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Goodwill and Intangible Assets Changes in the Carrying Amount of Indefinite-Lived Intangible Assets (Details) - USD ($)
$ in Millions
3 Months Ended 12 Months Ended
Dec. 29, 2018
Sep. 29, 2018
Jun. 30, 2018
Jul. 01, 2017
Dec. 29, 2018
Indefinite-lived Intangible Assets [Roll Forward]          
Beginning balance         $ 53,655
Impairment losses $ (8,600) $ (215) $ (101) $ (49) (8,925)
Reclassified to assets held for sale         (341)
Transfers to definite-lived intangible assets         (72)
Translation adjustments         (351)
Ending balance $ 43,966       $ 43,966