Product and Geographic Information - Sales of Company's Products (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2023	Jun. 30, 2022	Jun. 30, 2023	Jun. 30, 2022
Revenue from External Customer [Line Items]
Revenues	$ 1,608	$ 1,585	$ 3,146	$ 3,152
Nexplanon/Implanon NXT
Revenue from External Customer [Line Items]
Revenues	214	195	380	366
Follistim AQ
Revenue from External Customer [Line Items]
Revenues	70	58	125	119
NuvaRing
Revenue from External Customer [Line Items]
Revenues	40	42	80	83
Ganirelix Acetate Injection
Revenue from External Customer [Line Items]
Revenues	34	32	63	61
Marvelon/Mercilon
Revenue from External Customer [Line Items]
Revenues	29	31	67	54
Other Womens Health
Revenue from External Customer [Line Items]
Revenues	52	51	105	103
Renflexis
Revenue from External Customer [Line Items]
Revenues	70	59	132	105
Ontruzant
Revenue from External Customer [Line Items]
Revenues	33	35	54	57
Brenzys
Revenue from External Customer [Line Items]
Revenues	13	14	32	28
Aybintio
Revenue from External Customer [Line Items]
Revenues	12	9	22	19
Hadlima
Revenue from External Customer [Line Items]
Revenues	7	2	12	8
Zetia
Revenue from External Customer [Line Items]
Revenues	90	101	173	200
Vytorin
Revenue from External Customer [Line Items]
Revenues	38	35	67	73
Atozet
Revenue from External Customer [Line Items]
Revenues	143	122	271	240
Rosuzet
Revenue from External Customer [Line Items]
Revenues	17	16	35	38
Cozaar/Hyzaar
Revenue from External Customer [Line Items]
Revenues	71	92	156	186
Other Cardiovascular
Revenue from External Customer [Line Items]
Revenues	41	46	82	85
Singulair
Revenue from External Customer [Line Items]
Revenues	80	92	199	222
Nasonex
Revenue from External Customer [Line Items]
Revenues	64	58	133	133
Dulera
Revenue from External Customer [Line Items]
Revenues	48	47	95	88
Clarinex
Revenue from External Customer [Line Items]
Revenues	39	35	79	73
Other Respiratory
Revenue from External Customer [Line Items]
Revenues	19	22	37	45
Arcoxia
Revenue from External Customer [Line Items]
Revenues	72	61	143	121
Fosamax
Revenue from External Customer [Line Items]
Revenues	44	40	82	81
Diprospan
Revenue from External Customer [Line Items]
Revenues	12	31	27	63
Other Non-Opiod Pain, Bone and Dermatology
Revenue from External Customer [Line Items]
Revenues	71	76	133	145
Proscar
Revenue from External Customer [Line Items]
Revenues	25	26	52	50
Propecia
Revenue from External Customer [Line Items]
Revenues	36	35	69	66
Other
Revenue from External Customer [Line Items]
Revenues	84	82	162	164
Other
Revenue from External Customer [Line Items]
Revenues	40	40	79	76
U.S.
Revenue from External Customer [Line Items]
Revenues	371	351	697	680
U.S. | Nexplanon/Implanon NXT
Revenue from External Customer [Line Items]
Revenues	159	134	272	250
U.S. | Follistim AQ
Revenue from External Customer [Line Items]
Revenues	26	23	52	52
U.S. | NuvaRing
Revenue from External Customer [Line Items]
Revenues	17	22	33	38
U.S. | Ganirelix Acetate Injection
Revenue from External Customer [Line Items]
Revenues	4	6	11	14
U.S. | Marvelon/Mercilon
Revenue from External Customer [Line Items]
Revenues	0	0	0	0
U.S. | Other Womens Health
Revenue from External Customer [Line Items]
Revenues	27	29	53	56
U.S. | Renflexis
Revenue from External Customer [Line Items]
Revenues	60	51	114	93
U.S. | Ontruzant
Revenue from External Customer [Line Items]
Revenues	12	12	25	19
U.S. | Brenzys
Revenue from External Customer [Line Items]
Revenues	0	0	0	0
U.S. | Aybintio
Revenue from External Customer [Line Items]
Revenues	0	0	0	0
U.S. | Hadlima
Revenue from External Customer [Line Items]
Revenues	0	0	0	0
U.S. | Zetia
Revenue from External Customer [Line Items]
Revenues	2	2	4	5
U.S. | Vytorin
Revenue from External Customer [Line Items]
Revenues	1	3	3	5
U.S. | Atozet
Revenue from External Customer [Line Items]
Revenues	0	0	0	0
U.S. | Rosuzet
Revenue from External Customer [Line Items]
Revenues	0	0	0	0
U.S. | Cozaar/Hyzaar
Revenue from External Customer [Line Items]
Revenues	2	2	4	10
U.S. | Other Cardiovascular
Revenue from External Customer [Line Items]
Revenues	1	1	1	2
U.S. | Singulair
Revenue from External Customer [Line Items]
Revenues	3	3	5	5
U.S. | Nasonex
Revenue from External Customer [Line Items]
Revenues	0	0	0	9
U.S. | Dulera
Revenue from External Customer [Line Items]
Revenues	38	36	76	67
U.S. | Clarinex
Revenue from External Customer [Line Items]
Revenues	1	1	2	2
U.S. | Other Respiratory
Revenue from External Customer [Line Items]
Revenues	13	11	25	23
U.S. | Arcoxia
Revenue from External Customer [Line Items]
Revenues	0	0	0	0
U.S. | Fosamax
Revenue from External Customer [Line Items]
Revenues	1	1	1	2
U.S. | Diprospan
Revenue from External Customer [Line Items]
Revenues	0	0	0	0
U.S. | Other Non-Opiod Pain, Bone and Dermatology
Revenue from External Customer [Line Items]
Revenues	2	5	7	8
U.S. | Proscar
Revenue from External Customer [Line Items]
Revenues	0	0	1	1
U.S. | Propecia
Revenue from External Customer [Line Items]
Revenues	2	2	4	3
U.S. | Other
Revenue from External Customer [Line Items]
Revenues	2	7	4	15
U.S. | Other
Revenue from External Customer [Line Items]
Revenues	(2)	0	0	1
International
Revenue from External Customer [Line Items]
Revenues	1,237	1,234	2,449	2,472
International | Nexplanon/Implanon NXT
Revenue from External Customer [Line Items]
Revenues	56	61	107	116
International | Follistim AQ
Revenue from External Customer [Line Items]
Revenues	44	35	73	66
International | NuvaRing
Revenue from External Customer [Line Items]
Revenues	23	20	47	45
International | Ganirelix Acetate Injection
Revenue from External Customer [Line Items]
Revenues	29	25	53	47
International | Marvelon/Mercilon
Revenue from External Customer [Line Items]
Revenues	29	31	67	54
International | Other Womens Health
Revenue from External Customer [Line Items]
Revenues	25	22	52	47
International | Renflexis
Revenue from External Customer [Line Items]
Revenues	11	8	18	12
International | Ontruzant
Revenue from External Customer [Line Items]
Revenues	21	23	29	38
International | Brenzys
Revenue from External Customer [Line Items]
Revenues	13	14	32	28
International | Aybintio
Revenue from External Customer [Line Items]
Revenues	12	9	22	19
International | Hadlima
Revenue from External Customer [Line Items]
Revenues	7	2	12	8
International | Zetia
Revenue from External Customer [Line Items]
Revenues	89	99	169	195
International | Vytorin
Revenue from External Customer [Line Items]
Revenues	37	32	65	68
International | Atozet
Revenue from External Customer [Line Items]
Revenues	143	122	271	240
International | Rosuzet
Revenue from External Customer [Line Items]
Revenues	17	16	35	38
International | Cozaar/Hyzaar
Revenue from External Customer [Line Items]
Revenues	69	91	152	176
International | Other Cardiovascular
Revenue from External Customer [Line Items]
Revenues	41	45	81	83
International | Singulair
Revenue from External Customer [Line Items]
Revenues	77	89	194	216
International | Nasonex
Revenue from External Customer [Line Items]
Revenues	64	58	133	123
International | Dulera
Revenue from External Customer [Line Items]
Revenues	10	12	18	21
International | Clarinex
Revenue from External Customer [Line Items]
Revenues	38	34	77	70
International | Other Respiratory
Revenue from External Customer [Line Items]
Revenues	6	11	12	22
International | Arcoxia
Revenue from External Customer [Line Items]
Revenues	72	61	143	121
International | Fosamax
Revenue from External Customer [Line Items]
Revenues	44	39	81	79
International | Diprospan
Revenue from External Customer [Line Items]
Revenues	12	31	27	63
International | Other Non-Opiod Pain, Bone and Dermatology
Revenue from External Customer [Line Items]
Revenues	67	71	127	137
International | Proscar
Revenue from External Customer [Line Items]
Revenues	24	26	51	50
International | Propecia
Revenue from External Customer [Line Items]
Revenues	35	33	66	63
International | Other
Revenue from External Customer [Line Items]
Revenues	81	74	156	149
International | Other
Revenue from External Customer [Line Items]
Revenues	$ 41	$ 40	$ 79	$ 78