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|---|---|---|
 0001193125-20-240753-index-headers.html | 2020-09-08 11:49:20 | |
| 0001193125-20-240753-index.html | 2020-09-08 11:49:20 | |
| 0001193125-20-240753.txt | 2020-09-08 11:49:20 | |
 0001193125-20-240753-xbrl.zip | 112347 | 2020-09-08 11:49:20 |
| bf1-20200818.xml | 169643 | 2020-09-08 11:49:20 |
| bf1-20200818.xsd | 23415 | 2020-09-08 11:49:20 |
| bf1-20200818_cal.xml | 4756 | 2020-09-08 11:49:20 |
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| bf1-20200818_lab.xml | 152644 | 2020-09-08 11:49:20 |
| bf1-20200818_pre.xml | 661966 | 2020-09-08 11:49:20 |
| d884320d485bpos.htm | 32869 | 2020-09-08 11:49:20 |
| FilingSummary.xml | 7980 | 2020-09-08 11:49:20 |
 g884320g52p17.jpg | 2150 | 2020-09-08 11:49:20 |
| R1.htm | 18250 | 2020-09-08 11:49:20 |
| R11.htm | 125650 | 2020-09-08 11:49:20 |
| R12.htm | 75035 | 2020-09-08 11:49:20 |
| R15.htm | 98589 | 2020-09-08 11:49:20 |
| R16.htm | 79403 | 2020-09-08 11:49:20 |
| R19.htm | 102954 | 2020-09-08 11:49:20 |
| R2.htm | 87513 | 2020-09-08 11:49:20 |
| R20.htm | 7482 | 2020-09-08 11:49:20 |
| R6.htm | 121279 | 2020-09-08 11:49:20 |
| R7.htm | 91881 | 2020-09-08 11:49:20 |
| report.css | 2767 | 2020-09-08 11:49:20 |
| Show.js | 1085 | 2020-09-08 11:49:20 |