CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Millions	6 Months Ended
	Dec. 31, 2022	Jan. 01, 2022
OPERATING ACTIVITIES:
Net income (loss)	$ (32.1)	$ 138.2
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation expense	50.9	41.0
Stock-based compensation	83.2	52.1
Amortization of acquired intangibles	68.3	42.9
(Gain) loss on sales and dispositions of property, plant and equipment	7.2	(5.0)
Amortization of debt discount and debt issuance costs	11.9	30.8
Amortization of inventory fair value adjustment in connection with acquisition	14.2	0.0
Other non-cash items	1.0	6.6
Changes in operating assets and liabilities:
Accounts receivable	(1.5)	(26.4)
Inventories	(36.4)	(11.0)
Operating lease right-of-use assets, net	7.9	(7.7)
Prepayments and other current and non-currents assets	(13.9)	(7.3)
Income taxes, net	(14.8)	(5.4)
Accounts payable	(45.0)	4.8
Accrued payroll and related expenses	(15.0)	(4.0)
Operating lease liabilities	(7.3)	8.7
Accrued expenses and other current and non-current liabilities	37.1	10.1
Net cash provided by operating activities	115.7	268.4
INVESTING ACTIVITIES:
Payments for acquisition of property, plant and equipment	(62.8)	(44.0)
Acquisition of businesses, net of cash acquired	(861.6)	0.0
Purchases of short-term investments	(327.8)	(648.0)
Proceeds from maturities and sales of short-term investments	501.0	340.2
Proceeds from the sales of property, plant and equipment	0.1	6.0
Net cash used in investing activities	(751.1)	(345.8)
FINANCING ACTIVITIES:
Repurchase of common stock	(35.8)	(126.6)
Payment of withholding taxes related to net share settlement of restricted stock units	(26.7)	(24.9)
Proceeds from employee stock plans	5.7	6.6
Repayment of term loan	(5.9)	0.0
Net cash used in financing activities	(62.7)	(144.9)
Decrease in cash and cash equivalents	(698.1)	(222.3)
Cash and cash equivalents at beginning of period	1,290.2	774.3
Cash and cash equivalents at end of period	592.1	552.0
Supplemental disclosure of cash flow information:
Cash paid for taxes	38.5	36.0
Cash paid for interest	5.4	3.2
Supplemental disclosure of non-cash transactions:
Unpaid property, plant and equipment in accounts payable and accrued expenses	16.4	7.1
Settlement of loan to NeoPhotonics	50.0	0.0
Right-of-use assets obtained in exchange for new operating lease liabilities	$ 19.4	$ 12.4