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|---|---|---|
 0001193125-23-221277-index-headers.html | 2023-08-25 13:24:56 | |
| 0001193125-23-221277-index.html | 2023-08-25 13:24:56 | |
| 0001193125-23-221277.txt | 2023-08-25 13:24:56 | |
 0001193125-23-221277-xbrl.zip | 246081 | 2023-08-25 13:24:56 |
| bf1-20230825.xsd | 6688 | 2023-08-25 13:24:56 |
| bf1-20230825_cal.xml | 4678 | 2023-08-25 13:24:56 |
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| bf1-20230825_lab.xml | 145345 | 2023-08-25 13:24:56 |
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| d423314d485bpos.htm | 1593268 | 2023-08-25 13:24:56 |
| d423314d485bpos_htm.xml | 46323 | 2023-08-25 13:24:56 |
| d423314dex9910a.htm | 2014 | 2023-08-25 13:24:56 |
| FilingSummary.xml | 2559 | 2023-08-25 13:24:56 |
 g423314dsp04a.jpg | 2161 | 2023-08-25 13:24:56 |
 g423314g56p99.jpg | 40795 | 2023-08-25 13:24:56 |
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| R1.htm | 17990 | 2023-08-25 13:24:56 |
| R2.htm | 121028 | 2023-08-25 13:24:56 |
| report.css | 2767 | 2023-08-25 13:24:56 |
| Show.js | 1085 | 2023-08-25 13:24:56 |