Investment in Equity Affiliate (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Oct. 02, 2016	Sep. 27, 2015	Oct. 02, 2016	Sep. 27, 2015	Jul. 04, 2016	Jan. 03, 2016
Schedule of Equity Method Investments [Line Items]
Investment in equity affiliate	$ 113.6		$ 113.6			$ 9.4
Post-close cash true-up adjustment from Temp Holdings	4.5		4.5
Gain on investment in TS Kelly Asia Pacific	87.2	$ 0.0	87.2	$ 0.0
TS Kelly Asia Pacific [Member]
Schedule of Equity Method Investments [Line Items]
Equity Method Investment, Ownership Percentage					49.00%
Proceeds from investment in TS Kelly Asia Pacific equity affiliate	36.5
Investment in equity affiliate	104.2		104.2
Gain on investment in TS Kelly Asia Pacific	87.2
Tax expense on gain on investment in TS Kelly Asia Pacific equity affiliate	23.5
Deconsolidated goodwill	1.9		1.9
Due to TS Kelly Asia Pacific	$ 2.1		$ 2.1