Condensed Consolidated Statements of Cash Flows - USD ($) $ in Millions	9 Months Ended
	Sep. 30, 2022	Sep. 24, 2021
Cash flows from operating activities:
Net income	$ 22.0	$ 77.6
Adjustments to reconcile net income to net cash provided by operating activities (excluding assets acquired and liabilities assumed):
Depreciation and amortization	29.7	24.0
Amortization of intangible assets	23.1	23.9
Stock-based compensation	14.8	11.5
Amortization of debt issuance costs	2.9	2.4
Gain from insurance proceeds	0.0	(7.3)
Net losss on divestitures	77.4	0.0
Deferred income taxes	0.8	0.8
Change in the fair value of financial instruments	(1.5)	13.0
Others	(0.1)	0.3
Changes in assets and liabilities, net of effects of acquisitions:
Accounts receivable	2.0	(35.4)
Inventories	(45.7)	(70.5)
Prepaid expenses and other current assets	(3.1)	(0.8)
Other non-current assets	(2.1)	(0.3)
Accounts payable	(43.9)	119.5
Accrued compensation and related benefits	2.1	(7.0)
Income taxes payable	(2.5)	1.0
Operating lease assets and liabilities	(1.4)	(0.3)
Other liabilities	11.5	3.6
Net cash provided by operating activities	86.0	170.0
Cash flows from investing activities:
Purchases of property, plant and equipment	(67.9)	(42.7)
Proceeds from sale of equipment, including insurance proceeds	0.3	7.6
Settlement of forward contracts in conjunction with the acquisition of Ham-Let	0.0	(10.4)
Divestiture of subsidiaries	3.4	0.0
Acquisition of business, net of cash acquired	0.0	(344.8)
Net cash used in investing activities	(64.2)	(390.3)
Cash flows from financing activities:
Proceeds from bank borrowings	4.7	394.7
Proceeds from issuance of common stock	0.7	193.1
Principal payments on bank borrowings	(27.8)	(93.9)
Payments of debt issuance costs	(0.7)	(8.9)
Payments of dividends to a joint venture shareholder	(0.2)	(0.1)
Employees' taxes paid upon vesting of restricted stock units	(3.9)	(7.0)
Net cash provided by (used in) financing activities	(27.2)	477.9
Effect of exchange rate changes on cash and cash equivalents	(7.6)	(0.9)
Net increase (decrease) in cash and cash equivalents	(13.0)	256.7
Cash and cash equivalents at beginning of period	466.5	200.3
Cash and cash equivalents at end of period	453.5	457.0
Supplemental cash flow information:
Income taxes paid, net of income tax refunds	27.7	15.1
Interest paid	20.3	14.4
Non-cash investing and financing activities:
Reclassification of common stock purchase obligation liability to noncontrolling interests	0.0	16.4
Property, plant and equipment purchased included in accounts payable and other liabilities	$ 6.7	$ 6.3