Parent Directory| Name | Size | Last Modified |
|---|---|---|
 0001193125-20-008109-index-headers.html | 2020-01-15 16:32:09 | |
| 0001193125-20-008109-index.html | 2020-01-15 16:32:09 | |
| 0001193125-20-008109.txt | 2020-01-15 16:32:09 | |
 0001193125-20-008109-xbrl.zip | 8464 | 2020-01-15 16:32:09 |
| btu-20200102.xsd | 3057 | 2020-01-15 16:32:09 |
| btu-20200102_lab.xml | 18080 | 2020-01-15 16:32:09 |
| btu-20200102_pre.xml | 11377 | 2020-01-15 16:32:09 |
| d873266d8ka.htm | 26943 | 2020-01-15 16:32:09 |
| d873266d8ka_htm.xml | 4148 | 2020-01-15 16:32:09 |
| FilingSummary.xml | 1704 | 2020-01-15 16:32:09 |
| Financial_Report.xlsx | 6098 | 2020-01-15 16:32:09 |
| MetaLinks.json | 18949 | 2020-01-15 16:32:09 |
| R1.htm | 40799 | 2020-01-15 16:32:09 |
| report.css | 2766 | 2020-01-15 16:32:09 |
| Show.js | 1085 | 2020-01-15 16:32:09 |