SEGMENT INFORMATION (Operating Revenue and Operating Income by Operating Segment) (Detail) (USD $) In Millions, unless otherwise specified	3 Months Ended
	Mar. 31, 2014	Mar. 31, 2013
Segment Reporting Information [Line Items]
Operating revenue	$ 584.5	$ 566.5
Operating income	151.9	149.0
U.S. Consumer Information Solutions [Member]
Segment Reporting Information [Line Items]
Operating revenue	243.9	245.1
Operating income	94.8	91.9
International [Member]
Segment Reporting Information [Line Items]
Operating revenue	143.9	123.7
Operating income	29.4	34.7
Workforce Solutions [Member]
Segment Reporting Information [Line Items]
Operating revenue	119.7	123.7
Operating income	38.7	37.4
North America Personal Solutions [Member]
Segment Reporting Information [Line Items]
Operating revenue	54.1	51.1
Operating income	15.3	14.5
North America Commercial Solutions [Member]
Segment Reporting Information [Line Items]
Operating revenue	22.9	22.9
Operating income	4.4	4.9
General Corporate Expenses [Member]
Segment Reporting Information [Line Items]
Operating income	$ (30.7)	$ (34.4)