Consolidated Statements of Operations - USD ($) shares in Millions, $ in Millions	12 Months Ended
	Dec. 26, 2025	Dec. 27, 2024	Dec. 29, 2023
Revenues:
Total revenues	$ 2,054.0	$ 2,097.6	$ 1,734.5
Cost of revenues:
Total cost revenues	1,731.1	1,741.3	1,457.2
Gross margin	322.9	356.3	277.3
Operating expenses:
Research and development	32.0	28.3	28.3
Sales and marketing	61.2	57.3	51.8
General and administrative	186.0	179.5	162.0
Impairment of goodwill	151.1	0.0	0.0
Total operating expenses	430.3	265.1	242.1
Income (loss) from operations	(107.4)	91.2	35.2
Interest income	3.9	4.8	4.1
Interest expense	(38.3)	(46.5)	(48.8)
Other income (expense), net	(3.9)	17.7	(1.8)
Income (loss) before provision for income taxes	(145.7)	67.2	(11.3)
Provision for income tax	25.9	32.7	10.9
Net income (loss)	(171.6)	34.5	(22.2)
Less: Net income attributable to noncontrolling interests	9.6	10.8	8.9
Net income (loss) attributable to UCT	$ (181.2)	$ 23.7	$ (31.1)
Net income (loss) per share attributable to UCT common stockholders:
Basic (in dollars per share)	$ (4.00)	$ 0.53	$ (0.70)
Diluted (in dollars per share)	$ (4.00)	$ 0.52	$ (0.70)
Shares used in computing net income (loss) per share:
Basic (in shares)	45.3	44.9	44.7
Diluted (in shares)	45.3	45.3	44.7
Products
Revenues:
Total revenues	$ 1,799.3	$ 1,853.7	$ 1,501.6
Cost of revenues:
Total cost revenues	1,547.0	1,569.7	1,290.5
Services
Revenues:
Total revenues	254.7	243.9	232.9
Cost of revenues:
Total cost revenues	$ 184.1	$ 171.6	$ 166.7