Debt - Schedule of Instruments (Details) - USD ($) $ in Millions	3 Months Ended
	Apr. 26, 2020	Mar. 31, 2020	Jan. 26, 2020	Sep. 30, 2016
Debt Instrument [Line Items]
Unamortized debt discount and issuance costs	$ (41)		$ (9)
Net carrying amount	$ 6,959		1,991
2.20% Notes Due 2021
Debt Instrument [Line Items]
Stated interest rate	2.20%			2.20%
Expected Remaining Term (years)	1 year 4 months 24 days
Effective Interest Rate	2.38%
Long-term debt, gross	$ 1,000		1,000
3.20% Notes Due 2026
Debt Instrument [Line Items]
Stated interest rate	3.20%			3.20%
Expected Remaining Term (years)	6 years 4 months 24 days
Effective Interest Rate	3.31%
Long-term debt, gross	$ 1,000		1,000
2.85% Notes Due 2030
Debt Instrument [Line Items]
Stated interest rate	2.85%	2.85%
Expected Remaining Term (years)	9 years 10 months 24 days
Effective Interest Rate	2.93%
Long-term debt, gross	$ 1,500		0
3.50% Notes Due 2040
Debt Instrument [Line Items]
Stated interest rate	3.50%	3.50%
Expected Remaining Term (years)	19 years 10 months 24 days
Effective Interest Rate	3.54%
Long-term debt, gross	$ 1,000		0
3.50% Notes Due 2050
Debt Instrument [Line Items]
Stated interest rate	3.50%	3.50%
Expected Remaining Term (years)	30 years
Effective Interest Rate	3.54%
Long-term debt, gross	$ 2,000		0
3.70% Notes Due 2060
Debt Instrument [Line Items]
Stated interest rate	3.70%	3.70%
Expected Remaining Term (years)	40 years
Effective Interest Rate	3.73%
Long-term debt, gross	$ 500		$ 0