Goodwill and Intangible Assets, Intangible Assets (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Dec. 28, 2019	Dec. 29, 2018	Dec. 28, 2019	Dec. 29, 2018	Jun. 29, 2019
Intangible Assets, Net (Excluding Goodwill) [Abstract]
Finite-Lived Intangible Assets, Gross	$ 619,115		$ 619,115		$ 616,325
Accumulated Amortization	570,606		570,606		562,873
Net	48,509		48,509		53,452
Intangible Assets, Gross	619,115		619,115		619,115
Total purchased intangible assets	48,509		48,509		56,242
Cost, Amortization	3,111	$ 6,868	6,221	$ 13,783
Intangible asset amortization	756	756	1,512	1,529
Intangible Asset Amortization Expense	3,867	$ 7,624	7,733	$ 15,312
Future amortization expense [Abstract]
Remaining three months of 2017	7,733		7,733
2019	13,767		13,767
2020	8,088		8,088
2021	7,604		7,604
2022	4,628		4,628
Thereafter	6,689		6,689
Net	48,509		48,509		53,452
Intellectual Property [Member]
Intangible Assets, Net (Excluding Goodwill) [Abstract]
Finite-Lived Intangible Assets, Gross	490,136		490,136		487,346
Accumulated Amortization	451,780		451,780		445,558
Net	38,356		38,356		41,788
Future amortization expense [Abstract]
Net	38,356		38,356		41,788
Customer relationships [Member]
Intangible Assets, Net (Excluding Goodwill) [Abstract]
Finite-Lived Intangible Assets, Gross	116,505		116,505		116,505
Accumulated Amortization	107,244		107,244		105,901
Net	9,261		9,261		10,604
Future amortization expense [Abstract]
Net	9,261		9,261		10,604
Tradename [Member]
Intangible Assets, Net (Excluding Goodwill) [Abstract]
Finite-Lived Intangible Assets, Gross	9,974		9,974		9,974
Accumulated Amortization	9,082		9,082		8,914
Net	892		892		1,060
Future amortization expense [Abstract]
Net	892		892		1,060
Patents [Member]
Intangible Assets, Net (Excluding Goodwill) [Abstract]
Finite-Lived Intangible Assets, Gross	2,500		2,500		2,500
Accumulated Amortization	2,500		2,500		2,500
Net	0		0		0
Future amortization expense [Abstract]
Net	0		0		0
In Process Research and Development [Member]
Intangible Assets, Net (Excluding Goodwill) [Abstract]
IPR&D	$ 0		$ 0		$ 2,790