Revenues - Disaggregation of Revenue (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jan. 03, 2020	Dec. 28, 2018	Jan. 03, 2020	Dec. 28, 2018
Disaggregation of Revenue [Line Items]
Revenue, net	$ 4,234	$ 4,233	$ 8,274	$ 9,261
Americas
Disaggregation of Revenue [Line Items]
Revenue, net	1,296	1,015	2,609	2,296
Europe, Middle East and Africa
Disaggregation of Revenue [Line Items]
Revenue, net	811	817	1,590	1,701
Asia
Disaggregation of Revenue [Line Items]
Revenue, net	2,127	2,401	4,075	5,264
Client Devices
Disaggregation of Revenue [Line Items]
Revenue, net	1,797	2,214	3,413	4,864
Data Center Devices & Solutions
Disaggregation of Revenue [Line Items]
Revenue, net	1,489	1,074	3,021	2,520
Client Solutions
Disaggregation of Revenue [Line Items]
Revenue, net	948	945	1,840	1,877
Hard disk drives (“HDD”)
Disaggregation of Revenue [Line Items]
Revenue, net	2,396	2,060	4,804	4,554
Flash-based
Disaggregation of Revenue [Line Items]
Revenue, net	$ 1,838	$ 2,173	$ 3,470	$ 4,707