| Incremental Effects on Balance Sheet, Application of FAS 158 Recognition Provisions [Roll Forward] |
| IncrementalEffectsonBalanceSheetApplicationOfFAS158RecognitionProvisions |
| PostEmploymentButPreRetirementCosts |
| Disclosure of the balances of individual asset, liability, or equity line items in the year-end statement of financial position of the recognition provisions of FAS 158 in the year of initial application. |
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| Detail |
| [Roll Forward] |
| Not started |
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| us-gaap:ScheduleOfIncrementalEffectsOnBalanceSheetApplicationOfSFAS158RecognitionProvisionsTextBlock |
| http://fasb.org/us-gaap/role/disclosure/CompensationRelatedCostsRetirementBenefits |