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Goodwill and Intangible Assets - Changes in Goodwill and Intangible Assets (Details) - USD ($)
9 Months Ended
Jul. 01, 2020
Sep. 30, 2020
Goodwill    
Balance at January 1, 2020   $ 20,848,000,000
Currency   (42,000,000)
Acquisition   529,000,000
Asset impairments $ 0 0
Balance at September 30, 2020   21,335,000,000
Intangible Assets, at cost    
Balance at January 1, 2020   19,670,000,000
Currency   (216,000,000)
Acquisition   553,000,000
Asset impairments   (144,000,000)
Balance at September 30, 2020   $ 19,863,000,000