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|---|---|---|
 0001193125-22-248355-index-headers.html | 2022-09-21 15:28:41 | |
| 0001193125-22-248355-index.html | 2022-09-21 15:28:41 | |
| 0001193125-22-248355.txt | 2022-09-21 15:28:41 | |
 0001193125-22-248355-xbrl.zip | 515388 | 2022-09-21 15:28:41 |
| bf1-20220921.xsd | 5516 | 2022-09-21 15:28:41 |
| bf1-20220921_cal.xml | 4678 | 2022-09-21 15:28:41 |
| bf1-20220921_def.xml | 165192 | 2022-09-21 15:28:41 |
| bf1-20220921_lab.xml | 139002 | 2022-09-21 15:28:41 |
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| d369721d485bpos.htm | 2857201 | 2022-09-21 15:28:41 |
| d369721d485bpos_htm.xml | 94952 | 2022-09-21 15:28:41 |
| d369721dex9910a.htm | 2032 | 2022-09-21 15:28:41 |
| FilingSummary.xml | 3391 | 2022-09-21 15:28:41 |
 g369721g07y97.jpg | 40795 | 2022-09-21 15:28:41 |
 g369721g1g56p99.jpg | 40795 | 2022-09-21 15:28:41 |
 g369721g56p99.jpg | 40795 | 2022-09-21 15:28:41 |
 g369721g75b21.jpg | 3766 | 2022-09-21 15:28:41 |
| MetaLinks.json | 264222 | 2022-09-21 15:28:41 |
| R1.htm | 18022 | 2022-09-21 15:28:41 |
| R2.htm | 132757 | 2022-09-21 15:28:41 |
| R3.htm | 108405 | 2022-09-21 15:28:41 |
| report.css | 2767 | 2022-09-21 15:28:41 |
| Show.js | 1085 | 2022-09-21 15:28:41 |