Consolidated Statements of Operations - USD ($) shares in Millions, $ in Millions	12 Months Ended
	Dec. 27, 2024	Dec. 29, 2023	Dec. 30, 2022
Revenues:
Total revenues	$ 2,097.6	$ 1,734.5	$ 2,374.3
Cost of revenues:
Total cost revenues	1,741.3	1,457.2	1,909.3
Gross margin	356.3	277.3	465.0
Operating expenses:
Research and development	28.3	28.3	28.5
Sales and marketing	57.3	51.8	54.4
General and administrative	179.5	162.0	184.3
Net loss on divestiture	0.0	0.0	77.4
Total operating expenses	265.1	242.1	344.6
Income from operations	91.2	35.2	120.4
Interest income	4.8	4.1	0.9
Interest expense	(46.5)	(48.8)	(33.9)
Other income (expense), net	17.7	(1.8)	0.9
Income (loss) before provision for income taxes	67.2	(11.3)	88.3
Provision for income tax	32.7	10.9	37.9
Net income (loss)	34.5	(22.2)	50.4
Less: Net income attributable to noncontrolling interests	10.8	8.9	10.0
Net income (loss) attributable to UCT	$ 23.7	$ (31.1)	$ 40.4
Net income (loss) per share attributable to UCT common stockholders:
Basic (in dollars per share)	$ 0.53	$ (0.70)	$ 0.89
Diluted (in dollars per share)	$ 0.52	$ (0.70)	$ 0.88
Shares used in computing net income (loss) per share:
Basic (in shares)	44.9	44.7	45.2
Diluted (in shares)	45.3	44.7	45.7
Product
Revenues:
Total revenues	$ 1,853.7	$ 1,501.6	$ 2,074.7
Cost of revenues:
Total cost revenues	1,569.7	1,290.5	1,712.3
Services
Revenues:
Total revenues	243.9	232.9	299.6
Cost of revenues:
Total cost revenues	$ 171.6	$ 166.7	$ 197.0