CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Millions	12 Months Ended
	Jun. 29, 2024	Jul. 01, 2023	Jul. 02, 2022
OPERATING ACTIVITIES:
Net income (loss)	$ (546.5)	$ (131.6)	$ 198.9
Adjustments to reconcile net income (loss) to net cash provided by operating activities:
Depreciation expense	110.6	106.6	81.6
Stock-based compensation	128.8	148.4	103.1
Amortization and write-off of acquired intangible assets	179.7	149.0	85.5
(Gain) loss on sales and dispositions of property, plant and equipment	2.6	8.6	(3.0)
Amortization of debt discount and debt issuance costs	14.6	24.3	72.4
Amortization of inventory fair value adjustment in connection with acquisition	8.3	17.8	0.0
Gain on repurchase of convertible notes	0.0	(1.0)	0.0
Other non-cash (income) expenses, net	(12.2)	(5.7)	11.4
Changes in operating assets and liabilities:
Accounts receivable	72.3	83.2	(49.2)
Inventories	73.8	(81.5)	(51.8)
Operating lease right-of-use assets, net	3.4	15.5	(6.2)
Prepayments and other current and non-currents assets	30.6	(4.2)	(14.3)
Income taxes, net	77.7	(37.9)	(21.1)
Accounts payable	(89.7)	(74.0)	47.0
Accrued payroll and related expenses	(8.9)	(36.3)	0.3
Operating lease liabilities	(4.3)	(16.2)	0.6
Accrued expenses and other current and non-current liabilities	(16.1)	14.8	4.1
Net cash provided by operating activities	24.7	179.8	459.3
INVESTING ACTIVITIES:
Payments for acquisition of property, plant and equipment	(133.0)	(128.5)	(91.2)
Acquisition of businesses, net of cash acquired	(700.9)	(861.6)	0.0
Payment for acquisition of intangible assets	(4.0)	0.0	0.0
Purchases of short-term investments	(278.7)	(1,030.3)	(1,085.1)
Proceeds from maturities and sales of short-term investments	1,001.5	1,146.1	973.6
Term loan funding provided to NeoPhotonics	0.0	0.0	(30.0)
Proceeds from the sales of property and equipment	0.8	0.3	6.4
Net cash used in investing activities	(114.3)	(874.0)	(226.3)
FINANCING ACTIVITIES:
Payment, repurchase and conversion of 2024 Notes		(132.8)	(1.8)
Repayment of term loan	(323.1)	(5.9)	0.0
Repurchase of common stock	0.0	(175.6)	(543.9)
Payment of withholding taxes related to net share settlement of restricted stock units	(24.0)	(37.2)	(39.0)
Proceeds from employee stock plans	14.4	15.1	13.5
Net cash provided by (used in) financing activities	(332.7)	263.0	282.9
Increase (decrease) in cash and cash equivalents	(422.3)	(431.2)	515.9
Cash and cash equivalents at beginning of period	859.0	1,290.2	774.3
Cash and cash equivalents at end of period	436.7	859.0	1,290.2
Supplemental disclosure of cash flow information:
Cash paid for taxes, net	61.2	67.3	57.0
Cash paid for interest	19.7	10.8	7.5
Supplemental disclosure of non-cash transactions:
Settlement of loan to NeoPhotonics	0.0	50.0	0.0
2029 Notes issuance costs in current liabilities	0.0	0.8	0.0
Right-of-use assets obtained in exchange for new operating lease liabilities	16.0	19.4	14.8
Share-based purchase price consideration in connection with the Cloud Light acquisition	23.5	0.0	0.0
Repurchase of common stock pending settlement	0.0	0.0	10.1
Property, Plant and Equipment
Supplemental disclosure of non-cash transactions:
Unpaid property, plant and equipment in accounts payable and accrued expenses	11.8	9.8	3.4
Finite-Lived Intangible Assets
Supplemental disclosure of non-cash transactions:
Unpaid property, plant and equipment in accounts payable and accrued expenses	1.0	0.0	0.0
2029 Notes
FINANCING ACTIVITIES:
Proceeds from the issuance of notes, net of issuance costs	0.0	599.4	0.0
2028 Notes
FINANCING ACTIVITIES:
Proceeds from the issuance of notes, net of issuance costs	$ 0.0	$ 0.0	$ 854.1