Parent Directory| Name | Size | Last Modified |
|---|---|---|
 0000875045-18-000032-index-headers.html | 2018-10-23 16:25:54 | |
| 0000875045-18-000032-index.html | 2018-10-23 16:25:54 | |
| 0000875045-18-000032.txt | 2018-10-23 16:25:54 | |
 0000875045-18-000032-xbrl.zip | 335025 | 2018-10-23 16:25:54 |
 acquirediprandd.jpg | 23169 | 2018-10-23 16:25:54 |
 amortofacquiredintanassets.jpg | 24341 | 2018-10-23 16:25:54 |
 anti-cd20therapeuticprgrams.jpg | 49728 | 2018-10-23 16:25:54 |
| biib-20180930.xml | 3318888 | 2018-10-23 16:25:54 |
| biib-20180930.xsd | 72819 | 2018-10-23 16:25:54 |
| biib-20180930_cal.xml | 103479 | 2018-10-23 16:25:54 |
| biib-20180930_def.xml | 364622 | 2018-10-23 16:25:54 |
| biib-20180930_lab.xml | 896291 | 2018-10-23 16:25:54 |
| biib-20180930_pre.xml | 552670 | 2018-10-23 16:25:54 |
| biib-2018930x10q.htm | 2234115 | 2018-10-23 16:25:54 |
| biib-2018930xex311.htm | 14191 | 2018-10-23 16:25:54 |
| biib-2018930xex312.htm | 14945 | 2018-10-23 16:25:54 |
| biib-2018930xex321.htm | 10792 | 2018-10-23 16:25:54 |
 biogenlogostandarda17.jpg | 756402 | 2018-10-23 16:25:54 |
 biosimilars.jpg | 26904 | 2018-10-23 16:25:54 |
 collaborationprofitsharing.jpg | 23944 | 2018-10-23 16:25:54 |
 costofsales.jpg | 35607 | 2018-10-23 16:25:54 |
| FilingSummary.xml | 49075 | 2018-10-23 16:25:54 |
 financialhighlights.jpg | 37508 | 2018-10-23 16:25:54 |
| Financial_Report.xlsx | 123913 | 2018-10-23 16:25:54 |
 gainlossfvremeasurementcc.jpg | 24646 | 2018-10-23 16:25:54 |
 incometaxprovision.jpg | 34961 | 2018-10-23 16:25:54 |
 interferon.jpg | 38541 | 2018-10-23 16:25:54 |
 noncontrollinginterest.jpg | 21729 | 2018-10-23 16:25:54 |
 otherincomeexpense.jpg | 23544 | 2018-10-23 16:25:54 |
 otherrevenues.jpg | 32781 | 2018-10-23 16:25:54 |
| R1.htm | 24077 | 2018-10-23 16:25:54 |
| R10.htm | 234188 | 2018-10-23 16:25:54 |
| R11.htm | 22558 | 2018-10-23 16:25:54 |
| R12.htm | 78605 | 2018-10-23 16:25:54 |
| R13.htm | 161638 | 2018-10-23 16:25:54 |
| R14.htm | 141327 | 2018-10-23 16:25:54 |
| R15.htm | 98447 | 2018-10-23 16:25:54 |
| R16.htm | 8107 | 2018-10-23 16:25:54 |
| R17.htm | 39532 | 2018-10-23 16:25:54 |
| R18.htm | 108136 | 2018-10-23 16:25:54 |
| R19.htm | 42084 | 2018-10-23 16:25:54 |
| R2.htm | 73476 | 2018-10-23 16:25:54 |
| R20.htm | 80337 | 2018-10-23 16:25:54 |
| R21.htm | 59601 | 2018-10-23 16:25:54 |
| R22.htm | 52117 | 2018-10-23 16:25:54 |
| R23.htm | 94717 | 2018-10-23 16:25:54 |
| R24.htm | 14892 | 2018-10-23 16:25:54 |
| R25.htm | 27007 | 2018-10-23 16:25:54 |
| R26.htm | 65648 | 2018-10-23 16:25:54 |
| R27.htm | 234914 | 2018-10-23 16:25:54 |
| R28.htm | 23004 | 2018-10-23 16:25:54 |
| R29.htm | 64010 | 2018-10-23 16:25:54 |
| R3.htm | 30514 | 2018-10-23 16:25:54 |
| R30.htm | 156416 | 2018-10-23 16:25:54 |
| R31.htm | 138401 | 2018-10-23 16:25:54 |
| R32.htm | 90687 | 2018-10-23 16:25:54 |
| R33.htm | 31229 | 2018-10-23 16:25:54 |
| R34.htm | 109551 | 2018-10-23 16:25:54 |
| R35.htm | 41883 | 2018-10-23 16:25:54 |
| R36.htm | 75640 | 2018-10-23 16:25:54 |
| R37.htm | 41064 | 2018-10-23 16:25:54 |
| R38.htm | 49070 | 2018-10-23 16:25:54 |
| R39.htm | 62664 | 2018-10-23 16:25:54 |
| R4.htm | 87810 | 2018-10-23 16:25:54 |
| R40.htm | 18528 | 2018-10-23 16:25:54 |
| R41.htm | 24558 | 2018-10-23 16:25:54 |
| R42.htm | 8549 | 2018-10-23 16:25:54 |
| R43.htm | 63927 | 2018-10-23 16:25:54 |
| R44.htm | 22565 | 2018-10-23 16:25:54 |
| R45.htm | 6235 | 2018-10-23 16:25:54 |
| R46.htm | 13921 | 2018-10-23 16:25:54 |
| R47.htm | 18091 | 2018-10-23 16:25:54 |
| R48.htm | 8388 | 2018-10-23 16:25:54 |
| R49.htm | 15518 | 2018-10-23 16:25:54 |
| R5.htm | 6350 | 2018-10-23 16:25:54 |
| R50.htm | 88431 | 2018-10-23 16:25:54 |
| R51.htm | 17826 | 2018-10-23 16:25:54 |
| R52.htm | 68670 | 2018-10-23 16:25:54 |
| R53.htm | 21780 | 2018-10-23 16:25:54 |
| R54.htm | 12826 | 2018-10-23 16:25:54 |
| R55.htm | 41763 | 2018-10-23 16:25:54 |
| R56.htm | 12934 | 2018-10-23 16:25:54 |
| R57.htm | 39669 | 2018-10-23 16:25:54 |
| R58.htm | 21353 | 2018-10-23 16:25:54 |
| R59.htm | 9704 | 2018-10-23 16:25:54 |
| R6.htm | 81528 | 2018-10-23 16:25:54 |
| R60.htm | 4261 | 2018-10-23 16:25:54 |
| R61.htm | 16507 | 2018-10-23 16:25:54 |
| R62.htm | 78344 | 2018-10-23 16:25:54 |
| R63.htm | 10827 | 2018-10-23 16:25:54 |
| R64.htm | 15837 | 2018-10-23 16:25:54 |
| R65.htm | 34859 | 2018-10-23 16:25:54 |
| R66.htm | 43374 | 2018-10-23 16:25:54 |
| R67.htm | 25545 | 2018-10-23 16:25:54 |
| R68.htm | 28666 | 2018-10-23 16:25:54 |
| R69.htm | 20838 | 2018-10-23 16:25:54 |
| R7.htm | 56651 | 2018-10-23 16:25:54 |
| R70.htm | 28181 | 2018-10-23 16:25:54 |
| R71.htm | 16986 | 2018-10-23 16:25:54 |
| R72.htm | 29884 | 2018-10-23 16:25:54 |
| R73.htm | 48047 | 2018-10-23 16:25:54 |
| R74.htm | 40768 | 2018-10-23 16:25:54 |
| R75.htm | 11721 | 2018-10-23 16:25:54 |
| R76.htm | 108210 | 2018-10-23 16:25:54 |
| R77.htm | 21058 | 2018-10-23 16:25:54 |
| R78.htm | 15301 | 2018-10-23 16:25:54 |
| R79.htm | 6366 | 2018-10-23 16:25:54 |
| R8.htm | 13052 | 2018-10-23 16:25:54 |
| R9.htm | 7304 | 2018-10-23 16:25:54 |
 rd.jpg | 75731 | 2018-10-23 16:25:54 |
 rdpie2017.jpg | 36941 | 2018-10-23 16:25:54 |
 rdpie2018.jpg | 36428 | 2018-10-23 16:25:54 |
| report.css | 2768 | 2018-10-23 16:25:54 |
 reservesfordisandallowances.jpg | 39278 | 2018-10-23 16:25:54 |
 restructuring.jpg | 20748 | 2018-10-23 16:25:54 |
 sga.jpg | 25447 | 2018-10-23 16:25:54 |
| Show.js | 1086 | 2018-10-23 16:25:54 |
 spinraza.jpg | 35599 | 2018-10-23 16:25:54 |
 tecfidera.jpg | 40821 | 2018-10-23 16:25:54 |
 tysabri.jpg | 38306 | 2018-10-23 16:25:54 |
 zinbryta.jpg | 24742 | 2018-10-23 16:25:54 |