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Equity Summary of Accumulated Other Comprehensive Income (loss) (Details) - USD ($)
$ in Millions
Dec. 28, 2019
Dec. 29, 2018
Equity [Abstract]    
Cash flow hedges — unrealized net gain (loss) $ (60) $ (53)
Foreign currency translation adjustments (1,399) (1,467)
Postretirement and postemployment benefits:    
Net experience gain (loss) 7 23
Prior service credit (cost) 4 (3)
Total accumulated other comprehensive income (loss)    
Accumulated other comprehensive income (loss) $ (1,448) $ (1,500)