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Segments of Business and Geographic Areas - Sales by Segment of Business (Details) - USD ($)
$ in Millions
 12 Months Ended
Jan. 01, 2023
Jan. 02, 2022
Jan. 03, 2021
Segment Reporting Information [Line Items]      
Sales to Customers $ 94,943 $ 93,775 $ 82,584
Percentage Change In Sales By Segment Of Business 1.30% 13.60%  
Consumer Health      
Segment Reporting Information [Line Items]      
Sales to Customers $ 14,953 $ 15,035 14,450
Percentage Change In Sales By Segment Of Business (0.50%) 4.00%  
Pharmaceutical      
Segment Reporting Information [Line Items]      
Sales to Customers $ 52,563 $ 51,680 45,175
Percentage Change In Sales By Segment Of Business 1.70% 14.40%  
Pharmaceutical | Immunology      
Segment Reporting Information [Line Items]      
Sales to Customers $ 16,935 $ 16,750 15,055
Percentage Change In Sales By Segment Of Business 1.10% 11.30%  
Pharmaceutical | Infectious Diseases      
Segment Reporting Information [Line Items]      
Sales to Customers $ 5,449 $ 5,825 3,543
Percentage Change In Sales By Segment Of Business (6.50%) 64.40%  
Pharmaceutical | Neuroscience      
Segment Reporting Information [Line Items]      
Sales to Customers $ 6,893 $ 6,988 6,526
Percentage Change In Sales By Segment Of Business (1.40%) 7.10%  
Pharmaceutical | Oncology      
Segment Reporting Information [Line Items]      
Sales to Customers $ 15,983 $ 14,548 12,367
Percentage Change In Sales By Segment Of Business 9.90% 17.60%  
Pharmaceutical | Pulmonary Hypertension      
Segment Reporting Information [Line Items]      
Sales to Customers $ 3,417 $ 3,450 3,148
Percentage Change In Sales By Segment Of Business (1.00%) 9.60%  
Pharmaceutical | Cardiovascular/Metabolism/Other      
Segment Reporting Information [Line Items]      
Sales to Customers $ 3,887 $ 4,119 4,534
Percentage Change In Sales By Segment Of Business (5.60%) (9.20%)  
Medical Devices      
Segment Reporting Information [Line Items]      
Sales to Customers $ 27,427 $ 27,060 22,959
Percentage Change In Sales By Segment Of Business 1.40% 17.90%  
Medical Devices | Interventional Solutions      
Segment Reporting Information [Line Items]      
Sales to Customers $ 4,300 $ 3,971 3,046
Percentage Change In Sales By Segment Of Business 8.30% 30.40%  
Medical Devices | Orthopaedics      
Segment Reporting Information [Line Items]      
Sales to Customers $ 8,587 $ 8,588 7,763
Percentage Change In Sales By Segment Of Business 0.00% 10.60%  
Medical Devices | Surgery      
Segment Reporting Information [Line Items]      
Sales to Customers $ 9,690 $ 9,812 8,232
Percentage Change In Sales By Segment Of Business (1.20%) 19.20%  
Medical Devices | Vision      
Segment Reporting Information [Line Items]      
Sales to Customers $ 4,849 $ 4,688 3,919
Percentage Change In Sales By Segment Of Business 3.40% 19.60%  
OTC | Consumer Health      
Segment Reporting Information [Line Items]      
Sales to Customers $ 6,031 $ 5,627 5,221
Percentage Change In Sales By Segment Of Business 7.20% 7.80%  
Skin health/Beauty | Consumer Health      
Segment Reporting Information [Line Items]      
Sales to Customers $ 4,352 $ 4,541 4,450
Percentage Change In Sales By Segment Of Business (4.20%) 2.00%  
Oral Care | Consumer Health      
Segment Reporting Information [Line Items]      
Sales to Customers $ 1,505 $ 1,645 1,641
Percentage Change In Sales By Segment Of Business (8.50%) 0.20%  
Baby Care | Consumer Health      
Segment Reporting Information [Line Items]      
Sales to Customers $ 1,461 $ 1,566 1,517
Percentage Change In Sales By Segment Of Business (6.70%) 3.20%  
Women's Health | Consumer Health      
Segment Reporting Information [Line Items]      
Sales to Customers $ 904 $ 917 901
Percentage Change In Sales By Segment Of Business (1.50%) 1.80%  
Wound Care and Other | Consumer Health      
Segment Reporting Information [Line Items]      
Sales to Customers $ 700 $ 739 720
Percentage Change In Sales By Segment Of Business (5.30%) 2.60%  
Remicade | Pharmaceutical | Immunology      
Segment Reporting Information [Line Items]      
Sales to Customers $ 2,343 $ 3,190 3,747
Percentage Change In Sales By Segment Of Business (26.60%) (14.90%)  
Simponi/Simponi Aria | Pharmaceutical | Immunology      
Segment Reporting Information [Line Items]      
Sales to Customers $ 2,184 $ 2,276 2,243
Percentage Change In Sales By Segment Of Business (4.00%) 1.40%  
Stelara | Pharmaceutical | Immunology      
Segment Reporting Information [Line Items]      
Sales to Customers $ 9,723 $ 9,134 7,707
Percentage Change In Sales By Segment Of Business 6.50% 18.50%  
Tremfya | Pharmaceutical | Immunology      
Segment Reporting Information [Line Items]      
Sales to Customers $ 2,668 $ 2,127 1,347
Percentage Change In Sales By Segment Of Business 25.40% 57.90%  
Other Immunology | Pharmaceutical | Immunology      
Segment Reporting Information [Line Items]      
Sales to Customers $ 17 $ 24 11
Percentage Change In Sales By Segment Of Business (28.20%)    
COVID-19 | Pharmaceutical | Infectious Diseases      
Segment Reporting Information [Line Items]      
Sales to Customers $ 2,179 2,385 0
Percentage Change In Sales By Segment Of Business (8.60%)    
EDURANT/rilpivirine | Pharmaceutical | Infectious Diseases      
Segment Reporting Information [Line Items]      
Sales to Customers $ 1,008 $ 994 964
Percentage Change In Sales By Segment Of Business 1.50% 3.10%  
PREZISTA/PREZCOBIX/REZOLSTA/SYMTUZA | Pharmaceutical | Infectious Diseases      
Segment Reporting Information [Line Items]      
Sales to Customers $ 1,943 $ 2,083 2,184
Percentage Change In Sales By Segment Of Business (6.70%) (4.60%)  
Other Infectious Diseases | Pharmaceutical | Infectious Diseases      
Segment Reporting Information [Line Items]      
Sales to Customers $ 318 $ 363 396
Percentage Change In Sales By Segment Of Business (12.30%) (8.30%)  
CONCERTA/Methylphenidate | Pharmaceutical | Neuroscience      
Segment Reporting Information [Line Items]      
Sales to Customers $ 644 $ 667 622
Percentage Change In Sales By Segment Of Business (3.50%) 7.30%  
INVEGA SUSTENNA/XEPLION/TRINZA/TREVICTA | Pharmaceutical | Neuroscience      
Segment Reporting Information [Line Items]      
Sales to Customers $ 4,140 $ 4,022 3,653
Percentage Change In Sales By Segment Of Business 3.00% 10.10%  
RISPERDAL CONSTA | Pharmaceutical | Neuroscience      
Segment Reporting Information [Line Items]      
Sales to Customers $ 485 $ 592 642
Percentage Change In Sales By Segment Of Business (18.10%) (7.70%)  
OTHER NEUROSCIENCE | Pharmaceutical | Neuroscience      
Segment Reporting Information [Line Items]      
Sales to Customers $ 1,623 $ 1,706 1,610
Percentage Change In Sales By Segment Of Business (4.90%) 6.00%  
DARZALEX | Pharmaceutical | Oncology      
Segment Reporting Information [Line Items]      
Sales to Customers $ 7,977 $ 6,023 4,190
Percentage Change In Sales By Segment Of Business 32.40% 43.80%  
ERLEADA | Pharmaceutical | Oncology      
Segment Reporting Information [Line Items]      
Sales to Customers $ 1,881 $ 1,291 760
Percentage Change In Sales By Segment Of Business 45.70% 70.00%  
IMBRUVICA | Pharmaceutical | Oncology      
Segment Reporting Information [Line Items]      
Sales to Customers $ 3,784 $ 4,369 4,128
Percentage Change In Sales By Segment Of Business (13.40%) 5.80%  
ZYTIGA/abiraterone acetate | Pharmaceutical | Oncology      
Segment Reporting Information [Line Items]      
Sales to Customers $ 1,770 $ 2,297 2,470
Percentage Change In Sales By Segment Of Business (22.90%) (7.00%)  
Other Oncology | Pharmaceutical | Oncology      
Segment Reporting Information [Line Items]      
Sales to Customers $ 571 $ 568 821
Percentage Change In Sales By Segment Of Business 0.60% (30.80%)  
OPSUMIT | Pharmaceutical | Pulmonary Hypertension      
Segment Reporting Information [Line Items]      
Sales to Customers $ 1,783 $ 1,819 1,639
Percentage Change In Sales By Segment Of Business (2.00%) 11.00%  
UPTRAVI | Pharmaceutical | Pulmonary Hypertension      
Segment Reporting Information [Line Items]      
Sales to Customers $ 1,322 $ 1,237 1,093
Percentage Change In Sales By Segment Of Business 6.90% 13.10%  
Other | Pharmaceutical | Pulmonary Hypertension      
Segment Reporting Information [Line Items]      
Sales to Customers $ 313 $ 395 416
Percentage Change In Sales By Segment Of Business (20.80%) (5.00%)  
Other | Pharmaceutical | Cardiovascular/Metabolism/Other      
Segment Reporting Information [Line Items]      
Sales to Customers $ 966 $ 1,119 1,394
Percentage Change In Sales By Segment Of Business (13.60%) (19.70%)  
XARELTO | Pharmaceutical | Cardiovascular/Metabolism/Other      
Segment Reporting Information [Line Items]      
Sales to Customers $ 2,473 $ 2,438 2,345
Percentage Change In Sales By Segment Of Business 1.40% 4.00%  
INVOKANA/INVOKAMET | Pharmaceutical | Cardiovascular/Metabolism/Other      
Segment Reporting Information [Line Items]      
Sales to Customers $ 448 $ 563 795
Percentage Change In Sales By Segment Of Business (20.40%) (29.30%)  
HIPS | Medical Devices | Orthopaedics      
Segment Reporting Information [Line Items]      
Sales to Customers $ 1,514 $ 1,480 1,280
Percentage Change In Sales By Segment Of Business 2.30% 15.60%  
KNEES | Medical Devices | Orthopaedics      
Segment Reporting Information [Line Items]      
Sales to Customers $ 1,359 $ 1,325 1,170
Percentage Change In Sales By Segment Of Business 2.60% 13.30%  
TRAUMA | Medical Devices | Orthopaedics      
Segment Reporting Information [Line Items]      
Sales to Customers $ 2,871 $ 2,885 2,614
Percentage Change In Sales By Segment Of Business (0.50%) 10.40%  
SPINE,SPORTS & OTHER | Medical Devices | Orthopaedics      
Segment Reporting Information [Line Items]      
Sales to Customers $ 2,843 $ 2,898 2,699
Percentage Change In Sales By Segment Of Business (1.90%) 7.40%  
ADVANCED | Medical Devices | Surgery      
Segment Reporting Information [Line Items]      
Sales to Customers $ 4,569 $ 4,622 3,839
Percentage Change In Sales By Segment Of Business (1.10%) 20.40%  
GENERAL | Medical Devices | Surgery      
Segment Reporting Information [Line Items]      
Sales to Customers $ 5,121 $ 5,190 4,392
Percentage Change In Sales By Segment Of Business (1.30%) 18.10%  
CONTACT LENSES/OTHER | Medical Devices | Vision      
Segment Reporting Information [Line Items]      
Sales to Customers $ 3,543 $ 3,440 2,994
Percentage Change In Sales By Segment Of Business 3.00% 14.90%  
SURGICAL | Medical Devices | Vision      
Segment Reporting Information [Line Items]      
Sales to Customers $ 1,306 $ 1,248 925
Percentage Change In Sales By Segment Of Business 4.60% 34.90%  
United States      
Segment Reporting Information [Line Items]      
Sales to Customers $ 48,580 $ 47,156 43,133
Percentage Change In Sales By Segment Of Business 3.00% 9.30%  
United States | Consumer Health      
Segment Reporting Information [Line Items]      
Sales to Customers $ 6,599 $ 6,516 6,362
Percentage Change In Sales By Segment Of Business 1.30% 2.40%  
United States | Pharmaceutical      
Segment Reporting Information [Line Items]      
Sales to Customers $ 28,604 $ 27,954 25,735
Percentage Change In Sales By Segment Of Business 2.30% 8.60%  
United States | Pharmaceutical | Immunology      
Segment Reporting Information [Line Items]      
Sales to Customers $ 11,036 $ 10,843 10,175
Percentage Change In Sales By Segment Of Business 1.80% 6.60%  
United States | Pharmaceutical | Infectious Diseases      
Segment Reporting Information [Line Items]      
Sales to Customers $ 1,680 $ 2,249 1,735
Percentage Change In Sales By Segment Of Business (25.30%) 29.70%  
United States | Pharmaceutical | Neuroscience      
Segment Reporting Information [Line Items]      
Sales to Customers $ 3,570 $ 3,347 3,091
Percentage Change In Sales By Segment Of Business 6.70% 8.30%  
United States | Pharmaceutical | Oncology      
Segment Reporting Information [Line Items]      
Sales to Customers $ 6,930 $ 5,958 5,092
Percentage Change In Sales By Segment Of Business 16.30% 17.00%  
United States | Pharmaceutical | Pulmonary Hypertension      
Segment Reporting Information [Line Items]      
Sales to Customers $ 2,346 $ 2,365 2,133
Percentage Change In Sales By Segment Of Business (0.80%) 10.90%  
United States | Pharmaceutical | Cardiovascular/Metabolism/Other      
Segment Reporting Information [Line Items]      
Sales to Customers $ 3,042 $ 3,192 3,509
Percentage Change In Sales By Segment Of Business (4.70%) (9.00%)  
United States | Medical Devices      
Segment Reporting Information [Line Items]      
Sales to Customers $ 13,377 $ 12,686 11,036
Percentage Change In Sales By Segment Of Business 5.40% 14.90%  
United States | Medical Devices | Interventional Solutions      
Segment Reporting Information [Line Items]      
Sales to Customers $ 2,169 $ 1,836 1,452
Percentage Change In Sales By Segment Of Business 18.20% 26.40%  
United States | Medical Devices | Orthopaedics      
Segment Reporting Information [Line Items]      
Sales to Customers $ 5,321 $ 5,126 4,779
Percentage Change In Sales By Segment Of Business 3.80% 7.30%  
United States | Medical Devices | Surgery      
Segment Reporting Information [Line Items]      
Sales to Customers $ 3,897 $ 3,867 3,249
Percentage Change In Sales By Segment Of Business 0.80% 19.00%  
United States | Medical Devices | Vision      
Segment Reporting Information [Line Items]      
Sales to Customers $ 1,990 $ 1,857 1,557
Percentage Change In Sales By Segment Of Business 7.20% 19.30%  
United States | OTC | Consumer Health      
Segment Reporting Information [Line Items]      
Sales to Customers $ 2,782 $ 2,594 2,460
Percentage Change In Sales By Segment Of Business 7.30% 5.40%  
United States | Skin health/Beauty | Consumer Health      
Segment Reporting Information [Line Items]      
Sales to Customers $ 2,337 $ 2,400 2,350
Percentage Change In Sales By Segment Of Business (2.60%) 2.10%  
United States | Oral Care | Consumer Health      
Segment Reporting Information [Line Items]      
Sales to Customers $ 635 $ 637 683
Percentage Change In Sales By Segment Of Business (0.30%) (6.70%)  
United States | Baby Care | Consumer Health      
Segment Reporting Information [Line Items]      
Sales to Customers $ 357 $ 378 376
Percentage Change In Sales By Segment Of Business (5.50%) 0.50%  
United States | Women's Health | Consumer Health      
Segment Reporting Information [Line Items]      
Sales to Customers $ 13 $ 13 13
Percentage Change In Sales By Segment Of Business 1.70% (1.60%)  
United States | Wound Care and Other | Consumer Health      
Segment Reporting Information [Line Items]      
Sales to Customers $ 475 $ 495 480
Percentage Change In Sales By Segment Of Business (4.00%) 3.10%  
United States | Remicade | Pharmaceutical | Immunology      
Segment Reporting Information [Line Items]      
Sales to Customers $ 1,417 $ 2,019 2,508
Percentage Change In Sales By Segment Of Business (29.80%) (19.50%)  
United States | Simponi/Simponi Aria | Pharmaceutical | Immunology      
Segment Reporting Information [Line Items]      
Sales to Customers $ 1,166 $ 1,127 1,155
Percentage Change In Sales By Segment Of Business 3.50% (2.40%)  
United States | Stelara | Pharmaceutical | Immunology      
Segment Reporting Information [Line Items]      
Sales to Customers $ 6,388 $ 5,938 5,240
Percentage Change In Sales By Segment Of Business 7.60% 13.30%  
United States | Tremfya | Pharmaceutical | Immunology      
Segment Reporting Information [Line Items]      
Sales to Customers $ 1,844 $ 1,503 926
Percentage Change In Sales By Segment Of Business 22.70% 62.30%  
United States | Other Immunology | Pharmaceutical | Immunology      
Segment Reporting Information [Line Items]      
Sales to Customers $ 17 $ 21 0
Percentage Change In Sales By Segment Of Business (18.40%)    
United States | COVID-19 | Pharmaceutical | Infectious Diseases      
Segment Reporting Information [Line Items]      
Sales to Customers $ 120 634 0
Percentage Change In Sales By Segment Of Business (81.10%)    
United States | EDURANT/rilpivirine | Pharmaceutical | Infectious Diseases      
Segment Reporting Information [Line Items]      
Sales to Customers $ 36 $ 41 44
Percentage Change In Sales By Segment Of Business (10.80%) (7.60%)  
United States | PREZISTA/PREZCOBIX/REZOLSTA/SYMTUZA | Pharmaceutical | Infectious Diseases      
Segment Reporting Information [Line Items]      
Sales to Customers $ 1,494 $ 1,508 1,587
Percentage Change In Sales By Segment Of Business (1.00%) (4.90%)  
United States | Other Infectious Diseases | Pharmaceutical | Infectious Diseases      
Segment Reporting Information [Line Items]      
Sales to Customers $ 30 $ 66 104
Percentage Change In Sales By Segment Of Business (55.50%) (36.00%)  
United States | CONCERTA/Methylphenidate | Pharmaceutical | Neuroscience      
Segment Reporting Information [Line Items]      
Sales to Customers $ 151 $ 172 183
Percentage Change In Sales By Segment Of Business (12.50%) (5.80%)  
United States | INVEGA SUSTENNA/XEPLION/TRINZA/TREVICTA | Pharmaceutical | Neuroscience      
Segment Reporting Information [Line Items]      
Sales to Customers $ 2,714 $ 2,550 2,314
Percentage Change In Sales By Segment Of Business 6.50% 10.20%  
United States | RISPERDAL CONSTA | Pharmaceutical | Neuroscience      
Segment Reporting Information [Line Items]      
Sales to Customers $ 257 $ 287 296
Percentage Change In Sales By Segment Of Business (10.40%) (2.90%)  
United States | OTHER NEUROSCIENCE | Pharmaceutical | Neuroscience      
Segment Reporting Information [Line Items]      
Sales to Customers $ 447 $ 338 298
Percentage Change In Sales By Segment Of Business 32.40% 13.30%  
United States | DARZALEX | Pharmaceutical | Oncology      
Segment Reporting Information [Line Items]      
Sales to Customers $ 4,210 $ 3,169 2,232
Percentage Change In Sales By Segment Of Business 32.80% 42.00%  
United States | ERLEADA | Pharmaceutical | Oncology      
Segment Reporting Information [Line Items]      
Sales to Customers $ 968 $ 813 583
Percentage Change In Sales By Segment Of Business 19.20% 39.30%  
United States | IMBRUVICA | Pharmaceutical | Oncology      
Segment Reporting Information [Line Items]      
Sales to Customers $ 1,390 $ 1,747 1,821
Percentage Change In Sales By Segment Of Business (20.40%) (4.00%)  
United States | ZYTIGA/abiraterone acetate | Pharmaceutical | Oncology      
Segment Reporting Information [Line Items]      
Sales to Customers $ 74 $ 119 373
Percentage Change In Sales By Segment Of Business (37.80%) (68.10%)  
United States | Other Oncology | Pharmaceutical | Oncology      
Segment Reporting Information [Line Items]      
Sales to Customers $ 289 $ 110 83
Percentage Change In Sales By Segment Of Business   31.70%  
United States | OPSUMIT | Pharmaceutical | Pulmonary Hypertension      
Segment Reporting Information [Line Items]      
Sales to Customers $ 1,132 $ 1,147 1,008
Percentage Change In Sales By Segment Of Business (1.30%) 13.70%  
United States | UPTRAVI | Pharmaceutical | Pulmonary Hypertension      
Segment Reporting Information [Line Items]      
Sales to Customers $ 1,104 $ 1,056 955
Percentage Change In Sales By Segment Of Business 4.50% 10.50%  
United States | Other | Pharmaceutical | Pulmonary Hypertension      
Segment Reporting Information [Line Items]      
Sales to Customers $ 110 $ 163 169
Percentage Change In Sales By Segment Of Business (32.30%) (3.70%)  
United States | Other | Pharmaceutical | Cardiovascular/Metabolism/Other      
Segment Reporting Information [Line Items]      
Sales to Customers $ 376 $ 446 600
Percentage Change In Sales By Segment Of Business (15.50%) (25.70%)  
United States | XARELTO | Pharmaceutical | Cardiovascular/Metabolism/Other      
Segment Reporting Information [Line Items]      
Sales to Customers $ 2,473 $ 2,438 2,345
Percentage Change In Sales By Segment Of Business 1.40% 4.00%  
United States | INVOKANA/INVOKAMET | Pharmaceutical | Cardiovascular/Metabolism/Other      
Segment Reporting Information [Line Items]      
Sales to Customers $ 193 $ 308 564
Percentage Change In Sales By Segment Of Business (37.40%) (45.40%)  
United States | HIPS | Medical Devices | Orthopaedics      
Segment Reporting Information [Line Items]      
Sales to Customers $ 943 $ 878 793
Percentage Change In Sales By Segment Of Business 7.30% 10.70%  
United States | KNEES | Medical Devices | Orthopaedics      
Segment Reporting Information [Line Items]      
Sales to Customers $ 851 $ 787 743
Percentage Change In Sales By Segment Of Business 8.20% 5.90%  
United States | TRAUMA | Medical Devices | Orthopaedics      
Segment Reporting Information [Line Items]      
Sales to Customers $ 1,882 $ 1,819 1,648
Percentage Change In Sales By Segment Of Business 3.50% 10.40%  
United States | SPINE,SPORTS & OTHER | Medical Devices | Orthopaedics      
Segment Reporting Information [Line Items]      
Sales to Customers $ 1,645 $ 1,642 1,595
Percentage Change In Sales By Segment Of Business 0.20% 2.90%  
United States | ADVANCED | Medical Devices | Surgery      
Segment Reporting Information [Line Items]      
Sales to Customers $ 1,784 $ 1,761 1,535
Percentage Change In Sales By Segment Of Business 1.30% 14.90%  
United States | GENERAL | Medical Devices | Surgery      
Segment Reporting Information [Line Items]      
Sales to Customers $ 2,113 $ 2,105 1,714
Percentage Change In Sales By Segment Of Business 0.40% 22.70%  
United States | CONTACT LENSES/OTHER | Medical Devices | Vision      
Segment Reporting Information [Line Items]      
Sales to Customers $ 1,522 $ 1,398 1,213
Percentage Change In Sales By Segment Of Business 8.90% 15.20%  
United States | SURGICAL | Medical Devices | Vision      
Segment Reporting Information [Line Items]      
Sales to Customers $ 468 $ 459 344
Percentage Change In Sales By Segment Of Business 2.00% 33.50%  
Non-US      
Segment Reporting Information [Line Items]      
Sales to Customers $ 46,363 $ 46,619 39,451
Percentage Change In Sales By Segment Of Business (0.60%) 18.20%  
Non-US | Consumer Health      
Segment Reporting Information [Line Items]      
Sales to Customers $ 8,354 $ 8,519 8,088
Percentage Change In Sales By Segment Of Business (1.90%) 5.30%  
Non-US | Pharmaceutical      
Segment Reporting Information [Line Items]      
Sales to Customers $ 23,959 $ 23,726 19,440
Percentage Change In Sales By Segment Of Business 1.00% 22.00%  
Non-US | Pharmaceutical | Immunology      
Segment Reporting Information [Line Items]      
Sales to Customers $ 5,899 $ 5,907 4,880
Percentage Change In Sales By Segment Of Business (0.10%) 21.00%  
Non-US | Pharmaceutical | Infectious Diseases      
Segment Reporting Information [Line Items]      
Sales to Customers $ 3,769 $ 3,576 1,808
Percentage Change In Sales By Segment Of Business 5.40% 97.80%  
Non-US | Pharmaceutical | Neuroscience      
Segment Reporting Information [Line Items]      
Sales to Customers $ 3,323 $ 3,641 3,435
Percentage Change In Sales By Segment Of Business (8.70%) 6.00%  
Non-US | Pharmaceutical | Oncology      
Segment Reporting Information [Line Items]      
Sales to Customers $ 9,052 $ 8,590 7,275
Percentage Change In Sales By Segment Of Business 5.40% 18.10%  
Non-US | Pharmaceutical | Pulmonary Hypertension      
Segment Reporting Information [Line Items]      
Sales to Customers $ 1,071 $ 1,085 1,015
Percentage Change In Sales By Segment Of Business (1.30%) 6.90%  
Non-US | Pharmaceutical | Cardiovascular/Metabolism/Other      
Segment Reporting Information [Line Items]      
Sales to Customers $ 845 $ 927 1,025
Percentage Change In Sales By Segment Of Business (8.90%) (9.60%)  
Non-US | Medical Devices      
Segment Reporting Information [Line Items]      
Sales to Customers $ 14,050 $ 14,374 11,923
Percentage Change In Sales By Segment Of Business (2.30%) 20.60%  
Non-US | Medical Devices | Interventional Solutions      
Segment Reporting Information [Line Items]      
Sales to Customers $ 2,131 $ 2,135 1,594
Percentage Change In Sales By Segment Of Business (0.20%) 34.00%  
Non-US | Medical Devices | Orthopaedics      
Segment Reporting Information [Line Items]      
Sales to Customers $ 3,267 $ 3,462 2,984
Percentage Change In Sales By Segment Of Business (5.60%) 16.00%  
Non-US | Medical Devices | Surgery      
Segment Reporting Information [Line Items]      
Sales to Customers $ 5,793 $ 5,945 4,983
Percentage Change In Sales By Segment Of Business (2.60%) 19.30%  
Non-US | Medical Devices | Vision      
Segment Reporting Information [Line Items]      
Sales to Customers $ 2,859 $ 2,831 2,362
Percentage Change In Sales By Segment Of Business 1.00% 19.80%  
Non-US | OTC | Consumer Health      
Segment Reporting Information [Line Items]      
Sales to Customers $ 3,249 $ 3,034 2,761
Percentage Change In Sales By Segment Of Business 7.10% 9.90%  
Non-US | Skin health/Beauty | Consumer Health      
Segment Reporting Information [Line Items]      
Sales to Customers $ 2,015 $ 2,141 2,100
Percentage Change In Sales By Segment Of Business (5.90%) 1.90%  
Non-US | Oral Care | Consumer Health      
Segment Reporting Information [Line Items]      
Sales to Customers $ 871 $ 1,008 958
Percentage Change In Sales By Segment Of Business (13.60%) 5.10%  
Non-US | Baby Care | Consumer Health      
Segment Reporting Information [Line Items]      
Sales to Customers $ 1,104 $ 1,188 1,141
Percentage Change In Sales By Segment Of Business (7.10%) 4.10%  
Non-US | Women's Health | Consumer Health      
Segment Reporting Information [Line Items]      
Sales to Customers $ 891 $ 905 888
Percentage Change In Sales By Segment Of Business (1.50%) 1.80%  
Non-US | Wound Care and Other | Consumer Health      
Segment Reporting Information [Line Items]      
Sales to Customers $ 224 $ 243 240
Percentage Change In Sales By Segment Of Business (8.00%) 1.70%  
Non-US | Remicade | Pharmaceutical | Immunology      
Segment Reporting Information [Line Items]      
Sales to Customers $ 722 $ 935 893
Percentage Change In Sales By Segment Of Business (22.80%) 4.80%  
Non-US | Simponi/Simponi Aria | Pharmaceutical | Immunology      
Segment Reporting Information [Line Items]      
Sales to Customers $ 1,017 $ 1,148 1,088
Percentage Change In Sales By Segment Of Business (11.40%) 5.50%  
Non-US | Stelara | Pharmaceutical | Immunology      
Segment Reporting Information [Line Items]      
Sales to Customers $ 3,335 $ 3,196 2,467
Percentage Change In Sales By Segment Of Business 4.40% 29.60%  
Non-US | Tremfya | Pharmaceutical | Immunology      
Segment Reporting Information [Line Items]      
Sales to Customers $ 824 $ 624 421
Percentage Change In Sales By Segment Of Business 32.00% 48.20%  
Non-US | Other Immunology | Pharmaceutical | Immunology      
Segment Reporting Information [Line Items]      
Sales to Customers $ 0 $ 3 11
Percentage Change In Sales By Segment Of Business   (73.30%)  
Non-US | COVID-19 | Pharmaceutical | Infectious Diseases      
Segment Reporting Information [Line Items]      
Sales to Customers $ 2,059 $ 1,751 0
Percentage Change In Sales By Segment Of Business 17.60%    
Non-US | EDURANT/rilpivirine | Pharmaceutical | Infectious Diseases      
Segment Reporting Information [Line Items]      
Sales to Customers $ 972 $ 953 920
Percentage Change In Sales By Segment Of Business 2.00% 3.60%  
Non-US | PREZISTA/PREZCOBIX/REZOLSTA/SYMTUZA | Pharmaceutical | Infectious Diseases      
Segment Reporting Information [Line Items]      
Sales to Customers $ 449 $ 575 597
Percentage Change In Sales By Segment Of Business (21.90%) (3.60%)  
Non-US | Other Infectious Diseases | Pharmaceutical | Infectious Diseases      
Segment Reporting Information [Line Items]      
Sales to Customers $ 289 $ 297 292
Percentage Change In Sales By Segment Of Business (2.60%) 1.70%  
Non-US | CONCERTA/Methylphenidate | Pharmaceutical | Neuroscience      
Segment Reporting Information [Line Items]      
Sales to Customers $ 493 $ 495 439
Percentage Change In Sales By Segment Of Business (0.40%) 12.80%  
Non-US | INVEGA SUSTENNA/XEPLION/TRINZA/TREVICTA | Pharmaceutical | Neuroscience      
Segment Reporting Information [Line Items]      
Sales to Customers $ 1,426 $ 1,472 1,339
Percentage Change In Sales By Segment Of Business (3.10%) 10.00%  
Non-US | RISPERDAL CONSTA | Pharmaceutical | Neuroscience      
Segment Reporting Information [Line Items]      
Sales to Customers $ 228 $ 305 346
Percentage Change In Sales By Segment Of Business (25.30%) (11.80%)  
Non-US | OTHER NEUROSCIENCE | Pharmaceutical | Neuroscience      
Segment Reporting Information [Line Items]      
Sales to Customers $ 1,176 $ 1,368 1,312
Percentage Change In Sales By Segment Of Business (14.10%) 4.30%  
Non-US | DARZALEX | Pharmaceutical | Oncology      
Segment Reporting Information [Line Items]      
Sales to Customers $ 3,767 $ 2,854 1,958
Percentage Change In Sales By Segment Of Business 32.00% 45.80%  
Non-US | ERLEADA | Pharmaceutical | Oncology      
Segment Reporting Information [Line Items]      
Sales to Customers $ 913 $ 478 176
Non-US | IMBRUVICA | Pharmaceutical | Oncology      
Segment Reporting Information [Line Items]      
Sales to Customers $ 2,394 $ 2,622 2,307
Percentage Change In Sales By Segment Of Business (8.70%) 13.60%  
Non-US | ZYTIGA/abiraterone acetate | Pharmaceutical | Oncology      
Segment Reporting Information [Line Items]      
Sales to Customers $ 1,696 $ 2,178 2,097
Percentage Change In Sales By Segment Of Business (22.10%) 3.90%  
Non-US | Other Oncology | Pharmaceutical | Oncology      
Segment Reporting Information [Line Items]      
Sales to Customers $ 283 $ 458 738
Percentage Change In Sales By Segment Of Business (38.30%) (37.90%)  
Non-US | OPSUMIT | Pharmaceutical | Pulmonary Hypertension      
Segment Reporting Information [Line Items]      
Sales to Customers $ 651 $ 672 631
Percentage Change In Sales By Segment Of Business (3.20%) 6.60%  
Non-US | UPTRAVI | Pharmaceutical | Pulmonary Hypertension      
Segment Reporting Information [Line Items]      
Sales to Customers $ 218 $ 181 138
Percentage Change In Sales By Segment Of Business 20.40% 31.10%  
Non-US | Other | Pharmaceutical | Pulmonary Hypertension      
Segment Reporting Information [Line Items]      
Sales to Customers $ 202 $ 232 247
Percentage Change In Sales By Segment Of Business (12.80%) (5.90%)  
Non-US | Other | Pharmaceutical | Cardiovascular/Metabolism/Other      
Segment Reporting Information [Line Items]      
Sales to Customers $ 590 $ 673 794
Percentage Change In Sales By Segment Of Business (12.30%) (15.20%)  
Non-US | XARELTO | Pharmaceutical | Cardiovascular/Metabolism/Other      
Segment Reporting Information [Line Items]      
Sales to Customers $ 0 $ 0 0
Percentage Change In Sales By Segment Of Business 0.00% 0.00%  
Non-US | INVOKANA/INVOKAMET | Pharmaceutical | Cardiovascular/Metabolism/Other      
Segment Reporting Information [Line Items]      
Sales to Customers $ 255 $ 254 231
Percentage Change In Sales By Segment Of Business 0.10% 9.90%  
Non-US | HIPS | Medical Devices | Orthopaedics      
Segment Reporting Information [Line Items]      
Sales to Customers $ 571 $ 602 487
Percentage Change In Sales By Segment Of Business (5.10%) 23.60%  
Non-US | KNEES | Medical Devices | Orthopaedics      
Segment Reporting Information [Line Items]      
Sales to Customers $ 508 $ 538 427
Percentage Change In Sales By Segment Of Business (5.70%) 26.10%  
Non-US | TRAUMA | Medical Devices | Orthopaedics      
Segment Reporting Information [Line Items]      
Sales to Customers $ 989 $ 1,066 966
Percentage Change In Sales By Segment Of Business (7.20%) 10.40%  
Non-US | SPINE,SPORTS & OTHER | Medical Devices | Orthopaedics      
Segment Reporting Information [Line Items]      
Sales to Customers $ 1,198 $ 1,256 1,104
Percentage Change In Sales By Segment Of Business (4.60%) 13.80%  
Non-US | ADVANCED | Medical Devices | Surgery      
Segment Reporting Information [Line Items]      
Sales to Customers $ 2,785 $ 2,861 2,304
Percentage Change In Sales By Segment Of Business (2.60%) 24.10%  
Non-US | GENERAL | Medical Devices | Surgery      
Segment Reporting Information [Line Items]      
Sales to Customers $ 3,008 $ 3,085 2,679
Percentage Change In Sales By Segment Of Business (2.50%) 15.20%  
Non-US | CONTACT LENSES/OTHER | Medical Devices | Vision      
Segment Reporting Information [Line Items]      
Sales to Customers $ 2,022 $ 2,043 1,781
Percentage Change In Sales By Segment Of Business (1.00%) 14.70%  
Non-US | SURGICAL | Medical Devices | Vision      
Segment Reporting Information [Line Items]      
Sales to Customers $ 837 $ 788 581
Percentage Change In Sales By Segment Of Business 6.20% 35.70%  
UNITED STATES Exports | Remicade | Pharmaceutical | Immunology      
Segment Reporting Information [Line Items]      
Sales to Customers $ 204 $ 236 346
Percentage Change In Sales By Segment Of Business (13.60%) (31.90%)  
CHINA | OTC | CONSUMER HEALTH and PHARMACEUTICAL      
Segment Reporting Information [Line Items]      
Sales to Customers   $ 400 $ 400