Basis of Presentation and Significant Accounting Policies Update Recently Adopted Accounting Pronouncements (Details) - USD ($) $ in Millions		3 Months Ended
	Oct. 01, 2018	Jun. 30, 2019	Sep. 30, 2018	Jun. 24, 2018	Sep. 24, 2017
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Retained Earnings	$ 1,382	$ 4,687	$ 542
Restricted cash and cash equivalents		0		$ 4,831
Deferred Tax Asset Write Off		$ 2,500
Other Noncurrent Assets [Member]
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Restricted cash and cash equivalents					$ 2,000
Accounting Standards Update 2016-01 [Member]
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Retained Earnings	50
Reclassifications from accumulated other comprehensive income	50
Accounting Standards Update 2016-16 [Member]
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Retained Earnings	$ 2,600
Redemption of fixed-rate notes due 2019 and 2020 [Member] | Other Current Assets [Member]
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Restricted cash and cash equivalents				$ 2,800