Fair Value Measurements and Investments - Debt Instrument Fair Value (Details) - USD ($) $ in Millions	Oct. 04, 2019	Jun. 28, 2019
0.50% convertible senior notes due 2020
Debt Instrument [Line Items]
Debt instrument, interest rate (percentage)	0.50%
1.50% convertible notes due 2024
Debt Instrument [Line Items]
Debt instrument, interest rate (percentage)	1.50%
4.750% senior unsecured notes due 2026
Debt Instrument [Line Items]
Debt instrument, interest rate (percentage)	4.75%
Carrying Value
Debt Instrument [Line Items]
Long-term debt	$ 10,212	$ 10,522
Carrying Value | 0.50% convertible senior notes due 2020
Debt Instrument [Line Items]
Long-term debt	33	33
Carrying Value | Variable interest rate Term Loan A-1 maturing 2023
Debt Instrument [Line Items]
Long-term debt	4,762	4,824
Carrying Value | Variable interest rate U.S. Term Loan B-4 maturing 2023
Debt Instrument [Line Items]
Long-term debt	2,168	2,424
Carrying Value | 1.50% convertible notes due 2024
Debt Instrument [Line Items]
Long-term debt	965	958
Carrying Value | 4.750% senior unsecured notes due 2026
Debt Instrument [Line Items]
Long-term debt	2,284	2,283
Level 2 | Fair Value
Debt Instrument [Line Items]
Long-term debt	10,383	10,430
Level 2 | Fair Value | 0.50% convertible senior notes due 2020
Debt Instrument [Line Items]
Long-term debt	33	31
Level 2 | Fair Value | Variable interest rate Term Loan A-1 maturing 2023
Debt Instrument [Line Items]
Long-term debt	4,774	4,780
Level 2 | Fair Value | Variable interest rate U.S. Term Loan B-4 maturing 2023
Debt Instrument [Line Items]
Long-term debt	2,167	2,370
Level 2 | Fair Value | 1.50% convertible notes due 2024
Debt Instrument [Line Items]
Long-term debt	1,058	986
Level 2 | Fair Value | 4.750% senior unsecured notes due 2026
Debt Instrument [Line Items]
Long-term debt	$ 2,351	$ 2,263