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Segment Disclosures - Segment Revenue From Service (Details) - Service - USD ($) $ in Millions | 3 Months Ended
--- | ---
Apr. 04, 2021 | Mar. 29, 2020
Revenue from Services |  |
Segment revenue from services | $ 1,205.9 | $ 1,261.1
Less: Intersegment revenue |  |
Revenue from Services |  |
Segment revenue from services | (0.2) | (0.1)
Professional & Industrial | Reporting Segments |  |
Revenue from Services |  |
Segment revenue from services | 467.6 | 493.8
Science, Engineering & Technology | Reporting Segments |  |
Revenue from Services |  |
Segment revenue from services | 254.7 | 270.2
Education | Reporting Segments |  |
Revenue from Services |  |
Segment revenue from services | 111.6 | 142.5
Outsourcing & Consulting | Reporting Segments |  |
Revenue from Services |  |
Segment revenue from services | 99.3 | 89.5
International | Reporting Segments |  |
Revenue from Services |  |
Segment revenue from services | $ 272.9 | $ 265.2

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