Summary of Operations by Segment (Detail) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2016	Mar. 31, 2015
Segment Reporting Information [Line Items]
Revenue	$ 666.8	$ 721.2
Operating income (loss)	(27.6)	(30.0)
Operating Segments
Segment Reporting Information [Line Items]
Revenue	666.8	721.2
Operating income (loss)	18.0	(3.9)
Corporate
Segment Reporting Information [Line Items]
Operating income (loss)	(45.6)	(26.1)
Corporate | Intersegment Eliminations
Segment Reporting Information [Line Items]
Revenue	(5.6)	(6.7)
Corporate | Operating Segments
Segment Reporting Information [Line Items]
Revenue	(5.6)	(6.7)
Services
Segment Reporting Information [Line Items]
Revenue	595.1	639.0
Operating income (loss)	4.0	(8.5)
Services | Operating Segments
Segment Reporting Information [Line Items]
Revenue	595.1	639.0
Technology
Segment Reporting Information [Line Items]
Revenue	71.7	82.2
Operating income (loss)	14.0	4.6
Technology | Intersegment Eliminations
Segment Reporting Information [Line Items]
Revenue	5.6	6.7
Technology | Operating Segments
Segment Reporting Information [Line Items]
Revenue	$ 77.3	$ 88.9