Parent Directory| Name | Size | Last Modified |
|---|---|---|
 0001193125-20-194060-index-headers.html | 2020-07-16 17:00:31 | |
| 0001193125-20-194060-index.html | 2020-07-16 17:00:31 | |
| 0001193125-20-194060.txt | 2020-07-16 17:00:31 | |
 0001193125-20-194060-xbrl.zip | 11333 | 2020-07-16 17:00:31 |
| btu-20200715.xsd | 3081 | 2020-07-16 17:00:31 |
| btu-20200715_lab.xml | 17373 | 2020-07-16 17:00:31 |
| btu-20200715_pre.xml | 10961 | 2020-07-16 17:00:31 |
| d41950d8k.htm | 32863 | 2020-07-16 17:00:31 |
| d41950d8k_htm.xml | 3276 | 2020-07-16 17:00:31 |
| d41950dex991.htm | 4714 | 2020-07-16 17:00:31 |
| FilingSummary.xml | 1725 | 2020-07-16 17:00:31 |
| Financial_Report.xlsx | 5456 | 2020-07-16 17:00:31 |
 g41950g0714071222616.jpg | 3080 | 2020-07-16 17:00:31 |
| MetaLinks.json | 18326 | 2020-07-16 17:00:31 |
| R1.htm | 38620 | 2020-07-16 17:00:31 |
| report.css | 2767 | 2020-07-16 17:00:31 |
| Show.js | 1085 | 2020-07-16 17:00:31 |