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Revenue, Properties and Outsourcing Assets by Geographic Segment (Detail) - USD ($) $ in Millions | 12 Months Ended
--- | ---
Dec. 31, 2015 | Dec. 31, 2014 | Dec. 31, 2013
Revenues from External Customers and Long-Lived Assets [Line Items] |  |  |
Revenues | $ 3,015.1 | $ 3,356.4 | $ 3,456.5
Properties, net | 153.8 | 168.7 | 174.7
Outsourcing assets, net | 182.0 | 150.9 | 115.5
United States |  |  |
Revenues from External Customers and Long-Lived Assets [Line Items] |  |  |
Revenues | 1,454.9 | 1,378.1 | 1,370.6
Properties, net | 96.9 | 111.9 | 112.4
Outsourcing assets, net | 119.4 | 99.7 | 56.2
United Kingdom |  |  |
Revenues from External Customers and Long-Lived Assets [Line Items] |  |  |
Revenues | 375.8 | 435.4 | 414.0
Properties, net | 18.8 | 22.0 | 24.7
Outsourcing assets, net | 36.6 | 25.8 | 28.1
Other International |  |  |
Revenues from External Customers and Long-Lived Assets [Line Items] |  |  |
Revenues | 1,184.4 | 1,542.9 | 1,671.9
Properties, net | 38.1 | 34.8 | 37.6
Outsourcing assets, net | $ 26.0 | $ 25.4 | $ 31.2

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