Segment Reporting (Details) $ in Millions	3 Months Ended		6 Months Ended
	Dec. 31, 2021 USD ($)	Jan. 01, 2021 USD ($)	Dec. 31, 2021 USD ($) segment	Jan. 01, 2021 USD ($) segment
Segment Reporting [Abstract]
Number of product business units | segment			2	1
Number of reportable segments | segment			2	1
Segment Reporting Information [Line Items]
Revenue, net	$ 4,833	$ 3,943	$ 9,884	$ 7,865
Gross profit	1,583	960	3,248	1,864
Stock-based compensation expense			163	156
Total operating expenses	856	802	1,743	1,636
Gross profit	$ 1,583	$ 960	$ 3,248	$ 1,864
Gross margin, percentage	32.80%	24.30%	32.90%	23.70%
Operating Segments
Segment Reporting Information [Line Items]
Revenue, net	$ 4,833	$ 3,943	$ 9,884	$ 7,865
Gross profit	1,623	1,039	3,336	2,070
Gross profit	1,623	1,039	3,336	2,070
Corporate, Non-Segment
Segment Reporting Information [Line Items]
Amortization of acquired intangible assets	(26)	(109)	(65)	(254)
Stock-based compensation expense	(14)	(15)	(23)	(27)
Charges related to a power outage incident and related recovery	0	45	0	75
Total operating expenses	$ (40)	$ (79)	$ (88)	$ (206)
HDD
Segment Reporting Information [Line Items]
Gross margin, percentage	30.60%	25.60%	30.80%	25.90%
HDD | Operating Segments
Segment Reporting Information [Line Items]
Revenue, net	$ 2,213	$ 1,909	$ 4,774	$ 3,753
Gross profit	677	488	1,469	971
Gross profit	$ 677	$ 488	$ 1,469	$ 971
Flash
Segment Reporting Information [Line Items]
Gross margin, percentage	36.10%	27.10%	36.50%	26.70%
Flash | Operating Segments
Segment Reporting Information [Line Items]
Revenue, net	$ 2,620	$ 2,034	$ 5,110	$ 4,112
Gross profit	946	551	1,867	1,099
Gross profit	$ 946	$ 551	$ 1,867	$ 1,099