Parent Directory| Name | Size | Last Modified |
|---|---|---|
 0001193125-20-140578-index-headers.html | 2020-05-12 17:06:10 | |
| 0001193125-20-140578-index.html | 2020-05-12 17:06:10 | |
| 0001193125-20-140578.txt | 2020-05-12 17:06:10 | |
 0001193125-20-140578-xbrl.zip | 10231 | 2020-05-12 17:06:10 |
| btu-20200507.xsd | 3081 | 2020-05-12 17:06:10 |
| btu-20200507_lab.xml | 17373 | 2020-05-12 17:06:10 |
| btu-20200507_pre.xml | 10961 | 2020-05-12 17:06:10 |
| d876901d8k.htm | 61849 | 2020-05-12 17:06:10 |
| d876901d8k_htm.xml | 3276 | 2020-05-12 17:06:10 |
| FilingSummary.xml | 1694 | 2020-05-12 17:06:10 |
| Financial_Report.xlsx | 5786 | 2020-05-12 17:06:10 |
| MetaLinks.json | 18330 | 2020-05-12 17:06:10 |
| R1.htm | 38615 | 2020-05-12 17:06:10 |
| report.css | 2767 | 2020-05-12 17:06:10 |
| Show.js | 1084 | 2020-05-12 17:06:10 |