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Segment Disclosures - Segment Revenue Per Service (Details) - USD ($) $ in Millions | 3 Months Ended | 12 Months Ended
--- | --- | ---
Jan. 03, 2016 | Sep. 27, 2015 | Jun. 28, 2015 | Mar. 29, 2015 | Dec. 28, 2014 | Sep. 28, 2014 | Jun. 29, 2014 | Mar. 30, 2014 | Jan. 03, 2016 | Dec. 28, 2014 | Dec. 29, 2013
Revenue from Services: |  |  |  |  |  |  |  |  |  |  |  |
Segment revenue for service | $ 1,461.6 | $ 1,351.0 | $ 1,385.0 | $ 1,320.6 | $ 1,425.0 | $ 1,396.4 | $ 1,410.5 | $ 1,330.8 | $ 5,518.2 | [1] | $ 5,562.7 | $ 5,413.1
Reporting Segments | Total Americas Commercial and PT |  |  |  |  |  |  |  |  |  |  |  |
Revenue from Services: |  |  |  |  |  |  |  |  |  |  |  |
Segment revenue for service |  |  |  |  |  |  |  |  | 3,576.2 |  | 3,565.6 | 3,513.4
Reporting Segments | Total EMEA Commercial and PT |  |  |  |  |  |  |  |  |  |  |  |
Revenue from Services: |  |  |  |  |  |  |  |  |  |  |  |
Segment revenue for service |  |  |  |  |  |  |  |  | 945.0 |  | 1,085.0 | 1,057.2
Reporting Segments | Total APAC Commercial and PT |  |  |  |  |  |  |  |  |  |  |  |
Revenue from Services: |  |  |  |  |  |  |  |  |  |  |  |
Segment revenue for service |  |  |  |  |  |  |  |  | 387.7 |  | 392.2 | 382.7
Reporting Segments | Americas Commercial |  |  |  |  |  |  |  |  |  |  |  |
Revenue from Services: |  |  |  |  |  |  |  |  |  |  |  |
Segment revenue for service |  |  |  |  |  |  |  |  | 2,604.3 |  | 2,609.6 | 2,545.6
Reporting Segments | Americas PT |  |  |  |  |  |  |  |  |  |  |  |
Revenue from Services: |  |  |  |  |  |  |  |  |  |  |  |
Segment revenue for service |  |  |  |  |  |  |  |  | 971.9 |  | 956.0 | 967.8
Reporting Segments | EMEA Commercial |  |  |  |  |  |  |  |  |  |  |  |
Revenue from Services: |  |  |  |  |  |  |  |  |  |  |  |
Segment revenue for service |  |  |  |  |  |  |  |  | 773.5 |  | 894.7 | 877.5
Reporting Segments | EMEA PT |  |  |  |  |  |  |  |  |  |  |  |
Revenue from Services: |  |  |  |  |  |  |  |  |  |  |  |
Segment revenue for service |  |  |  |  |  |  |  |  | 171.5 |  | 190.3 | 179.7
Reporting Segments | APAC Commercial |  |  |  |  |  |  |  |  |  |  |  |
Revenue from Services: |  |  |  |  |  |  |  |  |  |  |  |
Segment revenue for service |  |  |  |  |  |  |  |  | 347.2 |  | 351.8 | 344.1
Reporting Segments | APAC PT |  |  |  |  |  |  |  |  |  |  |  |
Revenue from Services: |  |  |  |  |  |  |  |  |  |  |  |
Segment revenue for service |  |  |  |  |  |  |  |  | 40.5 |  | 40.4 | 38.6
Reporting Segments | OCG |  |  |  |  |  |  |  |  |  |  |  |
Revenue from Services: |  |  |  |  |  |  |  |  |  |  |  |
Segment revenue for service |  |  |  |  |  |  |  |  | 673.8 |  | 586.8 | 509.5
Less: Intersegment revenue |  |  |  |  |  |  |  |  |  |  |  |
Revenue from Services: |  |  |  |  |  |  |  |  |  |  |  |
Segment revenue for service |  |  |  |  |  |  |  |  | $ (64.5) |  | $ (66.9) | $ (49.7)
[1] | Fiscal year included 53 weeks.

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