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Results for the year - Segment Information - Net sales - Business segments and geographical areas (Details) - DKK (kr)
kr in Millions
12 Months Ended
Dec. 31, 2024
Dec. 31, 2023
Dec. 31, 2022
Disclosure of geographical areas [line items]      
Net sales kr 290,403 kr 232,261 kr 176,954
Total sales growth as reported (as a percent) 25.00% 31.30% 25.70%
Diabetes and Obesity care      
Disclosure of geographical areas [line items]      
Net sales kr 271,764 kr 215,098 kr 156,412
Rare disease      
Disclosure of geographical areas [line items]      
Net sales 18,639 17,163 20,542
Total GLP-1 | Diabetes and Obesity care      
Disclosure of geographical areas [line items]      
Net sales 149,125 123,132 83,371
Ozempic | Diabetes and Obesity care      
Disclosure of geographical areas [line items]      
Net sales 120,342 95,718 59,750
Rybelsus | Diabetes and Obesity care      
Disclosure of geographical areas [line items]      
Net sales 23,301 18,750 11,299
Victoza | Diabetes and Obesity care      
Disclosure of geographical areas [line items]      
Net sales 5,482 8,664 12,322
Total insulin | Diabetes and Obesity care      
Disclosure of geographical areas [line items]      
Net sales 55,373 48,022 52,952
Long-acting insulin | Diabetes and Obesity care      
Disclosure of geographical areas [line items]      
Net sales 19,095 14,905 16,741
Awigli | Diabetes and Obesity care      
Disclosure of geographical areas [line items]      
Net sales 19 0 0
Tresiba | Diabetes and Obesity care      
Disclosure of geographical areas [line items]      
Net sales 9,905 7,752 9,353
Xultophy | Diabetes and Obesity care      
Disclosure of geographical areas [line items]      
Net sales 4,503 3,219 2,809
Levemir | Diabetes and Obesity care      
Disclosure of geographical areas [line items]      
Net sales 4,668 3,934 4,579
Premix insulin | Diabetes and Obesity care      
Disclosure of geographical areas [line items]      
Net sales 10,789 9,574 10,562
Ryzodeg | Diabetes and Obesity care      
Disclosure of geographical areas [line items]      
Net sales 4,929 3,730 2,889
NovoMix | Diabetes and Obesity care      
Disclosure of geographical areas [line items]      
Net sales 5,860 5,844 7,673
Fast-acting insulin | Diabetes and Obesity care      
Disclosure of geographical areas [line items]      
Net sales 18,522 15,949 17,463
Fiasp | Diabetes and Obesity care      
Disclosure of geographical areas [line items]      
Net sales 1,869 2,173 2,003
NovoRapid | Diabetes and Obesity care      
Disclosure of geographical areas [line items]      
Net sales 16,653 13,776 15,460
Human insulin | Diabetes and Obesity care      
Disclosure of geographical areas [line items]      
Net sales 6,967 7,594 8,186
Other Diabetes care | Diabetes and Obesity care      
Disclosure of geographical areas [line items]      
Net sales 2,120 2,312 3,225
Total Diabetes care | Diabetes and Obesity care      
Disclosure of geographical areas [line items]      
Net sales 206,618 173,466 139,548
Total Obesity care | Diabetes and Obesity care      
Disclosure of geographical areas [line items]      
Net sales 65,146 41,632 16,864
Wegovy | Diabetes and Obesity care      
Disclosure of geographical areas [line items]      
Net sales 58,206 31,343 6,188
Saxenda | Diabetes and Obesity care      
Disclosure of geographical areas [line items]      
Net sales 6,940 10,289 10,676
Rare blood disorders | Rare disease      
Disclosure of geographical areas [line items]      
Net sales 12,138 11,776 11,706
Haemophilia A | Rare disease      
Disclosure of geographical areas [line items]      
Net sales 2,454 2,422 2,338
Haemophilia B | Rare disease      
Disclosure of geographical areas [line items]      
Net sales 1,306 1,061 759
NovoSeven | Rare disease      
Disclosure of geographical areas [line items]      
Net sales 7,983 7,958 8,308
Rare endocrine disorders | Rare disease      
Disclosure of geographical areas [line items]      
Net sales 4,993 3,836 7,138
Other Rare disease | Rare disease      
Disclosure of geographical areas [line items]      
Net sales 1,508 1,551 1,698
International Operations      
Disclosure of geographical areas [line items]      
Net sales kr 112,231 kr 95,632 kr 85,847
Total sales growth as reported (as a percent) 17.40% 11.40% 16.70%
International Operations | Diabetes and Obesity care      
Disclosure of geographical areas [line items]      
Net sales kr 102,794 kr 86,149 kr 73,270
International Operations | Rare disease      
Disclosure of geographical areas [line items]      
Net sales 9,437 9,483 12,577
International Operations | Total GLP-1 | Diabetes and Obesity care      
Disclosure of geographical areas [line items]      
Net sales 44,972 38,617 26,196
International Operations | Ozempic | Diabetes and Obesity care      
Disclosure of geographical areas [line items]      
Net sales 29,055 26,378 17,369
International Operations | Rybelsus | Diabetes and Obesity care      
Disclosure of geographical areas [line items]      
Net sales 12,231 7,389 3,155
International Operations | Victoza | Diabetes and Obesity care      
Disclosure of geographical areas [line items]      
Net sales 3,686 4,850 5,672
International Operations | Total insulin | Diabetes and Obesity care      
Disclosure of geographical areas [line items]      
Net sales 38,978 37,230 38,760
International Operations | Long-acting insulin | Diabetes and Obesity care      
Disclosure of geographical areas [line items]      
Net sales 12,884 11,339 11,403
International Operations | Awigli | Diabetes and Obesity care      
Disclosure of geographical areas [line items]      
Net sales 15 0 0
International Operations | Tresiba | Diabetes and Obesity care      
Disclosure of geographical areas [line items]      
Net sales 6,494 5,864 6,092
International Operations | Xultophy | Diabetes and Obesity care      
Disclosure of geographical areas [line items]      
Net sales 4,217 2,887 2,400
International Operations | Levemir | Diabetes and Obesity care      
Disclosure of geographical areas [line items]      
Net sales 2,158 2,588 2,911
International Operations | Premix insulin | Diabetes and Obesity care      
Disclosure of geographical areas [line items]      
Net sales 10,143 9,342 10,023
International Operations | Ryzodeg | Diabetes and Obesity care      
Disclosure of geographical areas [line items]      
Net sales 4,929 3,730 2,889
International Operations | NovoMix | Diabetes and Obesity care      
Disclosure of geographical areas [line items]      
Net sales 5,214 5,612 7,134
International Operations | Fast-acting insulin | Diabetes and Obesity care      
Disclosure of geographical areas [line items]      
Net sales 10,563 10,415 10,826
International Operations | Fiasp | Diabetes and Obesity care      
Disclosure of geographical areas [line items]      
Net sales 1,609 1,512 1,354
International Operations | NovoRapid | Diabetes and Obesity care      
Disclosure of geographical areas [line items]      
Net sales 8,954 8,903 9,472
International Operations | Human insulin | Diabetes and Obesity care      
Disclosure of geographical areas [line items]      
Net sales 5,388 6,134 6,508
International Operations | Other Diabetes care | Diabetes and Obesity care      
Disclosure of geographical areas [line items]      
Net sales 1,856 1,987 2,428
International Operations | Total Diabetes care | Diabetes and Obesity care      
Disclosure of geographical areas [line items]      
Net sales 85,806 77,834 67,384
International Operations | Total Obesity care | Diabetes and Obesity care      
Disclosure of geographical areas [line items]      
Net sales 16,988 8,315 5,886
International Operations | Wegovy | Diabetes and Obesity care      
Disclosure of geographical areas [line items]      
Net sales 11,425 1,913 54
International Operations | Saxenda | Diabetes and Obesity care      
Disclosure of geographical areas [line items]      
Net sales 5,563 6,402 5,832
International Operations | Rare blood disorders | Rare disease      
Disclosure of geographical areas [line items]      
Net sales 6,442 6,432 6,671
International Operations | Haemophilia A | Rare disease      
Disclosure of geographical areas [line items]      
Net sales 1,906 1,939 1,769
International Operations | Haemophilia B | Rare disease      
Disclosure of geographical areas [line items]      
Net sales 649 584 479
International Operations | NovoSeven | Rare disease      
Disclosure of geographical areas [line items]      
Net sales 3,735 3,789 4,335
International Operations | Rare endocrine disorders | Rare disease      
Disclosure of geographical areas [line items]      
Net sales 2,032 2,045 4,904
International Operations | Other Rare disease | Rare disease      
Disclosure of geographical areas [line items]      
Net sales 963 1,006 1,002
EMEA      
Disclosure of geographical areas [line items]      
Net sales kr 60,402 kr 50,867 kr 44,236
Total sales growth as reported (as a percent) 18.70% 15.00% 17.30%
EMEA | Diabetes and Obesity care      
Disclosure of geographical areas [line items]      
Net sales kr 54,699 kr 45,366 kr 37,405
EMEA | Rare disease      
Disclosure of geographical areas [line items]      
Net sales 5,703 5,501 6,831
EMEA | Total GLP-1 | Diabetes and Obesity care      
Disclosure of geographical areas [line items]      
Net sales 24,559 20,725 14,855
EMEA | Ozempic | Diabetes and Obesity care      
Disclosure of geographical areas [line items]      
Net sales 16,001 14,327 10,417
EMEA | Rybelsus | Diabetes and Obesity care      
Disclosure of geographical areas [line items]      
Net sales 7,136 4,232 1,714
EMEA | Victoza | Diabetes and Obesity care      
Disclosure of geographical areas [line items]      
Net sales 1,422 2,166 2,724
EMEA | Total insulin | Diabetes and Obesity care      
Disclosure of geographical areas [line items]      
Net sales 19,019 18,287 18,218
EMEA | Long-acting insulin | Diabetes and Obesity care      
Disclosure of geographical areas [line items]      
Net sales 7,686 7,103 7,157
EMEA | Awigli | Diabetes and Obesity care      
Disclosure of geographical areas [line items]      
Net sales 9 0 0
EMEA | Tresiba | Diabetes and Obesity care      
Disclosure of geographical areas [line items]      
Net sales 3,876 3,435 3,485
EMEA | Xultophy | Diabetes and Obesity care      
Disclosure of geographical areas [line items]      
Net sales 2,185 1,831 1,716
EMEA | Levemir | Diabetes and Obesity care      
Disclosure of geographical areas [line items]      
Net sales 1,616 1,837 1,956
EMEA | Premix insulin | Diabetes and Obesity care      
Disclosure of geographical areas [line items]      
Net sales 2,637 2,570 2,622
EMEA | Ryzodeg | Diabetes and Obesity care      
Disclosure of geographical areas [line items]      
Net sales 701 587 495
EMEA | NovoMix | Diabetes and Obesity care      
Disclosure of geographical areas [line items]      
Net sales 1,936 1,983 2,127
EMEA | Fast-acting insulin | Diabetes and Obesity care      
Disclosure of geographical areas [line items]      
Net sales 6,934 6,695 6,456
EMEA | Fiasp | Diabetes and Obesity care      
Disclosure of geographical areas [line items]      
Net sales 1,289 1,266 1,138
EMEA | NovoRapid | Diabetes and Obesity care      
Disclosure of geographical areas [line items]      
Net sales 5,645 5,429 5,318
EMEA | Human insulin | Diabetes and Obesity care      
Disclosure of geographical areas [line items]      
Net sales 1,762 1,919 1,983
EMEA | Other Diabetes care | Diabetes and Obesity care      
Disclosure of geographical areas [line items]      
Net sales 688 661 717
EMEA | Total Diabetes care | Diabetes and Obesity care      
Disclosure of geographical areas [line items]      
Net sales 44,266 39,673 33,790
EMEA | Total Obesity care | Diabetes and Obesity care      
Disclosure of geographical areas [line items]      
Net sales 10,433 5,693 3,615
EMEA | Wegovy | Diabetes and Obesity care      
Disclosure of geographical areas [line items]      
Net sales 7,513 1,913 54
EMEA | Saxenda | Diabetes and Obesity care      
Disclosure of geographical areas [line items]      
Net sales 2,920 3,780 3,561
EMEA | Rare blood disorders | Rare disease      
Disclosure of geographical areas [line items]      
Net sales 3,924 4,021 3,795
EMEA | Haemophilia A | Rare disease      
Disclosure of geographical areas [line items]      
Net sales 1,231 1,271 1,137
EMEA | Haemophilia B | Rare disease      
Disclosure of geographical areas [line items]      
Net sales 436 377 294
EMEA | NovoSeven | Rare disease      
Disclosure of geographical areas [line items]      
Net sales 2,168 2,285 2,311
EMEA | Rare endocrine disorders | Rare disease      
Disclosure of geographical areas [line items]      
Net sales 1,038 699 2,232
EMEA | Other Rare disease | Rare disease      
Disclosure of geographical areas [line items]      
Net sales 741 781 804
Region China      
Disclosure of geographical areas [line items]      
Net sales kr 18,501 kr 16,687 kr 16,209
Total sales growth as reported (as a percent) 10.90% 2.90% 1.20%
Region China | Diabetes and Obesity care      
Disclosure of geographical areas [line items]      
Net sales kr 18,088 kr 16,094 kr 15,353
Region China | Rare disease      
Disclosure of geographical areas [line items]      
Net sales 413 593 856
Region China | Total GLP-1 | Diabetes and Obesity care      
Disclosure of geographical areas [line items]      
Net sales 7,248 6,208 3,737
Region China | Ozempic | Diabetes and Obesity care      
Disclosure of geographical areas [line items]      
Net sales 5,762 4,821 2,196
Region China | Rybelsus | Diabetes and Obesity care      
Disclosure of geographical areas [line items]      
Net sales 511 131 63
Region China | Victoza | Diabetes and Obesity care      
Disclosure of geographical areas [line items]      
Net sales 975 1,256 1,478
Region China | Total insulin | Diabetes and Obesity care      
Disclosure of geographical areas [line items]      
Net sales 9,760 8,848 10,302
Region China | Long-acting insulin | Diabetes and Obesity care      
Disclosure of geographical areas [line items]      
Net sales 2,696 1,649 1,636
Region China | Awigli | Diabetes and Obesity care      
Disclosure of geographical areas [line items]      
Net sales 6 0 0
Region China | Tresiba | Diabetes and Obesity care      
Disclosure of geographical areas [line items]      
Net sales 978 848 1,050
Region China | Xultophy | Diabetes and Obesity care      
Disclosure of geographical areas [line items]      
Net sales 1,414 409 45
Region China | Levemir | Diabetes and Obesity care      
Disclosure of geographical areas [line items]      
Net sales 298 392 541
Region China | Premix insulin | Diabetes and Obesity care      
Disclosure of geographical areas [line items]      
Net sales 4,784 4,441 4,912
Region China | Ryzodeg | Diabetes and Obesity care      
Disclosure of geographical areas [line items]      
Net sales 2,782 1,965 1,218
Region China | NovoMix | Diabetes and Obesity care      
Disclosure of geographical areas [line items]      
Net sales 2,002 2,476 3,694
Region China | Fast-acting insulin | Diabetes and Obesity care      
Disclosure of geographical areas [line items]      
Net sales 1,474 1,545 1,942
Region China | Fiasp | Diabetes and Obesity care      
Disclosure of geographical areas [line items]      
Net sales 0 0 0
Region China | NovoRapid | Diabetes and Obesity care      
Disclosure of geographical areas [line items]      
Net sales 1,474 1,545 1,942
Region China | Human insulin | Diabetes and Obesity care      
Disclosure of geographical areas [line items]      
Net sales 806 1,213 1,812
Region China | Other Diabetes care | Diabetes and Obesity care      
Disclosure of geographical areas [line items]      
Net sales 782 892 1,181
Region China | Total Diabetes care | Diabetes and Obesity care      
Disclosure of geographical areas [line items]      
Net sales 17,790 15,948 15,220
Region China | Total Obesity care | Diabetes and Obesity care      
Disclosure of geographical areas [line items]      
Net sales 298 146 133
Region China | Wegovy | Diabetes and Obesity care      
Disclosure of geographical areas [line items]      
Net sales 196 0 0
Region China | Saxenda | Diabetes and Obesity care      
Disclosure of geographical areas [line items]      
Net sales 102 146 133
Region China | Rare blood disorders | Rare disease      
Disclosure of geographical areas [line items]      
Net sales 363 372 604
Region China | Haemophilia A | Rare disease      
Disclosure of geographical areas [line items]      
Net sales 236 223 81
Region China | Haemophilia B | Rare disease      
Disclosure of geographical areas [line items]      
Net sales 17 13 13
Region China | NovoSeven | Rare disease      
Disclosure of geographical areas [line items]      
Net sales 110 136 510
Region China | Rare endocrine disorders | Rare disease      
Disclosure of geographical areas [line items]      
Net sales 41 216 246
Region China | Other Rare disease | Rare disease      
Disclosure of geographical areas [line items]      
Net sales 9 5 6
Rest of World      
Disclosure of geographical areas [line items]      
Net sales kr 33,328 kr 28,078 kr 25,402
Total sales growth as reported (as a percent) 18.70% 10.50% 28.20%
Rest of World | Diabetes and Obesity care      
Disclosure of geographical areas [line items]      
Net sales kr 30,007 kr 24,689 kr 20,512
Rest of World | Rare disease      
Disclosure of geographical areas [line items]      
Net sales 3,321 3,389 4,890
Rest of World | Total GLP-1 | Diabetes and Obesity care      
Disclosure of geographical areas [line items]      
Net sales 13,165 11,684 7,604
Rest of World | Ozempic | Diabetes and Obesity care      
Disclosure of geographical areas [line items]      
Net sales 7,292 7,230 4,756
Rest of World | Rybelsus | Diabetes and Obesity care      
Disclosure of geographical areas [line items]      
Net sales 4,584 3,026 1,378
Rest of World | Victoza | Diabetes and Obesity care      
Disclosure of geographical areas [line items]      
Net sales 1,289 1,428 1,470
Rest of World | Total insulin | Diabetes and Obesity care      
Disclosure of geographical areas [line items]      
Net sales 10,199 10,095 10,240
Rest of World | Long-acting insulin | Diabetes and Obesity care      
Disclosure of geographical areas [line items]      
Net sales 2,502 2,587 2,610
Rest of World | Awigli | Diabetes and Obesity care      
Disclosure of geographical areas [line items]      
Net sales 0 0 0
Rest of World | Tresiba | Diabetes and Obesity care      
Disclosure of geographical areas [line items]      
Net sales 1,640 1,581 1,557
Rest of World | Xultophy | Diabetes and Obesity care      
Disclosure of geographical areas [line items]      
Net sales 618 647 639
Rest of World | Levemir | Diabetes and Obesity care      
Disclosure of geographical areas [line items]      
Net sales 244 359 414
Rest of World | Premix insulin | Diabetes and Obesity care      
Disclosure of geographical areas [line items]      
Net sales 2,722 2,331 2,489
Rest of World | Ryzodeg | Diabetes and Obesity care      
Disclosure of geographical areas [line items]      
Net sales 1,446 1,178 1,176
Rest of World | NovoMix | Diabetes and Obesity care      
Disclosure of geographical areas [line items]      
Net sales 1,276 1,153 1,313
Rest of World | Fast-acting insulin | Diabetes and Obesity care      
Disclosure of geographical areas [line items]      
Net sales 2,155 2,175 2,428
Rest of World | Fiasp | Diabetes and Obesity care      
Disclosure of geographical areas [line items]      
Net sales 320 246 216
Rest of World | NovoRapid | Diabetes and Obesity care      
Disclosure of geographical areas [line items]      
Net sales 1,835 1,929 2,212
Rest of World | Human insulin | Diabetes and Obesity care      
Disclosure of geographical areas [line items]      
Net sales 2,820 3,002 2,713
Rest of World | Other Diabetes care | Diabetes and Obesity care      
Disclosure of geographical areas [line items]      
Net sales 386 434 530
Rest of World | Total Diabetes care | Diabetes and Obesity care      
Disclosure of geographical areas [line items]      
Net sales 23,750 22,213 18,374
Rest of World | Total Obesity care | Diabetes and Obesity care      
Disclosure of geographical areas [line items]      
Net sales 6,257 2,476 2,138
Rest of World | Wegovy | Diabetes and Obesity care      
Disclosure of geographical areas [line items]      
Net sales 3,716 0 0
Rest of World | Saxenda | Diabetes and Obesity care      
Disclosure of geographical areas [line items]      
Net sales 2,541 2,476 2,138
Rest of World | Rare blood disorders | Rare disease      
Disclosure of geographical areas [line items]      
Net sales 2,155 2,039 2,272
Rest of World | Haemophilia A | Rare disease      
Disclosure of geographical areas [line items]      
Net sales 439 445 551
Rest of World | Haemophilia B | Rare disease      
Disclosure of geographical areas [line items]      
Net sales 196 194 172
Rest of World | NovoSeven | Rare disease      
Disclosure of geographical areas [line items]      
Net sales 1,457 1,368 1,514
Rest of World | Rare endocrine disorders | Rare disease      
Disclosure of geographical areas [line items]      
Net sales 953 1,130 2,426
Rest of World | Other Rare disease | Rare disease      
Disclosure of geographical areas [line items]      
Net sales 213 220 192
North America Operations      
Disclosure of geographical areas [line items]      
Net sales kr 178,172 kr 136,629 kr 91,107
Total sales growth as reported (as a percent) 30.40% 50.00% 35.40%
North America Operations | Diabetes and Obesity care      
Disclosure of geographical areas [line items]      
Net sales kr 168,970 kr 128,949 kr 83,142
North America Operations | Rare disease      
Disclosure of geographical areas [line items]      
Net sales 9,202 7,680 7,965
North America Operations | Total GLP-1 | Diabetes and Obesity care      
Disclosure of geographical areas [line items]      
Net sales 104,153 84,515 57,175
North America Operations | Ozempic | Diabetes and Obesity care      
Disclosure of geographical areas [line items]      
Net sales 91,287 69,340 42,381
North America Operations | Rybelsus | Diabetes and Obesity care      
Disclosure of geographical areas [line items]      
Net sales 11,070 11,361 8,144
North America Operations | Victoza | Diabetes and Obesity care      
Disclosure of geographical areas [line items]      
Net sales 1,796 3,814 6,650
North America Operations | Total insulin | Diabetes and Obesity care      
Disclosure of geographical areas [line items]      
Net sales 16,395 10,792 14,192
North America Operations | Long-acting insulin | Diabetes and Obesity care      
Disclosure of geographical areas [line items]      
Net sales 6,211 3,566 5,338
North America Operations | Awigli | Diabetes and Obesity care      
Disclosure of geographical areas [line items]      
Net sales 4 0 0
North America Operations | Tresiba | Diabetes and Obesity care      
Disclosure of geographical areas [line items]      
Net sales 3,411 1,888 3,261
North America Operations | Xultophy | Diabetes and Obesity care      
Disclosure of geographical areas [line items]      
Net sales 286 332 409
North America Operations | Levemir | Diabetes and Obesity care      
Disclosure of geographical areas [line items]      
Net sales 2,510 1,346 1,668
North America Operations | Premix insulin | Diabetes and Obesity care      
Disclosure of geographical areas [line items]      
Net sales 646 232 539
North America Operations | Ryzodeg | Diabetes and Obesity care      
Disclosure of geographical areas [line items]      
Net sales 0 0 0
North America Operations | NovoMix | Diabetes and Obesity care      
Disclosure of geographical areas [line items]      
Net sales 646 232 539
North America Operations | Fast-acting insulin | Diabetes and Obesity care      
Disclosure of geographical areas [line items]      
Net sales 7,959 5,534 6,637
North America Operations | Fiasp | Diabetes and Obesity care      
Disclosure of geographical areas [line items]      
Net sales 260 661 649
North America Operations | NovoRapid | Diabetes and Obesity care      
Disclosure of geographical areas [line items]      
Net sales 7,699 4,873 5,988
North America Operations | Human insulin | Diabetes and Obesity care      
Disclosure of geographical areas [line items]      
Net sales 1,579 1,460 1,678
North America Operations | Other Diabetes care | Diabetes and Obesity care      
Disclosure of geographical areas [line items]      
Net sales 264 325 797
North America Operations | Total Diabetes care | Diabetes and Obesity care      
Disclosure of geographical areas [line items]      
Net sales 120,812 95,632 72,164
North America Operations | Total Obesity care | Diabetes and Obesity care      
Disclosure of geographical areas [line items]      
Net sales 48,158 33,317 10,978
North America Operations | Wegovy | Diabetes and Obesity care      
Disclosure of geographical areas [line items]      
Net sales 46,781 29,430 6,134
North America Operations | Saxenda | Diabetes and Obesity care      
Disclosure of geographical areas [line items]      
Net sales 1,377 3,887 4,844
North America Operations | Rare blood disorders | Rare disease      
Disclosure of geographical areas [line items]      
Net sales 5,696 5,344 5,035
North America Operations | Haemophilia A | Rare disease      
Disclosure of geographical areas [line items]      
Net sales 548 483 569
North America Operations | Haemophilia B | Rare disease      
Disclosure of geographical areas [line items]      
Net sales 657 477 280
North America Operations | NovoSeven | Rare disease      
Disclosure of geographical areas [line items]      
Net sales 4,248 4,169 3,973
North America Operations | Rare endocrine disorders | Rare disease      
Disclosure of geographical areas [line items]      
Net sales 2,961 1,791 2,234
North America Operations | Other Rare disease | Rare disease      
Disclosure of geographical areas [line items]      
Net sales 545 545 696
US      
Disclosure of geographical areas [line items]      
Net sales kr 167,402 kr 127,534 kr 84,656
Total sales growth as reported (as a percent) 31.30% 50.60% 34.40%
US | Diabetes and Obesity care      
Disclosure of geographical areas [line items]      
Net sales kr 158,933 kr 120,504 kr 77,383
US | Rare disease      
Disclosure of geographical areas [line items]      
Net sales 8,469 7,030 7,273
US | Total GLP-1 | Diabetes and Obesity care      
Disclosure of geographical areas [line items]      
Net sales 96,695 77,683 53,167
US | Ozempic | Diabetes and Obesity care      
Disclosure of geographical areas [line items]      
Net sales 84,201 63,010 38,750
US | Rybelsus | Diabetes and Obesity care      
Disclosure of geographical areas [line items]      
Net sales 10,795 11,060 8,011
US | Victoza | Diabetes and Obesity care      
Disclosure of geographical areas [line items]      
Net sales 1,699 3,613 6,406
US | Total insulin | Diabetes and Obesity care      
Disclosure of geographical areas [line items]      
Net sales 15,478 9,818 13,054
US | Long-acting insulin | Diabetes and Obesity care      
Disclosure of geographical areas [line items]      
Net sales 5,538 2,931 4,685
US | Awigli | Diabetes and Obesity care      
Disclosure of geographical areas [line items]      
Net sales 0 0 0
US | Tresiba | Diabetes and Obesity care      
Disclosure of geographical areas [line items]      
Net sales 2,806 1,333 2,723
US | Xultophy | Diabetes and Obesity care      
Disclosure of geographical areas [line items]      
Net sales 281 325 399
US | Levemir | Diabetes and Obesity care      
Disclosure of geographical areas [line items]      
Net sales 2,451 1,273 1,563
US | Premix insulin | Diabetes and Obesity care      
Disclosure of geographical areas [line items]      
Net sales 632 216 517
US | Ryzodeg | Diabetes and Obesity care      
Disclosure of geographical areas [line items]      
Net sales 0 0 0
US | NovoMix | Diabetes and Obesity care      
Disclosure of geographical areas [line items]      
Net sales 632 216 517
US | Fast-acting insulin | Diabetes and Obesity care      
Disclosure of geographical areas [line items]      
Net sales 7,773 5,265 6,247
US | Fiasp | Diabetes and Obesity care      
Disclosure of geographical areas [line items]      
Net sales 213 618 606
US | NovoRapid | Diabetes and Obesity care      
Disclosure of geographical areas [line items]      
Net sales 7,560 4,647 5,641
US | Human insulin | Diabetes and Obesity care      
Disclosure of geographical areas [line items]      
Net sales 1,535 1,406 1,605
US | Other Diabetes care | Diabetes and Obesity care      
Disclosure of geographical areas [line items]      
Net sales 213 267 660
US | Total Diabetes care | Diabetes and Obesity care      
Disclosure of geographical areas [line items]      
Net sales 112,386 87,768 66,881
US | Total Obesity care | Diabetes and Obesity care      
Disclosure of geographical areas [line items]      
Net sales 46,547 32,736 10,502
US | Wegovy | Diabetes and Obesity care      
Disclosure of geographical areas [line items]      
Net sales 45,770 29,430 6,134
US | Saxenda | Diabetes and Obesity care      
Disclosure of geographical areas [line items]      
Net sales 777 3,306 4,368
US | Rare blood disorders | Rare disease      
Disclosure of geographical areas [line items]      
Net sales 5,387 5,070 4,710
US | Haemophilia A | Rare disease      
Disclosure of geographical areas [line items]      
Net sales 537 468 543
US | Haemophilia B | Rare disease      
Disclosure of geographical areas [line items]      
Net sales 486 336 152
US | NovoSeven | Rare disease      
Disclosure of geographical areas [line items]      
Net sales 4,135 4,065 3,811
US | Rare endocrine disorders | Rare disease      
Disclosure of geographical areas [line items]      
Net sales 2,922 1,757 2,205
US | Other Rare disease | Rare disease      
Disclosure of geographical areas [line items]      
Net sales kr 160 kr 203 kr 358