Fair Value Measurements and Investments - Debt Instrument Fair Value (Details) - USD ($) $ in Millions	Oct. 02, 2020	Jul. 03, 2020
0.50% convertible senior notes due 2020
Debt Instrument [Line Items]
Debt instrument, interest rate (percentage)	0.50%	0.50%
1.50% convertible notes due 2024 | Convertible Debt
Debt Instrument [Line Items]
Debt instrument, interest rate (percentage)	1.50%	1.50%
4.75% senior unsecured notes due 2026
Debt Instrument [Line Items]
Debt instrument, interest rate (percentage)	4.75%	4.75%
Carrying Value
Debt Instrument [Line Items]
Long-term debt	$ 9,372	$ 9,575
Carrying Value | 0.50% convertible senior notes due 2020
Debt Instrument [Line Items]
Long-term debt	35	34
Carrying Value | Variable interest rate Term Loan A-1 maturing 2023
Debt Instrument [Line Items]
Long-term debt	4,514	4,576
Carrying Value | Variable interest rate Term Loan B-4 maturing 2023
Debt Instrument [Line Items]
Long-term debt	1,543	1,692
Carrying Value | 1.50% convertible notes due 2024
Debt Instrument [Line Items]
Long-term debt	994	987
Carrying Value | 4.75% senior unsecured notes due 2026
Debt Instrument [Line Items]
Long-term debt	2,286	2,286
Level 2 | Fair Value
Debt Instrument [Line Items]
Long-term debt	9,515	9,624
Level 2 | Fair Value | 0.50% convertible senior notes due 2020
Debt Instrument [Line Items]
Long-term debt	34	30
Level 2 | Fair Value | Variable interest rate Term Loan A-1 maturing 2023
Debt Instrument [Line Items]
Long-term debt	4,427	4,474
Level 2 | Fair Value | Variable interest rate Term Loan B-4 maturing 2023
Debt Instrument [Line Items]
Long-term debt	1,536	1,656
Level 2 | Fair Value | 1.50% convertible notes due 2024
Debt Instrument [Line Items]
Long-term debt	1,043	1,036
Level 2 | Fair Value | 4.75% senior unsecured notes due 2026
Debt Instrument [Line Items]
Long-term debt	$ 2,475	$ 2,428