Parent Directory| Name | Size | Last Modified |
|---|---|---|
 0001193125-12-200855-index-headers.html | 2012-05-01 16:22:03 | |
| 0001193125-12-200855-index.html | 2012-05-01 16:22:03 | |
| 0001193125-12-200855.txt | 2012-05-01 16:22:03 | |
 0001193125-12-200855-xbrl.zip | 161159 | 2012-05-01 16:22:03 |
| biib-20120331.xml | 1299882 | 2012-05-01 16:22:03 |
| biib-20120331.xsd | 76291 | 2012-05-01 16:22:03 |
| biib-20120331_cal.xml | 94040 | 2012-05-01 16:22:03 |
| biib-20120331_def.xml | 266447 | 2012-05-01 16:22:03 |
| biib-20120331_lab.xml | 557098 | 2012-05-01 16:22:03 |
| biib-20120331_pre.xml | 398342 | 2012-05-01 16:22:03 |
| d314125d10q.htm | 986508 | 2012-05-01 16:22:03 |
| d314125dex311.htm | 9906 | 2012-05-01 16:22:03 |
| d314125dex312.htm | 10179 | 2012-05-01 16:22:03 |
| d314125dex321.htm | 5435 | 2012-05-01 16:22:03 |
| FilingSummary.xml | 37554 | 2012-05-01 16:22:03 |
| Financial_Report.xls | 1124067 | 2012-05-01 16:22:03 |
| R1.htm | 26721 | 2012-05-01 16:22:03 |
| R10.htm | 26730 | 2012-05-01 16:22:03 |
| R11.htm | 27590 | 2012-05-01 16:22:03 |
| R12.htm | 14331 | 2012-05-01 16:22:03 |
| R13.htm | 48255 | 2012-05-01 16:22:03 |
| R14.htm | 105107 | 2012-05-01 16:22:03 |
| R15.htm | 82535 | 2012-05-01 16:22:03 |
| R16.htm | 41320 | 2012-05-01 16:22:03 |
| R17.htm | 11862 | 2012-05-01 16:22:03 |
| R18.htm | 25058 | 2012-05-01 16:22:03 |
| R19.htm | 23987 | 2012-05-01 16:22:03 |
| R2.htm | 99258 | 2012-05-01 16:22:03 |
| R20.htm | 44631 | 2012-05-01 16:22:03 |
| R21.htm | 25368 | 2012-05-01 16:22:03 |
| R22.htm | 28022 | 2012-05-01 16:22:03 |
| R23.htm | 14966 | 2012-05-01 16:22:03 |
| R24.htm | 15077 | 2012-05-01 16:22:03 |
| R25.htm | 22892 | 2012-05-01 16:22:03 |
| R26.htm | 11397 | 2012-05-01 16:22:03 |
| R27.htm | 26858 | 2012-05-01 16:22:03 |
| R28.htm | 16380 | 2012-05-01 16:22:03 |
| R29.htm | 19325 | 2012-05-01 16:22:03 |
| R3.htm | 52740 | 2012-05-01 16:22:03 |
| R30.htm | 29086 | 2012-05-01 16:22:03 |
| R31.htm | 12056 | 2012-05-01 16:22:03 |
| R32.htm | 43756 | 2012-05-01 16:22:03 |
| R33.htm | 103868 | 2012-05-01 16:22:03 |
| R34.htm | 86908 | 2012-05-01 16:22:03 |
| R35.htm | 36916 | 2012-05-01 16:22:03 |
| R36.htm | 13068 | 2012-05-01 16:22:03 |
| R37.htm | 20953 | 2012-05-01 16:22:03 |
| R38.htm | 46911 | 2012-05-01 16:22:03 |
| R39.htm | 17052 | 2012-05-01 16:22:03 |
| R4.htm | 10929 | 2012-05-01 16:22:03 |
| R40.htm | 29053 | 2012-05-01 16:22:03 |
| R41.htm | 4739 | 2012-05-01 16:22:03 |
| R42.htm | 20180 | 2012-05-01 16:22:03 |
| R43.htm | 20448 | 2012-05-01 16:22:03 |
| R44.htm | 34476 | 2012-05-01 16:22:03 |
| R45.htm | 18711 | 2012-05-01 16:22:03 |
| R46.htm | 11983 | 2012-05-01 16:22:03 |
| R47.htm | 22633 | 2012-05-01 16:22:03 |
| R48.htm | 9793 | 2012-05-01 16:22:03 |
| R49.htm | 14802 | 2012-05-01 16:22:03 |
| R5.htm | 140938 | 2012-05-01 16:22:03 |
| R50.htm | 79968 | 2012-05-01 16:22:03 |
| R51.htm | 13319 | 2012-05-01 16:22:03 |
| R52.htm | 63304 | 2012-05-01 16:22:03 |
| R53.htm | 14539 | 2012-05-01 16:22:03 |
| R54.htm | 17142 | 2012-05-01 16:22:03 |
| R55.htm | 16762 | 2012-05-01 16:22:03 |
| R56.htm | 35764 | 2012-05-01 16:22:03 |
| R57.htm | 35413 | 2012-05-01 16:22:03 |
| R58.htm | 9728 | 2012-05-01 16:22:03 |
| R59.htm | 30605 | 2012-05-01 16:22:03 |
| R6.htm | 10100 | 2012-05-01 16:22:03 |
| R60.htm | 14145 | 2012-05-01 16:22:03 |
| R61.htm | 46795 | 2012-05-01 16:22:03 |
| R62.htm | 50920 | 2012-05-01 16:22:03 |
| R63.htm | 16928 | 2012-05-01 16:22:03 |
| R64.htm | 21566 | 2012-05-01 16:22:03 |
| R65.htm | 22003 | 2012-05-01 16:22:03 |
| R66.htm | 30728 | 2012-05-01 16:22:03 |
| R67.htm | 41535 | 2012-05-01 16:22:03 |
| R68.htm | 23296 | 2012-05-01 16:22:03 |
| R69.htm | 22253 | 2012-05-01 16:22:03 |
| R7.htm | 100093 | 2012-05-01 16:22:03 |
| R70.htm | 9823 | 2012-05-01 16:22:03 |
| R71.htm | 22383 | 2012-05-01 16:22:03 |
| R72.htm | 34041 | 2012-05-01 16:22:03 |
| R73.htm | 16149 | 2012-05-01 16:22:03 |
| R74.htm | 59788 | 2012-05-01 16:22:03 |
| R75.htm | 23303 | 2012-05-01 16:22:03 |
| R76.htm | 40399 | 2012-05-01 16:22:03 |
| R77.htm | 39160 | 2012-05-01 16:22:03 |
| R78.htm | 4816 | 2012-05-01 16:22:03 |
| R8.htm | 12200 | 2012-05-01 16:22:03 |
| R9.htm | 20833 | 2012-05-01 16:22:03 |
| report.css | 2721 | 2012-05-01 16:22:03 |
| Show.js | 6423 | 2012-05-01 16:22:03 |