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SEGMENT INFORMATION - Total Assets by Operating Segments (Details) - USD ($) $ in Millions | Sep. 30, 2020 | Dec. 31, 2019
--- | --- | ---
Segment Reporting Information [Line Items] |  |
Assets | $ 9,249.8 | $ 7,909.0
Operating Segments | U.S. Information Solutions |  |
Segment Reporting Information [Line Items] |  |
Assets | 1,966.7 | 1,922.9
Operating Segments | Workforce Solutions |  |
Segment Reporting Information [Line Items] |  |
Assets | 1,344.5 | 1,338.6
Operating Segments | International |  |
Segment Reporting Information [Line Items] |  |
Assets | 3,161.3 | 2,977.0
Operating Segments | Global Consumer Solutions |  |
Segment Reporting Information [Line Items] |  |
Assets | 294.5 | 275.3
General Corporate |  |
Segment Reporting Information [Line Items] |  |
Assets | $ 2,482.8 | $ 1,395.2

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