Derivative Instruments Carrying Amount and Cumulative Basis Adjustment for Fair Value Hedges - Terminated Interest Rate Swaps (Details) - USD ($) $ in Millions	Jun. 29, 2019	Sep. 29, 2018
Interest rate \| Derivatives designated as hedges \| Fair Value Hedging
Derivative Instruments, Gain (Loss) [Line Items]
Deferred (Gain) Loss on Discontinuation of Fair Value Hedge	$ 38	$ 41

Amount as of the balance sheet date of the unamortized adjustment to the carrying value of an interest-bearing hedged item made under an effective fair value hedge that is amortized upon discontinuation of the fair value hedge.

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 815
-SubTopic 25
-Section 35
-Paragraph 9
-URI http://asc.fasb.org/extlink&oid=109978511&loc=d3e75592-113984

Name:	us-gaap_DeferredGainLossOnDiscontinuationOfFairValueHedge
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant