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Summary of Operations by Segment (Detail) - USD ($) $ in Millions | 3 Months Ended | 6 Months Ended
--- | --- | ---
Jun. 30, 2016 | Jun. 30, 2015 | Jun. 30, 2016 | Jun. 30, 2015
Segment Reporting Information [Line Items] |  |  |  |
Revenue | $ 748.9 | $ 764.8 | $ 1,415.7 | $ 1,486.0
Operating income (loss) | 49.5 | (49.5) | 21.9 | (79.5)
Services |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Revenue | 613.8 | 661.5 | 1,208.9 | 1,300.5
Operating income (loss) | 12.7 | 14.3 | 16.7 | 5.8
Technology |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Revenue | 135.1 | 103.3 | 206.8 | 185.5
Operating income (loss) | 67.6 | 19.5 | 81.7 | 24.1
Intersegment Eliminations |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Revenue | (5.9) | (22.0) | (11.5) | (28.7)
Intersegment Eliminations | Services |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Revenue | 0.0 | 0.1 | 0.0 | 0.1
Intersegment Eliminations | Technology |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Revenue | 5.9 | 21.9 | 11.5 | 28.6
Operating Segments |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Operating income (loss) | 80.3 | 33.8 | 98.4 | 29.9
Operating Segments | Services |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Revenue | 613.8 | 661.6 | 1,208.9 | 1,300.6
Operating Segments | Technology |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Revenue | 141.0 | 125.2 | 218.3 | 214.1
Corporate |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Revenue | (5.9) | (22.0) | (11.5) | (28.7)
Operating income (loss) | $ (30.8) | $ (83.3) | $ (76.5) | $ (109.4)

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