Parent Directory| Name | Size | Last Modified |
|---|---|---|
 0000875045-18-000005-index-headers.html | 2018-02-01 16:35:03 | |
| 0000875045-18-000005-index.html | 2018-02-01 16:35:03 | |
| 0000875045-18-000005.txt | 2018-02-01 16:35:03 | |
 0000875045-18-000005-xbrl.zip | 555316 | 2018-02-01 16:35:03 |
 acquiredinprocessrdchart.jpg | 17454 | 2018-02-01 16:35:03 |
 amortofacqintanassetschart.jpg | 19882 | 2018-02-01 16:35:03 |
 anticd20revenueschart.jpg | 45295 | 2018-02-01 16:35:03 |
 avonex.jpg | 5670 | 2018-02-01 16:35:03 |
 benepalia02.jpg | 5283 | 2018-02-01 16:35:03 |
| biib-20171231.xml | 4971313 | 2018-02-01 16:35:03 |
| biib-20171231.xsd | 120700 | 2018-02-01 16:35:03 |
| biib-20171231x10k.htm | 4142574 | 2018-02-01 16:35:03 |
| biib-20171231xex1010.htm | 27576 | 2018-02-01 16:35:03 |
| biib-20171231xex1011.htm | 27456 | 2018-02-01 16:35:03 |
| biib-20171231xex1028.htm | 16293 | 2018-02-01 16:35:03 |
| biib-20171231xex1031.htm | 74606 | 2018-02-01 16:35:03 |
| biib-20171231xex1032.htm | 39717 | 2018-02-01 16:35:03 |
| biib-20171231xex1033.htm | 321097 | 2018-02-01 16:35:03 |
| biib-20171231xex21.htm | 59453 | 2018-02-01 16:35:03 |
| biib-20171231xex23.htm | 2658 | 2018-02-01 16:35:03 |
| biib-20171231xex311.htm | 13956 | 2018-02-01 16:35:03 |
| biib-20171231xex312.htm | 14299 | 2018-02-01 16:35:03 |
| biib-20171231xex321.htm | 6575 | 2018-02-01 16:35:03 |
| biib-20171231_cal.xml | 152081 | 2018-02-01 16:35:03 |
| biib-20171231_def.xml | 677137 | 2018-02-01 16:35:03 |
| biib-20171231_lab.xml | 1576222 | 2018-02-01 16:35:03 |
| biib-20171231_pre.xml | 1020896 | 2018-02-01 16:35:03 |
 biogenidec.jpg | 11141 | 2018-02-01 16:35:03 |
 biogenlogostandarda06.jpg | 95885 | 2018-02-01 16:35:03 |
 biosimilarschart.jpg | 20890 | 2018-02-01 16:35:03 |
 collabprofitsharechart.jpg | 18726 | 2018-02-01 16:35:03 |
 corporatestrategy.jpg | 37006 | 2018-02-01 16:35:03 |
 costofsaleschart.jpg | 32446 | 2018-02-01 16:35:03 |
 equityinlossofinvesteechart.jpg | 18186 | 2018-02-01 16:35:03 |
 fampyra.jpg | 2031 | 2018-02-01 16:35:03 |
| FilingSummary.xml | 74589 | 2018-02-01 16:35:03 |
 financialhighlightschart.jpg | 34559 | 2018-02-01 16:35:03 |
| Financial_Report.xlsx | 211085 | 2018-02-01 16:35:03 |
 flixabi.jpg | 5565 | 2018-02-01 16:35:03 |
 fumaderm.jpg | 3140 | 2018-02-01 16:35:03 |
 gazyva.jpg | 21759 | 2018-02-01 16:35:03 |
 geographicsaleschart.jpg | 34372 | 2018-02-01 16:35:03 |
 glonfvcontconsideration.jpg | 18937 | 2018-02-01 16:35:03 |
 incometaxprovisionchart.jpg | 35385 | 2018-02-01 16:35:03 |
 interferonchart.jpg | 36664 | 2018-02-01 16:35:03 |
 noncontrollinginterestchart.jpg | 19938 | 2018-02-01 16:35:03 |
 ocrevusmultiplesclerosislogo.jpg | 10027 | 2018-02-01 16:35:03 |
 oiechart.jpg | 20272 | 2018-02-01 16:35:03 |
 otherrevenueschart.jpg | 31270 | 2018-02-01 16:35:03 |
 part1researchanddevchart.jpg | 20758 | 2018-02-01 16:35:03 |
 plegridy.jpg | 5127 | 2018-02-01 16:35:03 |
 principalproductschart.jpg | 70489 | 2018-02-01 16:35:03 |
| R1.htm | 28387 | 2018-02-01 16:35:03 |
| R10.htm | 26716 | 2018-02-01 16:35:03 |
| R100.htm | 31881 | 2018-02-01 16:35:03 |
| R101.htm | 13489 | 2018-02-01 16:35:03 |
| R102.htm | 84988 | 2018-02-01 16:35:03 |
| R103.htm | 35606 | 2018-02-01 16:35:03 |
| R104.htm | 27362 | 2018-02-01 16:35:03 |
| R105.htm | 32214 | 2018-02-01 16:35:03 |
| R106.htm | 15577 | 2018-02-01 16:35:03 |
| R107.htm | 61613 | 2018-02-01 16:35:03 |
| R108.htm | 47045 | 2018-02-01 16:35:03 |
| R109.htm | 66225 | 2018-02-01 16:35:03 |
| R11.htm | 43517 | 2018-02-01 16:35:03 |
| R110.htm | 19823 | 2018-02-01 16:35:03 |
| R111.htm | 33803 | 2018-02-01 16:35:03 |
| R112.htm | 16365 | 2018-02-01 16:35:03 |
| R113.htm | 7473 | 2018-02-01 16:35:03 |
| R114.htm | 327095 | 2018-02-01 16:35:03 |
| R115.htm | 47672 | 2018-02-01 16:35:03 |
| R116.htm | 89199 | 2018-02-01 16:35:03 |
| R117.htm | 11626 | 2018-02-01 16:35:03 |
| R118.htm | 17874 | 2018-02-01 16:35:03 |
| R119.htm | 99934 | 2018-02-01 16:35:03 |
| R12.htm | 94547 | 2018-02-01 16:35:03 |
| R120.htm | 33564 | 2018-02-01 16:35:03 |
| R121.htm | 20267 | 2018-02-01 16:35:03 |
| R122.htm | 35986 | 2018-02-01 16:35:03 |
| R123.htm | 67751 | 2018-02-01 16:35:03 |
| R124.htm | 8135 | 2018-02-01 16:35:03 |
| R13.htm | 26020 | 2018-02-01 16:35:03 |
| R14.htm | 87973 | 2018-02-01 16:35:03 |
| R15.htm | 150811 | 2018-02-01 16:35:03 |
| R16.htm | 133705 | 2018-02-01 16:35:03 |
| R17.htm | 74995 | 2018-02-01 16:35:03 |
| R18.htm | 32731 | 2018-02-01 16:35:03 |
| R19.htm | 54389 | 2018-02-01 16:35:03 |
| R2.htm | 70487 | 2018-02-01 16:35:03 |
| R20.htm | 23904 | 2018-02-01 16:35:03 |
| R21.htm | 118034 | 2018-02-01 16:35:03 |
| R22.htm | 32072 | 2018-02-01 16:35:03 |
| R23.htm | 181741 | 2018-02-01 16:35:03 |
| R24.htm | 148722 | 2018-02-01 16:35:03 |
| R25.htm | 68624 | 2018-02-01 16:35:03 |
| R26.htm | 14985 | 2018-02-01 16:35:03 |
| R27.htm | 148352 | 2018-02-01 16:35:03 |
| R28.htm | 21301 | 2018-02-01 16:35:03 |
| R29.htm | 53679 | 2018-02-01 16:35:03 |
| R3.htm | 38605 | 2018-02-01 16:35:03 |
| R30.htm | 6929 | 2018-02-01 16:35:03 |
| R31.htm | 16695 | 2018-02-01 16:35:03 |
| R32.htm | 210016 | 2018-02-01 16:35:03 |
| R33.htm | 150666 | 2018-02-01 16:35:03 |
| R34.htm | 5947 | 2018-02-01 16:35:03 |
| R35.htm | 184632 | 2018-02-01 16:35:03 |
| R36.htm | 9288 | 2018-02-01 16:35:03 |
| R37.htm | 21696 | 2018-02-01 16:35:03 |
| R38.htm | 28612 | 2018-02-01 16:35:03 |
| R39.htm | 95661 | 2018-02-01 16:35:03 |
| R4.htm | 86997 | 2018-02-01 16:35:03 |
| R40.htm | 23691 | 2018-02-01 16:35:03 |
| R41.htm | 69395 | 2018-02-01 16:35:03 |
| R42.htm | 137168 | 2018-02-01 16:35:03 |
| R43.htm | 135712 | 2018-02-01 16:35:03 |
| R44.htm | 65033 | 2018-02-01 16:35:03 |
| R45.htm | 24678 | 2018-02-01 16:35:03 |
| R46.htm | 38886 | 2018-02-01 16:35:03 |
| R47.htm | 15022 | 2018-02-01 16:35:03 |
| R48.htm | 119449 | 2018-02-01 16:35:03 |
| R49.htm | 30026 | 2018-02-01 16:35:03 |
| R5.htm | 8654 | 2018-02-01 16:35:03 |
| R50.htm | 162207 | 2018-02-01 16:35:03 |
| R51.htm | 129512 | 2018-02-01 16:35:03 |
| R52.htm | 57786 | 2018-02-01 16:35:03 |
| R53.htm | 55986 | 2018-02-01 16:35:03 |
| R54.htm | 34050 | 2018-02-01 16:35:03 |
| R55.htm | 201932 | 2018-02-01 16:35:03 |
| R56.htm | 150512 | 2018-02-01 16:35:03 |
| R57.htm | 46593 | 2018-02-01 16:35:03 |
| R58.htm | 28029 | 2018-02-01 16:35:03 |
| R59.htm | 37849 | 2018-02-01 16:35:03 |
| R6.htm | 89907 | 2018-02-01 16:35:03 |
| R60.htm | 26240 | 2018-02-01 16:35:03 |
| R61.htm | 20663 | 2018-02-01 16:35:03 |
| R62.htm | 39788 | 2018-02-01 16:35:03 |
| R63.htm | 25595 | 2018-02-01 16:35:03 |
| R64.htm | 6916 | 2018-02-01 16:35:03 |
| R65.htm | 15553 | 2018-02-01 16:35:03 |
| R66.htm | 15648 | 2018-02-01 16:35:03 |
| R67.htm | 92597 | 2018-02-01 16:35:03 |
| R68.htm | 25925 | 2018-02-01 16:35:03 |
| R69.htm | 59786 | 2018-02-01 16:35:03 |
| R7.htm | 125133 | 2018-02-01 16:35:03 |
| R70.htm | 18733 | 2018-02-01 16:35:03 |
| R71.htm | 12496 | 2018-02-01 16:35:03 |
| R72.htm | 67919 | 2018-02-01 16:35:03 |
| R73.htm | 12936 | 2018-02-01 16:35:03 |
| R74.htm | 33303 | 2018-02-01 16:35:03 |
| R75.htm | 22692 | 2018-02-01 16:35:03 |
| R76.htm | 9330 | 2018-02-01 16:35:03 |
| R77.htm | 6392 | 2018-02-01 16:35:03 |
| R78.htm | 5685 | 2018-02-01 16:35:03 |
| R79.htm | 33931 | 2018-02-01 16:35:03 |
| R8.htm | 113771 | 2018-02-01 16:35:03 |
| R80.htm | 18576 | 2018-02-01 16:35:03 |
| R81.htm | 39491 | 2018-02-01 16:35:03 |
| R82.htm | 24933 | 2018-02-01 16:35:03 |
| R83.htm | 33616 | 2018-02-01 16:35:03 |
| R84.htm | 30392 | 2018-02-01 16:35:03 |
| R85.htm | 19125 | 2018-02-01 16:35:03 |
| R86.htm | 74828 | 2018-02-01 16:35:03 |
| R87.htm | 8838 | 2018-02-01 16:35:03 |
| R88.htm | 29364 | 2018-02-01 16:35:03 |
| R89.htm | 30619 | 2018-02-01 16:35:03 |
| R9.htm | 10637 | 2018-02-01 16:35:03 |
| R90.htm | 31776 | 2018-02-01 16:35:03 |
| R91.htm | 35556 | 2018-02-01 16:35:03 |
| R92.htm | 22819 | 2018-02-01 16:35:03 |
| R93.htm | 22827 | 2018-02-01 16:35:03 |
| R94.htm | 24859 | 2018-02-01 16:35:03 |
| R95.htm | 7217 | 2018-02-01 16:35:03 |
| R96.htm | 32097 | 2018-02-01 16:35:03 |
| R97.htm | 23649 | 2018-02-01 16:35:03 |
| R98.htm | 15864 | 2018-02-01 16:35:03 |
| R99.htm | 16151 | 2018-02-01 16:35:03 |
 rdpiechart2015.jpg | 35703 | 2018-02-01 16:35:03 |
 rdpiechart2016.jpg | 36799 | 2018-02-01 16:35:03 |
 rdpiechart2017.jpg | 37393 | 2018-02-01 16:35:03 |
| report.css | 2768 | 2018-02-01 16:35:03 |
 researchanddevelopmentchart.jpg | 70608 | 2018-02-01 16:35:03 |
 reserveschart.jpg | 33492 | 2018-02-01 16:35:03 |
 restructuringchargeschart.jpg | 19001 | 2018-02-01 16:35:03 |
 rituxan.jpg | 9985 | 2018-02-01 16:35:03 |
 sellinggeneraladminchart.jpg | 20779 | 2018-02-01 16:35:03 |
| Show.js | 1411 | 2018-02-01 16:35:03 |
 spinrazachart.jpg | 24256 | 2018-02-01 16:35:03 |
 spinrazalogonewa01.jpg | 72059 | 2018-02-01 16:35:03 |
 stockperformancechart.jpg | 63262 | 2018-02-01 16:35:03 |
 tecfidera.jpg | 7384 | 2018-02-01 16:35:03 |
 tecfiderachart.jpg | 35340 | 2018-02-01 16:35:03 |
 teclitigationchart.jpg | 18080 | 2018-02-01 16:35:03 |
 tysabri.jpg | 6359 | 2018-02-01 16:35:03 |
 tysabrichart.jpg | 36944 | 2018-02-01 16:35:03 |
 zinbryta.jpg | 4850 | 2018-02-01 16:35:03 |
 zinbrytachart.jpg | 21065 | 2018-02-01 16:35:03 |