Product and Geographic Information - Sales of Company's Products (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2022	Jun. 30, 2021	Jun. 30, 2022	Jun. 30, 2021
Revenue from External Customer [Line Items]
Revenues	$ 1,585	$ 1,595	$ 3,152	$ 3,101
Nexplanon/Implanon NXT
Revenue from External Customer [Line Items]
Revenues	195	184	366	368
Follistim AQ
Revenue from External Customer [Line Items]
Revenues	58	65	119	117
NuvaRing
Revenue from External Customer [Line Items]
Revenues	42	53	83	98
Ganirelix Acetate Injection
Revenue from External Customer [Line Items]
Revenues	32	31	61	60
Cerazette
Revenue from External Customer [Line Items]
Revenues	15	18	32	34
Other Womens Health
Revenue from External Customer [Line Items]
Revenues	67	66	125	139
Renflexis
Revenue from External Customer [Line Items]
Revenues	59	43	105	81
Ontruzant
Revenue from External Customer [Line Items]
Revenues	35	22	57	45
Brenzys
Revenue from External Customer [Line Items]
Revenues	14	11	28	21
Aybintio
Revenue from External Customer [Line Items]
Revenues	9	8	19	16
Hadlima
Revenue from External Customer [Line Items]
Revenues	2	2	8	4
Zetia
Revenue from External Customer [Line Items]
Revenues	101	99	200	190
Vytorin
Revenue from External Customer [Line Items]
Revenues	35	45	73	86
Atozet
Revenue from External Customer [Line Items]
Revenues	122	121	240	233
Rosuzet
Revenue from External Customer [Line Items]
Revenues	16	18	38	33
Cozaar/Hyzaar
Revenue from External Customer [Line Items]
Revenues	92	86	186	177
Other Cardiovascular
Revenue from External Customer [Line Items]
Revenues	46	61	85	100
Singulair
Revenue from External Customer [Line Items]
Revenues	92	92	222	199
Nasonex
Revenue from External Customer [Line Items]
Revenues	58	52	133	95
Dulera
Revenue from External Customer [Line Items]
Revenues	47	52	88	91
Clarinex
Revenue from External Customer [Line Items]
Revenues	35	30	73	55
Other Respiratory
Revenue from External Customer [Line Items]
Revenues	22	22	45	44
Arcoxia
Revenue from External Customer [Line Items]
Revenues	61	62	121	119
Fosamax
Revenue from External Customer [Line Items]
Revenues	40	49	81	86
Diprospan
Revenue from External Customer [Line Items]
Revenues	31	32	63	57
Other Non-Opiod Pain, Bone and Dermatology
Revenue from External Customer [Line Items]
Revenues	76	75	145	136
Proscar
Revenue from External Customer [Line Items]
Revenues	26	32	50	64
Propecia
Revenue from External Customer [Line Items]
Revenues	35	36	66	67
Other
Revenue from External Customer [Line Items]
Revenues	82	81	164	169
Other
Revenue from External Customer [Line Items]
Revenues	40	47	76	117
U.S.
Revenue from External Customer [Line Items]
Revenues	351	339	680	690
U.S. | Nexplanon/Implanon NXT
Revenue from External Customer [Line Items]
Revenues	134	129	250	269
U.S. | Follistim AQ
Revenue from External Customer [Line Items]
Revenues	23	27	52	52
U.S. | NuvaRing
Revenue from External Customer [Line Items]
Revenues	22	26	38	47
U.S. | Ganirelix Acetate Injection
Revenue from External Customer [Line Items]
Revenues	6	5	14	14
U.S. | Cerazette
Revenue from External Customer [Line Items]
Revenues	0	0	0	0
U.S. | Other Womens Health
Revenue from External Customer [Line Items]
Revenues	29	23	56	63
U.S. | Renflexis
Revenue from External Customer [Line Items]
Revenues	51	36	93	70
U.S. | Ontruzant
Revenue from External Customer [Line Items]
Revenues	12	7	19	11
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	5	4
U.S. | Vytorin
Revenue from External Customer [Line Items]
Revenues	3	2	5	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	10	6
U.S. | Other Cardiovascular
Revenue from External Customer [Line Items]
Revenues	1	1	2	2
U.S. | Singulair
Revenue from External Customer [Line Items]
Revenues	3	3	5	8
U.S. | Nasonex
Revenue from External Customer [Line Items]
Revenues	0	1	9	3
U.S. | Dulera
Revenue from External Customer [Line Items]
Revenues	36	42	67	73
U.S. | Clarinex
Revenue from External Customer [Line Items]
Revenues	1	2	2	3
U.S. | Other Respiratory
Revenue from External Customer [Line Items]
Revenues	11	13	23	29
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	2	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	5	4	8	3
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	3	4
U.S. | Other
Revenue from External Customer [Line Items]
Revenues	7	13	15	24
U.S. | Other
Revenue from External Customer [Line Items]
Revenues	0	(2)	1	(3)
International
Revenue from External Customer [Line Items]
Revenues	1,234	1,257	2,472	2,412
International | Nexplanon/Implanon NXT
Revenue from External Customer [Line Items]
Revenues	61	56	116	98
International | Follistim AQ
Revenue from External Customer [Line Items]
Revenues	35	38	66	65
International | NuvaRing
Revenue from External Customer [Line Items]
Revenues	20	28	45	52
International | Ganirelix Acetate Injection
Revenue from External Customer [Line Items]
Revenues	25	25	47	46
International | Cerazette
Revenue from External Customer [Line Items]
Revenues	15	18	32	34
International | Other Womens Health
Revenue from External Customer [Line Items]
Revenues	38	43	69	76
International | Renflexis
Revenue from External Customer [Line Items]
Revenues	8	7	12	11
International | Ontruzant
Revenue from External Customer [Line Items]
Revenues	23	15	38	34
International | Brenzys
Revenue from External Customer [Line Items]
Revenues	14	11	28	21
International | Aybintio
Revenue from External Customer [Line Items]
Revenues	9	8	19	16
International | Hadlima
Revenue from External Customer [Line Items]
Revenues	2	2	8	4
International | Zetia
Revenue from External Customer [Line Items]
Revenues	99	97	195	186
International | Vytorin
Revenue from External Customer [Line Items]
Revenues	32	42	68	81
International | Atozet
Revenue from External Customer [Line Items]
Revenues	122	121	240	233
International | Rosuzet
Revenue from External Customer [Line Items]
Revenues	16	18	38	33
International | Cozaar/Hyzaar
Revenue from External Customer [Line Items]
Revenues	91	84	176	171
International | Other Cardiovascular
Revenue from External Customer [Line Items]
Revenues	45	60	83	98
International | Singulair
Revenue from External Customer [Line Items]
Revenues	89	89	216	191
International | Nasonex
Revenue from External Customer [Line Items]
Revenues	58	51	123	92
International | Dulera
Revenue from External Customer [Line Items]
Revenues	12	10	21	18
International | Clarinex
Revenue from External Customer [Line Items]
Revenues	34	29	70	52
International | Other Respiratory
Revenue from External Customer [Line Items]
Revenues	11	9	22	15
International | Arcoxia
Revenue from External Customer [Line Items]
Revenues	61	62	121	119
International | Fosamax
Revenue from External Customer [Line Items]
Revenues	39	48	79	85
International | Diprospan
Revenue from External Customer [Line Items]
Revenues	31	32	63	57
International | Other Non-Opiod Pain, Bone and Dermatology
Revenue from External Customer [Line Items]
Revenues	71	72	137	133
International | Proscar
Revenue from External Customer [Line Items]
Revenues	26	31	50	63
International | Propecia
Revenue from External Customer [Line Items]
Revenues	33	34	63	63
International | Other
Revenue from External Customer [Line Items]
Revenues	74	68	149	146
International | Other
Revenue from External Customer [Line Items]
Revenues	$ 40	$ 49	$ 78	$ 119