ALLIANCES - Financial Information Pertaining to Alliances (Ono) (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Collaborative Arrangement and Arrangement Other than Collaborative [Line Items]
Total Revenues	$ 45,006	$ 46,159	$ 46,385
Ono
Collaborative Arrangement and Arrangement Other than Collaborative [Line Items]
Total Revenues	588	657	636
Alliance revenues
Collaborative Arrangement and Arrangement Other than Collaborative [Line Items]
Total Revenues	$ 13,151	12,743	11,556
Alliance revenues | Ono
Collaborative Arrangement and Arrangement Other than Collaborative [Line Items]
Co-promotion fee percentage	60.00%
Total Revenues	$ 408	441	385
Alliance revenues | Ono | Maximum
Collaborative Arrangement and Arrangement Other than Collaborative [Line Items]
Profit sharing involving only one compound	80.00%
Alliance revenues | Ono | Minimum
Collaborative Arrangement and Arrangement Other than Collaborative [Line Items]
Profit sharing involving only one compound	20.00%
Alliance revenues | North America | Ono
Collaborative Arrangement and Arrangement Other than Collaborative [Line Items]
Royalty rate due to regulatory approvals	4.00%
Alliance revenues | Rest of World Except Japan, South Korea and Taiwan | Ono
Collaborative Arrangement and Arrangement Other than Collaborative [Line Items]
Royalty rate due to regulatory approvals	15.00%
Net product sales
Collaborative Arrangement and Arrangement Other than Collaborative [Line Items]
Total Revenues	$ 43,778	44,671	45,055
Net product sales | Alliance revenues
Collaborative Arrangement and Arrangement Other than Collaborative [Line Items]
Total Revenues	12,543	12,001	10,840
Net product sales | Alliance revenues | Ono
Collaborative Arrangement and Arrangement Other than Collaborative [Line Items]
Total Revenues	$ 180	$ 216	$ 251