Parent Directory| Name | Size | Last Modified |
|---|---|---|
 0001193125-19-247381-index-headers.html | 2019-09-18 07:54:14 | |
| 0001193125-19-247381-index.html | 2019-09-18 07:54:14 | |
| 0001193125-19-247381.txt | 2019-09-18 07:54:14 | |
 0001193125-19-247381-xbrl.zip | 8094 | 2019-09-18 07:54:14 |
| btu-20190917.xsd | 3081 | 2019-09-18 07:54:14 |
| btu-20190917_lab.xml | 17373 | 2019-09-18 07:54:14 |
| btu-20190917_pre.xml | 10961 | 2019-09-18 07:54:14 |
| d806191d8k.htm | 25523 | 2019-09-18 07:54:14 |
| d806191d8k_htm.xml | 3276 | 2019-09-18 07:54:14 |
| FilingSummary.xml | 1694 | 2019-09-18 07:54:14 |
| Financial_Report.xlsx | 5788 | 2019-09-18 07:54:14 |
| MetaLinks.json | 18360 | 2019-09-18 07:54:14 |
| R1.htm | 38615 | 2019-09-18 07:54:14 |
| report.css | 2766 | 2019-09-18 07:54:14 |
| Show.js | 1084 | 2019-09-18 07:54:14 |