Annual report pursuant to Section 13 and 15(d)

SEGMENT INFORMATION - Segment Information (Details)

v3.22.4
SEGMENT INFORMATION - Segment Information (Details) - USD ($)
$ in Millions
 12 Months Ended
Dec. 31, 2022
Dec. 31, 2021
Dec. 31, 2020
Segment Reporting Disclosure [Line Items]      
Operating revenue $ 5,122.2 $ 4,923.9 $ 4,127.5
Operating income 1,056.0 1,138.0 676.6
Total assets 11,547.9 11,040.9  
Depreciation and amortization expense 560.1 480.4 391.0
Capital expenditures 617.4 490.5 430.7
General Corporate Expense      
Segment Reporting Disclosure [Line Items]      
Operating income (499.1) (556.4) (618.3)
Total assets 993.2 789.7  
Depreciation and amortization expense 74.5 74.3 65.5
Capital expenditures 233.4 200.3 161.8
Total Workforce Solutions      
Segment Reporting Disclosure [Line Items]      
Operating revenue 2,325.4 2,035.4 1,461.7
Total Workforce Solutions | Operating Segments      
Segment Reporting Disclosure [Line Items]      
Operating revenue 2,325.4 2,035.4 1,461.7
Operating income 1,006.0 1,000.7 703.9
Total assets 4,156.5 3,888.3  
Depreciation and amortization expense 162.2 106.5 71.9
Capital expenditures 113.5 73.5 74.6
U.S. Information Solutions | Operating Segments      
Segment Reporting Disclosure [Line Items]      
Operating revenue 1,657.7 1,786.7 1,711.2
Operating income 402.1 551.8 515.3
Total assets 3,291.4 3,091.4  
Depreciation and amortization expense 191.4 158.5 120.2
Capital expenditures 125.7 92.9 126.0
International      
Segment Reporting Disclosure [Line Items]      
Operating revenue 1,139.1 1,101.8 954.6
International | Operating Segments      
Segment Reporting Disclosure [Line Items]      
Operating revenue 1,139.1 1,101.8 954.6
Operating income 147.0 141.9 75.7
Total assets 3,106.8 3,271.5  
Depreciation and amortization expense 132.0 141.1 133.4
Capital expenditures $ 144.8 $ 123.8 $ 68.3