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Income Taxes Income Tax (Details) - USD ($)
$ in Millions
3 Months Ended 9 Months Ended
Dec. 29, 2018
Jun. 27, 2020
Sep. 28, 2019
Income Tax [Line Items]      
Effective Income Tax Rate Reconciliation, at Federal Statutory Income Tax Rate, Percent   23.00%  
Unrecognized Tax Benefits   $ 2,900 $ 3,000
Significant Change in Unrecognized Tax Benefits is Reasonably Possible, Amount of Unrecorded Benefit   200  
Unrecognized Tax Benefits that Would Impact Effective Tax Rate   100  
Unrecognized Tax Benefits, Period Increase (Decrease)   $ 100  
Accounting Standards Update 2016-16      
Income Tax [Line Items]      
Adoption of new accounting guidance $ 100