Derivative Instruments - Effect of foreign Currency Cash Flow Hedges on AOCI (Details) $ in Millions	12 Months Ended
	Sep. 28, 2019 USD ($)
Foreign Currency Fair Value Hedge Derivative [Line Items]
Unrealized Gain (Loss) on Foreign Currency Derivatives, Net, before Tax	$ 156
Foreign Currency Cash Flow Hedge Gain (Loss) Reclassified to Earnings, Net	$ 183	[1]

[1] Primarily recorded in revenue.