Parent Directory| Name | Size | Last Modified |
|---|---|---|
 0001193125-20-065151-index-headers.html | 2020-03-06 16:36:09 | |
| 0001193125-20-065151-index.html | 2020-03-06 16:36:09 | |
| 0001193125-20-065151.txt | 2020-03-06 16:36:09 | |
 0001193125-20-065151-xbrl.zip | 7760 | 2020-03-06 16:36:09 |
| btu-20200302.xsd | 3081 | 2020-03-06 16:36:09 |
| btu-20200302_lab.xml | 17373 | 2020-03-06 16:36:09 |
| btu-20200302_pre.xml | 10961 | 2020-03-06 16:36:09 |
| d826827d8k.htm | 24095 | 2020-03-06 16:36:09 |
| d826827d8k_htm.xml | 3276 | 2020-03-06 16:36:09 |
| FilingSummary.xml | 1699 | 2020-03-06 16:36:09 |
| Financial_Report.xlsx | 5786 | 2020-03-06 16:36:09 |
| MetaLinks.json | 18330 | 2020-03-06 16:36:09 |
| R1.htm | 38622 | 2020-03-06 16:36:09 |
| report.css | 2766 | 2020-03-06 16:36:09 |
| Show.js | 1085 | 2020-03-06 16:36:09 |