Debt - Additional Information (Details)		12 Months Ended
	Jul. 31, 2020 USD ($)	Jul. 03, 2020 USD ($) shares	Jun. 28, 2019 USD ($)	Jun. 29, 2018 USD ($)	Feb. 28, 2018 USD ($) $ / shares
Debt Instrument [Line Items]
Repayment of debt		$ 982,000,000	$ 181,000,000	$ 17,074,000,000
Debt instrument, face amount		9,711,000,000	10,694,000,000
Issuance costs and debt discounts		136,000,000	172,000,000
Variable interest rate Term Loan A-1 maturing 2023
Debt Instrument [Line Items]
Debt issuance costs, net		7,000,000
Debt instrument, face amount		4,583,000,000	4,834,000,000
Revolving credit facility maturing 2023
Debt Instrument [Line Items]
Remaining borrowing capacity		$ 2,250,000,000
Ratio of total adjusted EBITDA to interest expense, Minimum		3.50
Variable interest rate Term Loan B-4 maturing 2023
Debt Instrument [Line Items]
Debt issuance costs, net		$ 1,000,000
Debt instrument, face amount		1,693,000,000	2,425,000,000
4.75% senior unsecured notes due 2026
Debt Instrument [Line Items]
Debt issuance costs, net		14,000,000
Debt instrument, face amount		$ 2,300,000,000	$ 2,300,000,000		$ 2,300,000,000
Debt instrument, interest rate (percentage)		4.75%	4.75%
0.50% convertible senior notes due 2020
Debt Instrument [Line Items]
Debt issuance costs, net		$ 1,000,000
Debt instrument, face amount		$ 35,000,000	$ 35,000,000
Debt instrument, interest rate (percentage)		0.50%	0.50%
Conversion ratio		0.0109006
Shares converted (in shares) | shares		2.6020
Conversion of stock, cash acquired		$ 735.79
Period Ending October 2, 2020 | Revolving credit facility maturing 2023
Debt Instrument [Line Items]
Ratio of total indebtedness to adjusted EBITDA, Maximum		4.25
Period Ending July 2, 2021 | Revolving credit facility maturing 2023
Debt Instrument [Line Items]
Ratio of total indebtedness to adjusted EBITDA, Maximum		4.00
Period ending December 31, 2021 | Revolving credit facility maturing 2023
Debt Instrument [Line Items]
Ratio of total indebtedness to adjusted EBITDA, Maximum		3.75
Period Ending July 1, 2022 | Revolving credit facility maturing 2023
Debt Instrument [Line Items]
Ratio of total indebtedness to adjusted EBITDA, Maximum		3.50
Period After July 1, 2022 | Revolving credit facility maturing 2023
Debt Instrument [Line Items]
Ratio of total indebtedness to adjusted EBITDA, Maximum		3.25
London Interbank Offered Rate (LIBOR) | Variable interest rate Term Loan A-1 maturing 2023
Debt Instrument [Line Items]
Basis spread on variable rate, floor		0.00%
Effective interest rate, percent		1.67%
London Interbank Offered Rate (LIBOR) | Revolving credit facility maturing 2023
Debt Instrument [Line Items]
Basis spread on variable rate, floor		0.00%
London Interbank Offered Rate (LIBOR) | Variable interest rate Term Loan B-4 maturing 2023
Debt Instrument [Line Items]
Basis spread on variable rate, floor		0.00%
Basis spread on variable rate		1.75%
Effective interest rate, percent		1.92%
Repayment of debt		$ 725,000,000
London Interbank Offered Rate (LIBOR) | Variable interest rate Term Loan B-4 maturing 2023 | Subsequent Event [Member]
Debt Instrument [Line Items]
Repayment of debt	$ 150,000,000
Base Rate | Variable interest rate Term Loan B-4 maturing 2023
Debt Instrument [Line Items]
Basis spread on variable rate		0.75%
Minimum | London Interbank Offered Rate (LIBOR) | Variable interest rate Term Loan A-1 maturing 2023
Debt Instrument [Line Items]
Basis spread on variable rate		1.125%
Minimum | London Interbank Offered Rate (LIBOR) | Revolving credit facility maturing 2023
Debt Instrument [Line Items]
Basis spread on variable rate		1.125%
Minimum | Base Rate | Variable interest rate Term Loan A-1 maturing 2023
Debt Instrument [Line Items]
Basis spread on variable rate		0.125%
Minimum | Base Rate | Revolving credit facility maturing 2023
Debt Instrument [Line Items]
Basis spread on variable rate		0.125%
Maximum | London Interbank Offered Rate (LIBOR) | Variable interest rate Term Loan A-1 maturing 2023
Debt Instrument [Line Items]
Basis spread on variable rate		2.00%
Maximum | London Interbank Offered Rate (LIBOR) | Revolving credit facility maturing 2023
Debt Instrument [Line Items]
Basis spread on variable rate		2.00%
Maximum | Base Rate | Variable interest rate Term Loan A-1 maturing 2023
Debt Instrument [Line Items]
Basis spread on variable rate		1.00%
Maximum | Base Rate | Revolving credit facility maturing 2023
Debt Instrument [Line Items]
Basis spread on variable rate		1.00%
Debt Instrument, Redemption, Period One | Variable interest rate Term Loan A-1 maturing 2023
Debt Instrument [Line Items]
Quarterly principal payment, percent		1.25%
Convertible Debt | 1.50% convertible notes due 2024
Debt Instrument [Line Items]
Debt issuance costs, net		$ 18,000,000
Debt instrument, face amount		$ 1,100,000,000	$ 1,100,000,000		$ 1,100,000,000
Debt instrument, interest rate (percentage)		1.50%	1.50%		1.50%
Conversion price (in dollars per share) | $ / shares					$ 121.91
Convertible debt instrument, carrying amount of equity component		$ 165,000,000
Debt issuance costs		15,000,000
Excess capital		3,000,000
Issuance costs and debt discounts		$ 113,000,000
Convertible Debt | Measurement Input, Discount Rate | 1.50% convertible notes due 2024
Debt Instrument [Line Items]
Debt instrument. measurement input		0.04375