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Segment Information - Summary of Operations by Segment (Detail) - USD ($) $ in Millions | 3 Months Ended
--- | ---
Mar. 31, 2017 | Mar. 31, 2016
Segment Reporting Information [Line Items] |  |
Revenue | $ 664.5 | $ 666.8
Operating income (loss) | (2.7) | (27.6)
Services |  |
Segment Reporting Information [Line Items] |  |
Revenue | 585.3 | 595.1
Operating income (loss) | 27.3 | 4.0
Technology |  |
Segment Reporting Information [Line Items] |  |
Revenue | 79.2 | 71.7
Operating income (loss) | 13.0 | 14.0
Intersegment |  |
Segment Reporting Information [Line Items] |  |
Revenue | (5.3) | (5.6)
Intersegment | Services |  |
Segment Reporting Information [Line Items] |  |
Revenue | 0.0 | 0.0
Intersegment | Technology |  |
Segment Reporting Information [Line Items] |  |
Revenue | 5.3 | 5.6
Operating Segments |  |
Segment Reporting Information [Line Items] |  |
Operating income (loss) | 40.3 | 18.0
Operating Segments | Services |  |
Segment Reporting Information [Line Items] |  |
Revenue | 585.3 | 595.1
Operating Segments | Technology |  |
Segment Reporting Information [Line Items] |  |
Revenue | 84.5 | 77.3
Corporate |  |
Segment Reporting Information [Line Items] |  |
Revenue | (5.3) | (5.6)
Operating income (loss) | $ (43.0) | $ (45.6)

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