling and Administrative Expenses and OUP included a $28.3 gain on the sale of our Jefferson Wells U.S. business.
[9] The United States revenues above represent revenues from our company-owned branches and franchise fees received from our franchise operations, which were $7.5 for the nine months ended September 30, 2026.
[10] The United States revenues above represent revenues from our company-owned branches and franchise fees received from our franchise operations, which were $7.5 for the nine months ended September 30, 2025.