Financial Instruments - Long-Term Debt - New Issuances (Details) - Senior Notes [Member] - USD ($) $ in Millions		Sep. 29, 2019	Jun. 03, 2016
Debt Instrument [Line Items]
Principal	[1]	$ 5,000
Weighted-average effective interest rate			3.57%
2.800% notes [Member]
Debt Instrument [Line Items]
Principal	[2]	$ 500
Stated interest rate		2.80%
2.950% notes [Member]
Debt Instrument [Line Items]
Principal	[2]	$ 750
Stated interest rate		2.95%
3.450% notes [Member]
Debt Instrument [Line Items]
Principal	[2]	$ 1,750
Stated interest rate		3.45%
3.900% notes [Member]
Debt Instrument [Line Items]
Principal	[2]	$ 750
Stated interest rate		3.90%
4.000% notes [Member]
Debt Instrument [Line Items]
Principal	[2]	$ 1,250
Stated interest rate		4.00%

[1] The weighted-average effective interest rate for the notes at issuance was 3.57%.

[2] Fixed rate notes may be redeemed by us at any time, in whole, or in part, at varying redemption prices plus accrued and unpaid interest.