ALLIANCES (Details) - USD ($) $ in Millions		3 Months Ended				9 Months Ended
		Sep. 30, 2022	Jun. 30, 2022	Sep. 30, 2021	Jun. 30, 2021	Sep. 30, 2022	Sep. 30, 2021	Dec. 31, 2021
Alliance Statement [Line Items]
Total Revenues		$ 11,218		$ 11,624		$ 34,753	$ 34,400
Cost of products sold	[1]	2,353		2,291		7,544	7,584
Research and development		2,418		2,980		6,999	7,677
Acquired IPRD		30		271		763	1,070
Other (income)/expense, net		(140)		(409)		793	(1,113)
Receivables – from alliance partners		9,613				9,613		$ 9,369
Accounts payable – to alliance partners		2,595				2,595		2,949
BridgeBio
Alliance Statement [Line Items]
Upfront payments made to collaborative partner			$ 90
Consideration for contingent development and regulatory approval			$ 815
Alliance revenues
Alliance Statement [Line Items]
Total Revenues		2,895		2,646		9,794	8,634
Cost of products sold		1,328		1,181		4,456	3,924
Marketing, selling and administrative		(53)		(43)		(160)	(140)
Research and development		6		10		40	17
Acquired IPRD		0		0		100	736
Other (income)/expense, net		(18)		1		(41)	(18)
Receivables – from alliance partners		281				281		320
Accounts payable – to alliance partners		1,242				1,242		1,229
Deferred income from alliances		304				304		$ 330
Alliance revenues | Eisai
Alliance Statement [Line Items]
Upfront payments made to collaborative partner					$ 650
Consideration for contingent development and regulatory approval				2,500
Net product sales
Alliance Statement [Line Items]
Total Revenues		10,813		11,243		33,606	33,446
Net product sales | Alliance revenues
Alliance Statement [Line Items]
Total Revenues		2,722		2,452		9,234	8,139
Alliance revenues | Alliance revenues
Alliance Statement [Line Items]
Total Revenues		$ 173		$ 194		$ 560	$ 495

[1] Excludes amortization of acquired intangible assets