Fair Value Measurements and Investments - Debt Instrument Fair Value (Details) - USD ($) $ in Millions	Jan. 03, 2020	Jun. 28, 2019
0.50% convertible senior notes due 2020
Debt Instrument [Line Items]
Debt instrument, interest rate (percentage)	0.50%
4.75% senior unsecured notes due 2026
Debt Instrument [Line Items]
Debt instrument, interest rate (percentage)	4.75%
Reported Value Measurement
Debt Instrument [Line Items]
Long-term debt	$ 9,833	$ 10,522
Reported Value Measurement | 0.50% convertible senior notes due 2020
Debt Instrument [Line Items]
Long-term debt	33	33
Reported Value Measurement | Variable interest rate Term Loan A-1 maturing 2023
Debt Instrument [Line Items]
Long-term debt	4,700	4,824
Reported Value Measurement | Variable interest rate U.S. Term Loan B-4 maturing 2023
Debt Instrument [Line Items]
Long-term debt	1,843	2,424
Reported Value Measurement | 1.50% convertible notes due 2024
Debt Instrument [Line Items]
Long-term debt	973	958
Reported Value Measurement | 4.75% senior unsecured notes due 2026
Debt Instrument [Line Items]
Long-term debt	2,284	2,283
Level 2 | Estimate of Fair Value Measurement
Debt Instrument [Line Items]
Long-term debt	10,115	10,430
Level 2 | Estimate of Fair Value Measurement | 0.50% convertible senior notes due 2020
Debt Instrument [Line Items]
Long-term debt	33	31
Level 2 | Estimate of Fair Value Measurement | Variable interest rate Term Loan A-1 maturing 2023
Debt Instrument [Line Items]
Long-term debt	4,720	4,780
Level 2 | Estimate of Fair Value Measurement | Variable interest rate U.S. Term Loan B-4 maturing 2023
Debt Instrument [Line Items]
Long-term debt	1,857	2,370
Level 2 | Estimate of Fair Value Measurement | 1.50% convertible notes due 2024
Debt Instrument [Line Items]
Long-term debt	1,085	986
Level 2 | Estimate of Fair Value Measurement | 4.75% senior unsecured notes due 2026
Debt Instrument [Line Items]
Long-term debt	$ 2,419	$ 2,263