| Disclosure Descriptive Information | 
| Label: | Product Warranty Disclosure [Note Level] | 
| Name: | ProductWarrantyDisclosure | 
| Parent Topic: | Contingencies | 
| Documentation: | Entire footnote for standard and extended product warranties and other product guarantee contracts, including a tabular reconciliation of the changes in the guarantor's aggregate product warranty liability for the reporting period. | 
| Commentary: | |
| Status: | |
| US GAAP XBRL Taxonomy Text Block: | us-gaap:ProductWarrantyDisclosureTextBlock | 
| Human Readable Examples: | List of human readable examples | 
| Machine Readable Examples: | List of machine readable examples | 
| Business rules (machine readable): | XBRL Definition Relations | 
| US GAAP XBRL Taxonomy Network: | http://fasb.org/us-gaap/role/disclosure/CommitmentAndContingencies | XML | HTML | 
| References to Accounting Standards Codification (ASC) | 
| Item | Description | Reference | 
|---|---|---|
| 1 | FASB: Topic:460 Subtopic:10 Section:50 Paragraph:8 | http://asc.fasb.org/extlink&oid=6398077&loc=d3e12565-110249 | 
| Example Disclosure | 
| Prototype of Disclosure | 
| Line | Label | Object Class (Data type) | Period Type | Balance | Report Element Name | 
|---|---|---|---|---|---|
| 1 | Footnote [Abstract] | Abstract | added:FootnoteAbstract | ||
| 2 | Product Warranty Disclosure [Text Block] | Concept (Text Block (HTML)) | For Period | us-gaap:ProductWarrantyDisclosureTextBlock | 
| Business Rules Summary | 
| From | Arcrole (predicate) | To | 
|---|---|---|
| disclosures:ProductWarrantyDisclosure | rules-arcroles:disclosure-equivalentTextblock | us-gaap:ProductWarrantyDisclosureTextBlock | 
| disclosures:ProductWarrantyDisclosure | rules-arcroles:disclosure-hasConceptArrangementPattern | fro:TextBlock | 
         
         
         
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