Condensed Consolidated Statements of Operations - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2022	Sep. 24, 2021	Sep. 30, 2022	Sep. 24, 2021
Revenues:
Total revenues	$ 635.0	$ 553.7	$ 1,807.9	$ 1,486.5
Cost of revenues:
Total cost of revenues	510.6	439.6	1,451.3	1,185.6
Gross profit	124.4	114.1	356.6	300.9
Operating expenses:
Research and development	7.4	6.5	21.5	16.8
Sales and marketing	13.5	13.8	41.2	34.1
General and administrative	46.4	43.2	139.9	127.1
Net losss on divestitures	20.8	0.0	77.4	0.0
Total operating expenses	88.1	63.5	280.0	178.0
Income from operations	36.3	50.6	76.6	122.9
Interest income	0.2	0.1	0.4	0.3
Interest expense	(9.4)	(6.9)	(23.1)	(17.6)
Other income (expense), net	(2.1)	(1.4)	(2.5)	(6.4)
Income before provision for income taxes	25.0	42.4	51.4	99.2
Provision for income taxes	12.1	8.4	29.4	21.6
Net income	12.9	34.0	22.0	77.6
Less: Net income (loss) attributable to noncontrolling interests	3.2	2.1	9.5	3.6
Net income attributable to UCT	$ 9.7	$ 31.9	$ 12.5	$ 74.0
Net income per share attributable to UCT common stockholders:
Basic	$ 0.21	$ 0.71	$ 0.28	$ 1.73
Diluted	$ 0.21	$ 0.70	$ 0.28	$ 1.69
Shares used in computing net income per share:
Basic	45.4	44.8	45.2	42.8
Diluted	45.6	45.4	45.7	43.7
Product [Member]
Revenues:
Revenue from contract with customer including assessed tax	$ 556.3	$ 482.0	$ 1,575.2	$ 1,270.1
Cost of revenues:
Cost of goods and service excluding depreciation depletion and amortization	459.3	393.4	1,299.9	1,044.9
Services [Member]
Revenues:
Revenue from contract with customer including assessed tax	78.7	71.7	232.7	216.4
Cost of revenues:
Cost of goods and service excluding depreciation depletion and amortization	$ 51.3	$ 46.2	$ 151.4	$ 140.7