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Segment Disclosures - Segment Revenue From Service (Details) - Service - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jul. 01, 2018	Jul. 02, 2017	Jul. 01, 2018	Jul. 02, 2017
Revenue from Services
Segment revenue from services	$ 1,386.9	$ 1,333.6	$ 2,756.8	$ 2,623.3
Less: Intersegment revenue
Revenue from Services
Segment revenue from services	(4.4)	(4.3)	(9.3)	(8.6)
Americas Staffing | Reporting Segments
Revenue from Services
Segment revenue from services	604.0	575.6	1,208.3	1,148.7
Global Talent Solutions | Reporting Segments
Revenue from Services
Segment revenue from services	500.7	505.5	986.5	992.8
International Staffing | Reporting Segments
Revenue from Services
Segment revenue from services	$ 286.6	$ 256.8	$ 571.3	$ 490.4

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- Definition

Amount of revenue recognized from goods sold, services rendered, insurance premiums, or other activities that constitute an earning process. Includes, but is not limited to, investment and interest income before deduction of interest expense when recognized as a component of revenue, and sales and trading gain (loss).

+ References

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-Publisher FASB
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-Publisher FASB
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