Quarterly report pursuant to Section 13 or 15(d)

SEGMENT INFORMATION - Operating Revenue and Operating Income by Operating Segment (Details)

v3.8.0.1
SEGMENT INFORMATION - Operating Revenue and Operating Income by Operating Segment (Details) - USD ($)
$ in Millions
 3 Months Ended
Mar. 31, 2018
Mar. 31, 2017
Segment Reporting Information [Line Items]    
Operating revenue $ 865.7 $ 832.2
Operating income 144.2 218.6
General Corporate Expense    
Segment Reporting Information [Line Items]    
Operating income (123.6) (61.2)
U.S. Information Solutions | Operating Segments    
Segment Reporting Information [Line Items]    
Operating revenue 306.9 310.1
Operating income 110.9 129.7
International | Operating Segments    
Segment Reporting Information [Line Items]    
Operating revenue 244.5 216.2
Operating income 36.7 29.8
Workforce Solutions | Operating Segments    
Segment Reporting Information [Line Items]    
Operating revenue 211.1 200.0
Operating income 90.1 89.5
Global Consumer Solutions | Operating Segments    
Segment Reporting Information [Line Items]    
Operating revenue 103.2 105.9
Operating income $ 30.1 $ 30.8