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Segment Disclosures - Segment Earnings (loss) From Operations (Details) - USD ($) $ in Millions | 3 Months Ended | 9 Months Ended
--- | --- | ---
Sep. 27, 2020 | Sep. 29, 2019 | Sep. 27, 2020 | Sep. 29, 2019
Earnings (loss) from Operations |  |  |  |
Gross profit | $ 191.0 | $ 227.7 | $ 603.5 | $ 723.3
SG&A expenses | (193.4) | (210.6) | (591.0) | (666.9)
Earnings (loss) from operations | (2.4) | 17.1 | (103.1) | 68.7
Gain (loss) on investment in Persol Holdings | 16.8 | (39.3) | (31.4) | 35.1
Other income (expense), net | (0.7) | (0.2) | 3.6 | (1.1)
Earnings (loss) before taxes and equity in net earnings (loss) of affiliate | 13.7 | (22.4) | (130.9) | 102.7
Less: Intersegment |  |  |  |
Earnings (loss) from Operations |  |  |  |
Gross profit | 0.0 | 0.0 | 0.0 | 0.0
SG&A expenses | 0.0 | 0.0 | 0.0 | 0.0
Earnings (loss) from operations | 0.0 | 0.0 | 0.0 | 0.0
Corporate |  |  |  |
Earnings (loss) from Operations |  |  |  |
Earnings (loss) from operations | (19.9) | (18.8) | (178.9) | (56.7)
Professional & Industrial | Reporting Segments |  |  |  |
Earnings (loss) from Operations |  |  |  |
Gross profit | 77.1 | 91.8 | 241.1 | 291.6
SG&A expenses | (65.3) | (77.6) | (210.4) | (246.9)
Earnings (loss) from operations | 11.8 | 14.2 | 30.7 | 44.7
Science, Engineering & Technology | Reporting Segments |  |  |  |
Earnings (loss) from Operations |  |  |  |
Gross profit | 50.7 | 58.3 | 156.0 | 171.8
SG&A expenses | (31.3) | (36.0) | (99.1) | (111.4)
Earnings (loss) from operations | 19.4 | 22.3 | 56.9 | 60.4
Education | Reporting Segments |  |  |  |
Earnings (loss) from Operations |  |  |  |
Gross profit | 4.1 | 8.6 | 28.8 | 49.9
SG&A expenses | (11.6) | (13.8) | (37.7) | (41.5)
Earnings (loss) from operations | (7.5) | (5.2) | (8.9) | 8.4
Outsourcing & Consulting | Reporting Segments |  |  |  |
Earnings (loss) from Operations |  |  |  |
Gross profit | 29.1 | 29.5 | 87.1 | 90.7
SG&A expenses | (25.4) | (29.1) | (79.1) | (90.9)
Earnings (loss) from operations | 3.7 | 0.4 | 8.0 | (0.2)
International | Reporting Segments |  |  |  |
Earnings (loss) from Operations |  |  |  |
Gross profit | 30.0 | 39.5 | 90.5 | 119.3
SG&A expenses | (39.9) | (35.3) | (101.4) | (107.2)
Earnings (loss) from operations | $ (9.9) | $ 4.2 | $ (10.9) | $ 12.1

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