ALLIANCES - Financial Information Pertaining to Alliances (Otsuka) (Details) - USD ($) $ in Millions		12 Months Ended
		Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Collaborative Arrangement and Arrangement Other than Collaborative [Line Items]
Total Revenues		$ 46,385	$ 42,518	$ 26,145
Cost of products sold	[1]	9,940	11,773	8,078
Collaborative Arrangement
Collaborative Arrangement and Arrangement Other than Collaborative [Line Items]
Total Revenues		11,556	9,979	10,541
Cost of products sold		5,227	4,485	4,169
Collaborative Arrangement | Otsuka
Collaborative Arrangement and Arrangement Other than Collaborative [Line Items]
Collaboration distribution fees			294
Net sales threshold, collaboration distribution fee			$ 1,000
Collaboration distribution fee percentage			1.00%
Cost of products sold				302
Net product sales
Collaborative Arrangement and Arrangement Other than Collaborative [Line Items]
Total Revenues		45,055	$ 41,321	25,174
Net product sales | Collaborative Arrangement
Collaborative Arrangement and Arrangement Other than Collaborative [Line Items]
Total Revenues		$ 10,840	$ 9,364	9,944
Net product sales | Collaborative Arrangement | Otsuka
Collaborative Arrangement and Arrangement Other than Collaborative [Line Items]
Total Revenues				$ 1,800

[1] Excludes amortization of acquired intangible assets.