SEGMENT INFORMATION (Segment Information) (Detail) - USD ($) $ in Millions |
3 Months Ended | 12 Months Ended | |||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|
Dec. 31, 2015 |
Sep. 30, 2015 |
Jun. 30, 2015 |
Mar. 31, 2015 |
Dec. 31, 2014 |
Sep. 30, 2014 |
Jun. 30, 2014 |
Mar. 31, 2014 |
Dec. 31, 2015 |
Dec. 31, 2014 |
Dec. 31, 2013 |
|
| Segment Reporting Disclosure [Line Items] | |||||||||||
| Operating revenue | $ 666.3 | $ 667.4 | $ 678.1 | $ 651.8 | $ 624.6 | $ 613.4 | $ 613.9 | $ 584.5 | $ 2,663.6 | $ 2,436.4 | $ 2,303.9 |
| Operating income | 176.9 | $ 174.3 | $ 188.5 | $ 154.2 | 165.2 | $ 153.7 | $ 167.4 | $ 151.9 | 693.9 | 638.2 | 611.2 |
| Total Assets | 4,509.0 | 4,661.0 | 4,509.0 | 4,661.0 | |||||||
| Depreciation and amortization | 198.0 | 201.8 | 189.6 | ||||||||
| Capital expenditures | 146.2 | 86.4 | 83.3 | ||||||||
| Expenditures to Acquire Productive Assets | 150.7 | ||||||||||
| U.S. Information Solutions | |||||||||||
| Segment Reporting Disclosure [Line Items] | |||||||||||
| Operating revenue | 1,171.3 | 1,079.9 | 1,054.5 | ||||||||
| Operating income | 491.2 | 421.0 | 401.3 | ||||||||
| Total Assets | 1,869.6 | 1,931.3 | 1,869.6 | 1,931.3 | |||||||
| Depreciation and amortization | 83.3 | 86.7 | 88.8 | ||||||||
| Capital expenditures | 21.9 | 16.6 | 16.7 | ||||||||
| International | |||||||||||
| Segment Reporting Disclosure [Line Items] | |||||||||||
| Operating revenue | 568.5 | 572.2 | 497.8 | ||||||||
| Operating income | 113.5 | 121.0 | 145.3 | ||||||||
| Total Assets | 830.2 | 965.3 | 830.2 | 965.3 | |||||||
| Depreciation and amortization | 40.1 | 44.2 | 24.1 | ||||||||
| Capital expenditures | 25.7 | 15.2 | 19.7 | ||||||||
| Workforce Solutions | |||||||||||
| Segment Reporting Disclosure [Line Items] | |||||||||||
| Operating revenue | 577.7 | 490.1 | 474.1 | ||||||||
| Operating income | 218.8 | 160.7 | 142.6 | ||||||||
| Total Assets | 1,268.5 | 1,271.3 | 1,268.5 | 1,271.3 | |||||||
| Depreciation and amortization | 42.0 | 42.6 | 51.7 | ||||||||
| Capital expenditures | 22.1 | 13.1 | 14.6 | ||||||||
| Personal Solutions | |||||||||||
| Segment Reporting Disclosure [Line Items] | |||||||||||
| Operating revenue | 346.1 | 294.2 | 277.5 | ||||||||
| Operating income | 95.2 | 93.4 | 79.3 | ||||||||
| Total Assets | 197.9 | 194.9 | 197.9 | 194.9 | |||||||
| Depreciation and amortization | 9.4 | 8.2 | 7.5 | ||||||||
| Capital expenditures | 11.2 | 9.2 | 6.9 | ||||||||
| General Corporate Expense | |||||||||||
| Segment Reporting Disclosure [Line Items] | |||||||||||
| Operating income | (224.8) | (157.9) | (157.3) | ||||||||
| Total Assets | $ 342.8 | $ 298.2 | 342.8 | 298.2 | |||||||
| Depreciation and amortization | 23.2 | 20.1 | 17.5 | ||||||||
| Capital expenditures | $ 69.8 | $ 32.3 | $ 25.4 | ||||||||