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Financing Arrangements - Additional Information (Detail)		1 Months Ended		3 Months Ended	6 Months Ended		12 Months Ended
	Jul. 27, 2020 USD ($)	Jun. 30, 2020 USD ($)	Jul. 28, 2017 USD ($) Extension	Jul. 31, 2020 USD ($)	Oct. 30, 2020 USD ($)	Oct. 25, 2019 USD ($)	Apr. 24, 2020 USD ($)
Debt Instrument [Line Items]
Issuance of debt, net of issuance costs					$ 2,057,000,000	$ 0
Commercial paper notes					0		$ 522,000,000
Revolving Credit Facility
Debt Instrument [Line Items]
Credit facility, amount			$ 1,000,000,000.0
Credit facility, date expiry			Dec. 10, 2021
Credit facility, increase in facility			$ 300,000,000
Credit facility, number of extensions | Extension			2
Credit facility, extensions period			1 year
Credit facility, amounts drawn					0
Revolving Credit Facility | Letter Of Credit Sub Facility
Debt Instrument [Line Items]
Credit facility, amount			$ 50,000,000
Commercial Paper
Debt Instrument [Line Items]
Notes issued, principal amount							$ 523,000,000
Issuance of debt, net of issuance costs					75,000,000
Weighted-average interest rate							2.01%
Proceeds from repayments of debt					176,000,000
Commercial Paper | Maximum
Debt Instrument [Line Items]
Notes issued, principal amount			$ 1,000,000,000.0
Debt instrument maturity period			397 days				3 months
Senior Notes
Debt Instrument [Line Items]
Notes issued, principal amount					2,650,000,000		$ 1,150,000,000
Issuance of debt, net of issuance costs		$ 2,000,000,000.0
Cash redemption premium				$ 13,000,000
Write-off of unamortized discount and issuance costs				1,000,000
Senior Notes | Other Income (Expense), Net
Debt Instrument [Line Items]
Loss on extinguishment of debt				$ 14,000,000
Senior Notes | Due June 2027
Debt Instrument [Line Items]
Notes issued, principal amount		$ 550,000,000			550,000,000		0
Notes issued, interest rate		2.375%
Senior Notes | Due June 2025
Debt Instrument [Line Items]
Notes issued, principal amount		$ 750,000,000			750,000,000		0
Notes issued, interest rate		1.875%
Senior Notes | Due June 2030
Debt Instrument [Line Items]
Notes issued, principal amount		$ 700,000,000			700,000,000		0
Notes issued, interest rate		2.70%
Senior Notes | Due June 2021
Debt Instrument [Line Items]
Notes issued, principal amount					0		500,000,000
Notes issued, interest rate	3.375%
Extinguishment of debt amount	$ 513,000,000
Senior Notes | Due September 2024
Debt Instrument [Line Items]
Notes issued, principal amount					$ 400,000,000		400,000,000
Notes issued, interest rate					3.30%
Senior Notes | Due December 2022
Debt Instrument [Line Items]
Notes issued, principal amount					$ 250,000,000		$ 250,000,000
Notes issued, interest rate					3.25%

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