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 | us-gaap:InvestmentHoldingsOtherThanSecuritiesTable | all | http://fasb.org/us-gaap/role/disclosure/OtherThanSecuritiesInvestmentHoldingsInvestmentHoldingsOtherThanSecuritiesTable |
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 | us-gaap:InvestmentOwnedUnderlyingFaceAmountAtMarketValue | domain-member | http://fasb.org/us-gaap/role/disclosure/OtherThanSecuritiesInvestmentHoldingsInvestmentHoldingsOtherThanSecuritiesTable |
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