Consolidated Statements of Earnings (Unaudited) - USD ($) shares in Millions, $ in Millions	3 Months Ended		6 Months Ended
	Jul. 04, 2021	Jun. 28, 2020	Jul. 04, 2021	Jun. 28, 2020
Revenue from services	$ 1,258.1	$ 975.3	$ 2,464.0	$ 2,236.4
Cost of services	1,027.1	786.1	2,019.7	1,823.9
Gross profit	231.0	189.2	444.3	412.5
Selling, general and administrative expenses	217.3	178.1	420.0	397.6
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	13.7	11.1	24.3	(100.7)
Gain (loss) on investment in Persol Holdings	6.3	29.6	36.3	(48.2)
Other income (expense), net	(0.3)	2.6	(3.7)	4.3
Earnings (loss) before taxes and equity in net earnings (loss) of affiliate	19.7	43.3	56.9	(144.6)
Income tax expense (benefit)	(2.6)	0.9	7.9	(35.3)
Net earnings (loss) before equity in net earnings (loss) of affiliate	22.3	42.4	49.0	(109.3)
Equity in net earnings (loss) of affiliate	1.7	(1.3)	0.6	(2.8)
Net earnings (loss)	$ 24.0	$ 41.1	$ 49.6	$ (112.1)
Basic earnings (loss) per share (in dollars per share)	$ 0.60	$ 1.04	$ 1.25	$ (2.86)
Diluted earnings (loss) per share (in dollars per share)	$ 0.60	$ 1.04	$ 1.25	$ (2.86)
Average shares outstanding (millions):
Basic (in shares)	39.4	39.3	39.4	39.2
Diluted (in shares)	39.5	39.4	39.5	39.2
Service
Revenue from services	$ 1,258.1	$ 975.3	$ 2,464.0	$ 2,236.4