Consolidated Statements of Earnings - USD ($) shares in Millions, $ in Millions	12 Months Ended
	Dec. 28, 2025	Dec. 29, 2024	Dec. 31, 2023
Income Statement [Abstract]
Revenue from services	$ 4,250.9	$ 4,331.8	$ 4,835.7
Cost of services	3,397.9	3,449.2	3,874.3
Gross profit	853.0	882.6	961.4
Selling, general and administrative expenses	825.9	818.4	934.7
Goodwill impairment charge	102.0	72.8	0.0
Asset impairment charge	0.0	13.5	2.4
Gain on sale of assets	(1.0)	(5.4)	0.0
Gain on sale of EMEA staffing operations	(4.1)	(1.6)	0.0
Earnings (loss) from operations	(69.8)	(15.1)	24.3
Other income (expense), net	(9.0)	(6.8)	0.6
Earnings (loss) before taxes	(78.8)	(21.9)	24.9
Income tax expense (benefit)	175.3	(21.3)	(11.5)
Net earnings (loss)	$ (254.1)	$ (0.6)	$ 36.4
Basic earnings (loss) per share (in dollars per share)	$ (7.24)	$ (0.02)	$ 0.99
Diluted earnings (loss) per share (in dollars per share)	$ (7.24)	$ (0.02)	$ 0.98
Average shares outstanding:
Basic (in shares)	35.1	35.5	35.9
Diluted (in shares)	35.1	35.5	36.3