Restructuring and Impairment Charges - Additional Details (Details) - USD ($) $ in Millions	3 Months Ended
Dec. 30, 2017	Dec. 31, 2016
Restructuring and Related Activities [Abstract]
Restructuring and impairment charges	$ 15	$ 0
Other Income	$ 53	$ 0

Amount of restructuring charges, remediation cost, and asset impairment loss.

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 225
-SubTopic 10
-Section S99
-Paragraph 2
-Subparagraph (SX 210.5-03.3)
-URI http://asc.fasb.org/extlink&oid=63488584&loc=d3e20235-122688

Name:	us-gaap_RestructuringSettlementAndImpairmentProvisions
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration