Cash, Cash Equivalents, Restricted Cash and Borrowings Interest Expense, net (Details) - USD ($) $ in Millions	3 Months Ended
Dec. 29, 2018	Dec. 30, 2017
Interest expense	$ (163)	$ (146)
Interest and investment income	75	17
Net periodic pension and postretirement benefit costs other than service costs	25	0
Interest expense, net	$ (63)	$ (129)

Amount of the cost of borrowed funds accounted for as interest expense.

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 835
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Reference 3: http://www.xbrl.org/2003/role/disclosureRef
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Reference 4: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
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Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration