Parent Directory| Name | Size | Last Modified |
|---|---|---|
 0001193125-20-264779-index-headers.html | 2020-10-06 16:31:01 | |
| 0001193125-20-264779-index.html | 2020-10-06 16:31:01 | |
| 0001193125-20-264779.txt | 2020-10-06 16:31:01 | |
 0001193125-20-264779-xbrl.zip | 10428 | 2020-10-06 16:31:01 |
| btu-20200930.xsd | 3081 | 2020-10-06 16:31:01 |
| btu-20200930_lab.xml | 17373 | 2020-10-06 16:31:01 |
| btu-20200930_pre.xml | 10961 | 2020-10-06 16:31:01 |
| d13512d8k.htm | 26111 | 2020-10-06 16:31:01 |
| d13512d8k_htm.xml | 3276 | 2020-10-06 16:31:01 |
| d13512dex101.htm | 7731 | 2020-10-06 16:31:01 |
| FilingSummary.xml | 1725 | 2020-10-06 16:31:01 |
| Financial_Report.xlsx | 5455 | 2020-10-06 16:31:01 |
| MetaLinks.json | 18354 | 2020-10-06 16:31:01 |
| R1.htm | 38620 | 2020-10-06 16:31:01 |
| report.css | 2767 | 2020-10-06 16:31:01 |
| Show.js | 1084 | 2020-10-06 16:31:01 |