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- Goodwill and Other Intangible Assets Rollforward (Details)
$ in Millions
3 Months Ended
Mar. 31, 2019
USD ($)
Changes in the net carrying amount of goodwill by operating segment  
Beginning balance $ 8,171
Goodwill related to current year acquisitions 15
Goodwill related to disposals (1)
Goodwill related to prior year acquisitions 1
Foreign currency translation and other 33
Ending balance $ 8,219