Consolidated Statements of Earnings (Unaudited) - USD ($) shares in Millions, $ in Millions	3 Months Ended		9 Months Ended
	Oct. 01, 2017	Oct. 02, 2016	Oct. 01, 2017	Oct. 02, 2016
Income Statement [Abstract]
Revenue from services	$ 1,328.8	$ 1,247.8	$ 3,952.1	$ 3,972.4
Cost of services	1,098.1	1,032.7	3,261.0	3,294.1
Gross profit	230.7	215.1	691.1	678.3
Selling, general and administrative expenses	212.5	196.3	636.2	634.9
Earnings from operations	18.2	18.8	54.9	43.4
Gain on investment in TS Kelly Asia Pacific	0.0	87.2	0.0	87.2
Other expense, net	(0.4)	(0.4)	(2.5)	(1.3)
Earnings before taxes and equity in net earnings (loss) of affiliate	17.8	105.6	52.4	129.3
Income tax (benefit) expense	(4.1)	24.7	0.1	28.2
Net earnings before equity in net earnings (loss) of affiliate	21.9	80.9	52.3	101.1
Equity in net earnings (loss) of affiliate	1.1	0.0	1.6	(0.1)
Net earnings	$ 23.0	$ 80.9	$ 53.9	$ 101.0
Basic earnings per share (in dollars per share)	$ 0.59	$ 2.08	$ 1.38	$ 2.59
Diluted earnings per share (in dollars per share)	0.58	2.06	1.37	2.58
Dividends per share (in dollars per share)	$ 0.075	$ 0.075	$ 0.225	$ 0.20
Average shares outstanding (millions):
Basic (in shares)	38.3	38.1	38.3	38.0
Diluted (in shares)	38.8	38.4	38.8	38.3