Product and Geographic Information - Sales of Company's Products (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2023	Mar. 31, 2022
Revenue from External Customer [Line Items]
Revenues	$ 1,538	$ 1,567
Nexplanon/Implanon NXT
Revenue from External Customer [Line Items]
Revenues	165	171
Follistim AQ
Revenue from External Customer [Line Items]
Revenues	55	61
NuvaRing
Revenue from External Customer [Line Items]
Revenues	40	41
Ganirelix Acetate Injection
Revenue from External Customer [Line Items]
Revenues	30	30
Marvelon/Mercilon
Revenue from External Customer [Line Items]
Revenues	37	24
Other Womens Health
Revenue from External Customer [Line Items]
Revenues	54	52
Renflexis
Revenue from External Customer [Line Items]
Revenues	62	46
Ontruzant
Revenue from External Customer [Line Items]
Revenues	21	22
Brenzys
Revenue from External Customer [Line Items]
Revenues	19	14
Aybintio
Revenue from External Customer [Line Items]
Revenues	10	10
Hadlima
Revenue from External Customer [Line Items]
Revenues	5	6
Zetia
Revenue from External Customer [Line Items]
Revenues	83	99
Vytorin
Revenue from External Customer [Line Items]
Revenues	29	38
Atozet
Revenue from External Customer [Line Items]
Revenues	128	119
Rosuzet
Revenue from External Customer [Line Items]
Revenues	18	22
Cozaar/Hyzaar
Revenue from External Customer [Line Items]
Revenues	85	93
Other Cardiovascular
Revenue from External Customer [Line Items]
Revenues	41	39
Singulair
Revenue from External Customer [Line Items]
Revenues	120	130
Nasonex
Revenue from External Customer [Line Items]
Revenues	69	75
Dulera
Revenue from External Customer [Line Items]
Revenues	46	40
Clarinex
Revenue from External Customer [Line Items]
Revenues	39	38
Other Respiratory
Revenue from External Customer [Line Items]
Revenues	17	22
Arcoxia
Revenue from External Customer [Line Items]
Revenues	71	60
Fosamax
Revenue from External Customer [Line Items]
Revenues	38	41
Diprospan
Revenue from External Customer [Line Items]
Revenues	14	31
Other Non-Opiod Pain, Bone and Dermatology
Revenue from External Customer [Line Items]
Revenues	63	69
Proscar
Revenue from External Customer [Line Items]
Revenues	27	24
Propecia
Revenue from External Customer [Line Items]
Revenues	33	30
Other
Revenue from External Customer [Line Items]
Revenues	80	83
Other
Revenue from External Customer [Line Items]
Revenues	39	37
U.S.
Revenue from External Customer [Line Items]
Revenues	326	329
U.S. | Nexplanon/Implanon NXT
Revenue from External Customer [Line Items]
Revenues	114	116
U.S. | Follistim AQ
Revenue from External Customer [Line Items]
Revenues	26	30
U.S. | NuvaRing
Revenue from External Customer [Line Items]
Revenues	15	16
U.S. | Ganirelix Acetate Injection
Revenue from External Customer [Line Items]
Revenues	6	8
U.S. | Marvelon/Mercilon
Revenue from External Customer [Line Items]
Revenues	0	0
U.S. | Other Womens Health
Revenue from External Customer [Line Items]
Revenues	26	27
U.S. | Renflexis
Revenue from External Customer [Line Items]
Revenues	55	42
U.S. | Ontruzant
Revenue from External Customer [Line Items]
Revenues	13	7
U.S. | Brenzys
Revenue from External Customer [Line Items]
Revenues	0	0
U.S. | Aybintio
Revenue from External Customer [Line Items]
Revenues	0	0
U.S. | Hadlima
Revenue from External Customer [Line Items]
Revenues	0	0
U.S. | Zetia
Revenue from External Customer [Line Items]
Revenues	2	3
U.S. | Vytorin
Revenue from External Customer [Line Items]
Revenues	2	2
U.S. | Atozet
Revenue from External Customer [Line Items]
Revenues	0	0
U.S. | Rosuzet
Revenue from External Customer [Line Items]
Revenues	0	0
U.S. | Cozaar/Hyzaar
Revenue from External Customer [Line Items]
Revenues	2	8
U.S. | Other Cardiovascular
Revenue from External Customer [Line Items]
Revenues	1	1
U.S. | Singulair
Revenue from External Customer [Line Items]
Revenues	3	3
U.S. | Nasonex
Revenue from External Customer [Line Items]
Revenues	0	9
U.S. | Dulera
Revenue from External Customer [Line Items]
Revenues	38	31
U.S. | Clarinex
Revenue from External Customer [Line Items]
Revenues	1	1
U.S. | Other Respiratory
Revenue from External Customer [Line Items]
Revenues	12	12
U.S. | Arcoxia
Revenue from External Customer [Line Items]
Revenues	0	0
U.S. | Fosamax
Revenue from External Customer [Line Items]
Revenues	0	1
U.S. | Diprospan
Revenue from External Customer [Line Items]
Revenues	0	0
U.S. | Other Non-Opiod Pain, Bone and Dermatology
Revenue from External Customer [Line Items]
Revenues	4	3
U.S. | Proscar
Revenue from External Customer [Line Items]
Revenues	0	0
U.S. | Propecia
Revenue from External Customer [Line Items]
Revenues	2	1
U.S. | Other
Revenue from External Customer [Line Items]
Revenues	4	8
U.S. | Other
Revenue from External Customer [Line Items]
Revenues	0	0
International
Revenue from External Customer [Line Items]
Revenues	1,212	1,238
International | Nexplanon/Implanon NXT
Revenue from External Customer [Line Items]
Revenues	52	55
International | Follistim AQ
Revenue from External Customer [Line Items]
Revenues	29	31
International | NuvaRing
Revenue from External Customer [Line Items]
Revenues	24	24
International | Ganirelix Acetate Injection
Revenue from External Customer [Line Items]
Revenues	23	22
International | Marvelon/Mercilon
Revenue from External Customer [Line Items]
Revenues	37	24
International | Other Womens Health
Revenue from External Customer [Line Items]
Revenues	28	26
International | Renflexis
Revenue from External Customer [Line Items]
Revenues	7	4
International | Ontruzant
Revenue from External Customer [Line Items]
Revenues	8	15
International | Brenzys
Revenue from External Customer [Line Items]
Revenues	19	14
International | Aybintio
Revenue from External Customer [Line Items]
Revenues	10	10
International | Hadlima
Revenue from External Customer [Line Items]
Revenues	5	6
International | Zetia
Revenue from External Customer [Line Items]
Revenues	81	96
International | Vytorin
Revenue from External Customer [Line Items]
Revenues	28	36
International | Atozet
Revenue from External Customer [Line Items]
Revenues	128	119
International | Rosuzet
Revenue from External Customer [Line Items]
Revenues	18	22
International | Cozaar/Hyzaar
Revenue from External Customer [Line Items]
Revenues	83	86
International | Other Cardiovascular
Revenue from External Customer [Line Items]
Revenues	40	38
International | Singulair
Revenue from External Customer [Line Items]
Revenues	117	127
International | Nasonex
Revenue from External Customer [Line Items]
Revenues	69	65
International | Dulera
Revenue from External Customer [Line Items]
Revenues	8	9
International | Clarinex
Revenue from External Customer [Line Items]
Revenues	39	37
International | Other Respiratory
Revenue from External Customer [Line Items]
Revenues	5	11
International | Arcoxia
Revenue from External Customer [Line Items]
Revenues	71	60
International | Fosamax
Revenue from External Customer [Line Items]
Revenues	37	40
International | Diprospan
Revenue from External Customer [Line Items]
Revenues	14	31
International | Other Non-Opiod Pain, Bone and Dermatology
Revenue from External Customer [Line Items]
Revenues	59	66
International | Proscar
Revenue from External Customer [Line Items]
Revenues	27	24
International | Propecia
Revenue from External Customer [Line Items]
Revenues	31	29
International | Other
Revenue from External Customer [Line Items]
Revenues	76	74
International | Other
Revenue from External Customer [Line Items]
Revenues	$ 39	$ 37