Consolidated Statements of Operations - USD ($) $ in Millions	12 Months Ended
	Dec. 30, 2022	Dec. 31, 2021	Dec. 25, 2020
Revenues:
Total revenues	$ 2,374.3	$ 2,101.6	$ 1,398.6
Cost of revenues:
Total cost revenues	1,909.3	1,671.6	1,106.8
Gross margin	465.0	430.0	291.8
Operating expenses:
Research and development	28.5	24.5	14.8
Sales and marketing	54.4	48.2	25.1
General and administrative	184.3	171.6	130.5
Net loss on divestitures	77.4	0.0	0.0
Total operating expenses	344.6	244.3	170.4
Income from operations	120.4	185.7	121.4
Interest income	0.9	0.4	0.9
Interest expense	(33.9)	(24.2)	(16.9)
Other income (expense), net	0.9	(7.6)	(5.7)
Income before provision for income taxes	88.3	154.3	99.7
Provision for income taxes	37.9	27.9	19.3
Net income	50.4	126.4	80.4
Less: Net income attributable to noncontrolling interests	10.0	6.9	2.8
Net income attributable to UCT	$ 40.4	$ 119.5	$ 77.6
Net income per share attributable to UCT common stockholders:
Basic	$ 0.89	$ 2.75	$ 1.93
Diluted	$ 0.88	$ 2.69	$ 1.89
Shares used in computing net income per share:
Basic	45.2	43.5	40.2
Diluted	45.7	44.4	41.1
Product [Member]
Revenues:
Revenue from contract with customer including assessed tax	$ 2,074.7	$ 1,803.9	$ 1,131.2
Cost of revenues:
Cost of goods and service excluding depreciation depletion and amortization	1,712.3	1,478.7	934.7
Services [Member]
Revenues:
Revenue from contract with customer including assessed tax	299.6	297.7	267.4
Cost of revenues:
Cost of goods and service excluding depreciation depletion and amortization	$ 197.0	$ 192.9	$ 172.1