Parent Directory| Name | Size | Last Modified |
|---|---|---|
 0001193125-20-098208-index-headers.html | 2020-04-03 16:31:10 | |
| 0001193125-20-098208-index.html | 2020-04-03 16:31:10 | |
| 0001193125-20-098208.txt | 2020-04-03 16:31:10 | |
 0001193125-20-098208-xbrl.zip | 9254 | 2020-04-03 16:31:10 |
| btu-20200403.xsd | 3082 | 2020-04-03 16:31:10 |
| btu-20200403_lab.xml | 17374 | 2020-04-03 16:31:10 |
| btu-20200403_pre.xml | 10962 | 2020-04-03 16:31:10 |
| d902397d8k.htm | 28458 | 2020-04-03 16:31:10 |
| d902397d8k_htm.xml | 3276 | 2020-04-03 16:31:10 |
| FilingSummary.xml | 1694 | 2020-04-03 16:31:10 |
| Financial_Report.xlsx | 5787 | 2020-04-03 16:31:10 |
| MetaLinks.json | 18330 | 2020-04-03 16:31:10 |
| R1.htm | 38616 | 2020-04-03 16:31:10 |
| report.css | 2767 | 2020-04-03 16:31:10 |
| Show.js | 1084 | 2020-04-03 16:31:10 |