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Goodwill and Other Intangible Assets - Schedule of Goodwill Rollforward (Details) - USD ($)
$ in Millions
12 Months Ended
Dec. 31, 2019
Dec. 31, 2018
Goodwill [Roll Forward]    
Goodwill, beginning balance $ 13,085 $ 12,216
Acquisitions 235 889
Foreign currency translation 20 (38)
Other activity, net 2 18
Goodwill, ending balance $ 13,342 $ 13,085