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Cost Reduction Actions - Additional Information (Detail) $ in Millions | 3 Months Ended | 6 Months Ended | 12 Months Ended |
--- | --- | --- | --- | ---
Jun. 30, 2016 USD ($) Employee | Jun. 30, 2015 USD ($) Employee | Jun. 30, 2016 USD ($) Employee | Jun. 30, 2015 USD ($) Employee | Dec. 31, 2015 USD ($) Employee | Apr. 30, 2015 USD ($)
Restructuring Cost and Reserve [Line Items] |  |  |  |  |  |
Estimated pretax restructuring charges |  |  |  |  |  | $ 300.0
Restructuring charges | $ 10.2 | $ 52.6 | $ 37.1 | $ 52.6 | $ 118.5 |
Severance costs | 6.5 | 42.5 | 28.6 | 42.5 | 78.8 |
Asset impairments and other expenses related to the cost reduction effort |  | 10.1 |  | 10.1 | 39.7 |
Asset impairment charges |  | 3.5 |  | 3.5 | 20.2 |
Other expenses related to the cost reduction effort | 3.7 | 6.6 | 8.5 | 6.6 | 19.5 |
Cost of Revenue | Services |  |  |  |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |  |  |  |
Restructuring charges | 5.1 | 13.3 | 16.6 | 13.3 | 52.3 |
Cost of Revenue | Technology |  |  |  |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |  |  |  |
Restructuring charges |  | 0.1 |  | 0.1 | 0.3 |
Selling, general and administrative expenses |  |  |  |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |  |  |  |
Restructuring charges | 5.5 | 27.5 | 18.8 | 27.5 | 53.5 |
Research and development expenses |  |  |  |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |  |  |  |
Restructuring charges | 0.4 | 11.7 | 1.7 | 11.7 | 12.4 |
United States |  |  |  |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |  |  |  |
Severance costs | $ 1.2 | $ 25.4 | $ 5.4 | $ 25.4 | $ 27.9 |
Number of employees | Employee | 69 | 530 | 244 | 530 | 700 |
Non-US |  |  |  |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |  |  |  |
Severance costs | $ 5.3 | $ 17.1 | $ 23.2 | $ 17.1 | $ 50.9 |
Number of employees | Employee | 262 | 413 | 599 | 413 | 782 |

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