CONSOLIDATED STATEMENTS OF OPERATIONS - USD ($) shares in Millions, $ in Millions	3 Months Ended								12 Months Ended
	Jul. 03, 2021	Apr. 03, 2021	Dec. 26, 2020	Sep. 26, 2020	Jun. 27, 2020	Mar. 28, 2020	Dec. 28, 2019	Sep. 28, 2019	Jul. 03, 2021	Jun. 27, 2020	Jun. 29, 2019
Income Statement [Abstract]
Net revenue	$ 392.1	$ 419.5	$ 478.8	$ 452.4	$ 368.1	$ 402.8	$ 457.8	$ 449.9	$ 1,742.8	$ 1,678.6	$ 1,565.3
Cost of sales	213.4	218.7	234.2	231.7	217.4	231.2	256.3	269.7	898.0	974.6	1,092.9
Amortization of acquired developed intangibles	15.9	15.8	15.0	15.0	15.0	13.9	12.4	12.5	61.7	53.8	46.5
Gross profit	162.8	185.0	229.6	205.7	135.7	157.7	189.1	167.7	783.1	650.2	425.9
Operating expenses:
Research and development	54.1	57.2	52.8	50.4	49.0	48.7	51.0	49.9	214.5	198.6	184.6
Selling, general and administrative	58.3	65.5	61.3	56.3	54.8	61.3	62.4	56.7	241.4	235.2	200.3
Restructuring and related charges	4.6	2.9	0.2	0.0	3.1	2.7	0.9	1.3	7.7	8.0	31.9
Merger termination fee and related costs, net	0.0	(207.5)	0.0	0.0	0.0	0.0	0.0	0.0	(207.5)	0.0	0.0
Impairment charges	0.0	0.0	0.0	0.0	1.8	2.5	0.0	0.0	0.0	4.3	30.7
Total operating expenses	117.0	(81.9)	114.3	106.7	108.7	115.2	114.3	107.9	256.1	446.1	447.5
Income (loss) from operations	45.8	266.9	115.3	99.0	27.0	42.5	74.8	59.8	527.0	204.1	(21.6)
Unrealized gain on derivative liability									0.0	0.0	8.8
Interest expense	(18.0)	(16.4)	(16.3)	(16.0)	(15.9)	(15.6)	(18.3)	(11.4)	(66.7)	(61.2)	(36.3)
Other income (expense), net	0.7	2.4	(0.9)	0.6	3.5	21.7	1.2	5.0	2.8	31.4	15.8
Income (loss) before income taxes	28.5	252.9	98.1	83.6	14.6	48.6	57.7	53.4	463.1	174.3	(33.3)
Provision for income taxes	7.0	27.4	14.9	16.5	19.2	5.2	8.6	5.8	65.8	38.8	3.1
Net income (loss)	21.5	225.5	83.2	67.1	(4.6)	43.4	49.1	47.6	397.3	135.5	(36.4)
Items reconciling net income (loss) to net income (loss) attributable to common stockholders:
Less: Cumulative dividends on Series A Preferred Stock									0.0	0.0	(0.3)
Less: Earnings allocated to Series A Preferred Stock									0.0	0.0	(1.2)
Net income (loss) attributable to common stockholders - Basic	21.5	225.5	83.2	67.1	(4.6)	43.4	49.1	47.6	397.3	135.5	(37.9)
Net income (loss) attributable to common stockholders - Diluted	$ 21.5	$ 225.5	$ 83.2	$ 67.1	$ (4.6)	$ 43.4	$ 49.1	$ 47.6	$ 397.3	$ 135.5	$ (37.9)
Net income (loss) per share attributable to common stockholders:
Basic (in dollars per share)	$ 0.29	$ 2.97	$ 1.10	$ 0.89	$ (0.06)	$ 0.58	$ 0.64	$ 0.62	$ 5.27	$ 1.79	$ (0.54)
Diluted (in dollars per share)	$ 0.28	$ 2.85	$ 1.06	$ 0.86	$ (0.06)	$ 0.56	$ 0.63	$ 0.61	$ 5.07	$ 1.75	$ (0.54)
Shares used to compute net income (loss) per share attributable to common stockholders:
Basic (in shares)	74.8	75.8	75.6	75.3	75.0	74.8	76.8	76.9	75.4	75.9	70.7
Diluted (in shares)	77.5	79.2	78.4	78.2	75.0	77.5	78.0	77.6	78.4	77.6	70.7