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Recently Adopted Accounting Pronouncements Recent Accounting Pronouncements (Details) - USD ($)
$ in Millions
Sep. 28, 2018
Jun. 30, 2018
Jun. 29, 2018
New Accounting Pronouncements or Change in Accounting Principle [Line Items]      
Retained earnings $ 9,172   $ 8,757
Pro Forma | Difference between Revenue Guidance in Effect before and after Topic 606 | Accounting Standards Update 2014-09      
New Accounting Pronouncements or Change in Accounting Principle [Line Items]      
Retained earnings   $ 56