Derivative Instruments Effect of Foreign Currency Cash Flow Hedges on AOCI (Details) - USD ($) $ in Millions		3 Months Ended	6 Months Ended
		Mar. 30, 2019	Mar. 30, 2019
Foreign Currency Fair Value Hedge Derivative [Line Items]
Unrealized Gain (Loss) on Foreign Currency Derivatives, Net, before Tax		$ (91)	$ (41)
Foreign Currency Cash Flow Hedge Gain (Loss) Reclassified to Earnings, Net	[1]	$ 20	$ 57

[1] Primarily recorded in revenue