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COMMITMENTS AND CONTINGENCIES (Details)		1 Months Ended				3 Months Ended	12 Months Ended
	Feb. 01, 2022	Mar. 31, 2022 USD ($) patent	Oct. 31, 2021 patent	Apr. 30, 2020 agreement plaintiff	Dec. 31, 2019 USD ($) opposingParty patent	Mar. 31, 2022 USD ($) lawsuit plaintiff	Dec. 31, 2021 USD ($)	Dec. 31, 2016 party
Loss Contingencies [Line Items]
Accrued litigation | $		$ 0				$ 0	$ 1,250,000,000
Number of patents challenged, scenario two					2
Number of patents challenged, scenario one					4
Number of additional patents allegedly infringed			2
Number of patents challenged		3
Number of patents		5
ViiV Healthcare Company
Loss Contingencies [Line Items]
Settlement payment | $						$ 1,250,000,000
Royalty percentage on future sales	3.00%
Loss related to litigation | $							$ 1,250,000,000
Juno Therapeutics, Inc. and Sloan Kettering Cancer Center
Loss Contingencies [Line Items]
Damages awarded | $					$ 585,000,000
Running royalty rate from October 2017					27.60%
Enhancement rate on past damages				50.00%
Running royalty rate on future sales				27.60%
Pre-Exposure Prophylaxis
Loss Contingencies [Line Items]
Number of material transfer agreements | agreement				4
European Patent Claims 2024 Expiration
Loss Contingencies [Line Items]
Number of parties appealed | opposingParty					2
European Patent Claims 2026 Expiration
Loss Contingencies [Line Items]
Number of parties appealed | opposingParty					3
European Patent Claims 2032 Expiration
Loss Contingencies [Line Items]
Number of parties appealed | opposingParty					3
European Patent Claims 2027 Expiration
Loss Contingencies [Line Items]
Number of parties appealed | opposingParty					2
Number of parties filing opposition | party								3
Product Liability
Loss Contingencies [Line Items]
Number of class action lawsuits | lawsuit						1
Number of plaintiffs involved | plaintiff						27,000
Qui Tam
Loss Contingencies [Line Items]
Number of plaintiffs involved | plaintiff				2

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