Deferrable Notes [Member]

NameDeferrableNotesMember
Namespacehttp://fasb.org/us-gaap/2020-01-31
Prefixus-gaap
Data typenonnum:domainItemType
Period typeduration
Substitution Groupxbrli:item
BalanceNone
NillableTrue
AbstractTrue

Labels

TextLangRoleContainer role
Deferrable Notes [Member]en-UShttp://www.xbrl.org/2003/role/labelhttp://www.xbrl.org/2003/role/link
Deferrable Notes or Deferred Interest Notes defer interest payments until some future date. They are similar to a zero coupon bond except that interest is paid at some future date.en-UShttp://www.xbrl.org/2003/role/documentationhttp://www.xbrl.org/2003/role/link

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NameRelation TypeRole
us-gaap:FixedIncomeInvestmentsMember
parent-childhttp://fasb.org/us-gaap/role/disclosure/InvestmentHoldings
us-gaap:FixedIncomeInvestmentsMember
domain-memberhttp://fasb.org/us-gaap/role/disclosure/InvestmentHoldings
us-gaap:FixedIncomeInvestmentsMember
parent-childhttp://fasb.org/us-gaap/role/disclosure/InvestmentsSoldNotYetPurchased
us-gaap:FixedIncomeInvestmentsMember
domain-memberhttp://fasb.org/us-gaap/role/disclosure/InvestmentsSoldNotYetPurchasedInvestmentsSoldNotYetPurchasedTable
us-gaap:FixedIncomeInvestmentsMember
parent-childhttp://fasb.org/us-gaap/role/disclosure/SummaryOfInvestmentHoldings
us-gaap:FixedIncomeInvestmentsMember
domain-memberhttp://fasb.org/us-gaap/role/disclosure/SummaryOfInvestmentHoldings
us-gaap:FixedIncomeInvestmentsMember
parent-childhttp://fasb.org/us-gaap/role/disclosure/OtherThanSecuritiesInvestmentHoldings
us-gaap:FixedIncomeInvestmentsMember
domain-memberhttp://fasb.org/us-gaap/role/disclosure/OtherThanSecuritiesInvestmentHoldingsInvestmentHoldingsOtherThanSecuritiesTable
us-gaap:FixedIncomeInvestmentsMember
parent-childhttp://fasb.org/us-gaap/role/disclosure/InvestmentsFederalTaxNote
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domain-memberhttp://fasb.org/us-gaap/role/disclosure/InvestmentsFederalTaxNoteFederalIncomeTaxNoteTable
us-gaap:FixedIncomeInvestmentsMember
parent-childhttp://fasb.org/us-gaap/role/disclosure/FinancialServicesInvestmentCompany
us-gaap:FixedIncomeInvestmentsMember
domain-memberhttp://fasb.org/us-gaap/role/disclosure/FinancialServicesInvestmentCompanyInvestmentHoldingsTable