Consolidated Statements of Earnings (Unaudited) - USD ($) shares in Millions, $ in Millions	3 Months Ended		9 Months Ended
	Oct. 03, 2021	Sep. 27, 2020	Oct. 03, 2021	Sep. 27, 2020
Revenue from services	$ 1,195.4	$ 1,038.2	$ 3,659.4	$ 3,274.6
Cost of services	966.5	847.2	2,986.2	2,671.1
Gross profit	228.9	191.0	673.2	603.5
Selling, general and administrative expenses	219.9	193.4	639.9	591.0
Goodwill impairment charge	0.0	0.0	0.0	147.7
Gain on sale of assets	0.0	0.0	0.0	(32.1)
Earnings (loss) from operations	9.0	(2.4)	33.3	(103.1)
Gain (loss) on investment in Persol Holdings	35.5	16.8	71.8	(31.4)
Other income (expense), net	(0.3)	(0.7)	(4.0)	3.6
Earnings (loss) before taxes and equity in net earnings (loss) of affiliate	44.2	13.7	101.1	(130.9)
Income tax expense (benefit)	11.1	(1.2)	19.0	(36.5)
Net earnings (loss) before equity in net earnings (loss) of affiliate	33.1	14.9	82.1	(94.4)
Equity in net earnings (loss) of affiliate	1.7	1.8	2.3	(1.0)
Net earnings (loss)	$ 34.8	$ 16.7	$ 84.4	$ (95.4)
Basic earnings (loss) per share (in dollars per share)	$ 0.87	$ 0.42	$ 2.12	$ (2.43)
Diluted earnings (loss) per share (in dollars per share)	$ 0.87	$ 0.42	$ 2.12	$ (2.43)
Average shares outstanding (millions):
Basic (in shares)	39.4	39.3	39.4	39.3
Diluted (in shares)	39.5	39.4	39.5	39.3
Service
Revenue from services	$ 1,195.4	$ 1,038.2	$ 3,659.4	$ 3,274.6