Goodwill and Other Intangible Assets (Changes in Carrying Amount of Goodwill) (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018
Goodwill [Roll Forward]
Goodwill, Beginning of Period	$ 17,888	$ 16,747
Acquisitions	2,828	1,227
Transfers	0	0
Foreign currency translation and other adjustments	(92)	(86)
Goodwill, End of Period	20,624	17,888
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Goodwill [Roll Forward]
Goodwill, Beginning of Period	17,521	16,295
Acquisitions	2,353	1,227
Transfers	9	80
Foreign currency translation and other adjustments	38	(81)
Goodwill, End of Period	19,921	17,521
Other Bets
Goodwill [Roll Forward]
Goodwill, Beginning of Period	367	452
Acquisitions	475	0
Transfers	(9)	(80)
Foreign currency translation and other adjustments	(130)	(5)
Goodwill, End of Period	$ 703	$ 367