| Report Element Information |
| Run date/time: 6/5/2011 7:34:42 AM |
| Report Element Attributes: |
| Report element from taxonomy prefix: | us-gaap |
| US GAAP taxonomy standard label: | us-gaap: Statement, Business Segments [Axis] |
| Filer taxonomy standard label: | Business Segments [Axis] |
| Documentation: | The business segments reported in a Statement. |
| Balance type: | |
| Period type: | |
| Report element type: | [Axis] |
| Data type: | |
| ID: | us-gaap_StatementBusinessSegmentsAxis |
| Name: | us-gaap:StatementBusinessSegmentsAxis |
| Labels of Report Element: (Labels from filer taxonomy, does not include other labels) |
| Role: | Label | Lang |
| Standard label (http://www.xbrl.org/2003/role/label) | Business Segments [Axis] | en-US |
| References of Report Element, FASB Accounting Standards Codification: |
| Publisher, Name: | Topic | Sub Topic | Glossary | URI |
| FASB, Accounting Standards Codification | 280 | 10 | http://asc.fasb.org/extlink&oid=6534315&loc=d3e8538-108599 |
| References of Report Element, SEC Regulation S-X (SX): |
| Publisher, Name: | Number | Section | Paragraph | Subparagraph | Article |
| References of Report Element, US GAAP Legacy: |
| Publisher: | Name | Number | Chapter | Section | Paragraph | Subparagraph | Article | Clause | Appendix |