Fair Value Measurements and Investments - Debt Instrument Fair Value (Details) - USD ($) $ in Millions	Jul. 03, 2020	Jun. 28, 2019
0.50% convertible senior notes due 2020
Debt Instrument [Line Items]
Debt instrument, interest rate (percentage)	0.50%	0.50%
4.75% senior unsecured notes due 2026
Debt Instrument [Line Items]
Debt instrument, interest rate (percentage)	4.75%	4.75%
Reported Value Measurement
Debt Instrument [Line Items]
Long-term debt	$ 9,575	$ 10,522
Reported Value Measurement | 0.50% convertible senior notes due 2020
Debt Instrument [Line Items]
Long-term debt	34	33
Reported Value Measurement | Variable interest rate Term Loan A-1 maturing 2023
Debt Instrument [Line Items]
Long-term debt	4,576	4,824
Reported Value Measurement | Variable interest rate Term Loan B-4 maturing 2023
Debt Instrument [Line Items]
Long-term debt	1,692	2,424
Reported Value Measurement | 1.50% convertible notes due 2024
Debt Instrument [Line Items]
Long-term debt	987	958
Reported Value Measurement | 4.75% senior unsecured notes due 2026
Debt Instrument [Line Items]
Long-term debt	2,286	2,283
Level 2 | Estimate of Fair Value Measurement
Debt Instrument [Line Items]
Long-term debt	9,624	10,430
Level 2 | Estimate of Fair Value Measurement | 0.50% convertible senior notes due 2020
Debt Instrument [Line Items]
Long-term debt	30	31
Level 2 | Estimate of Fair Value Measurement | Variable interest rate Term Loan A-1 maturing 2023
Debt Instrument [Line Items]
Long-term debt	4,474	4,780
Level 2 | Estimate of Fair Value Measurement | Variable interest rate Term Loan B-4 maturing 2023
Debt Instrument [Line Items]
Long-term debt	1,656	2,370
Level 2 | Estimate of Fair Value Measurement | 1.50% convertible notes due 2024
Debt Instrument [Line Items]
Long-term debt	1,036	986
Level 2 | Estimate of Fair Value Measurement | 4.75% senior unsecured notes due 2026
Debt Instrument [Line Items]
Long-term debt	$ 2,428	$ 2,263