 | us-gaap:RevenuesAbstract | parent-child | http://fasb.org/us-gaap/role/statement/StatementOfIncomeAlternative |
 | us-gaap:RevenuesAbstract | domain-member | http://fasb.org/us-gaap/role/statement/StatementOfIncomeAlternativeStatementTable |
 | us-gaap:RevenuesAbstract | parent-child | http://fasb.org/us-gaap/role/statement/StatementOfIncomeRealEstateExcludingREITs |
 | us-gaap:RevenuesAbstract | domain-member | http://fasb.org/us-gaap/role/statement/StatementOfIncomeRealEstateExcludingREITsStatementTable |
 | us-gaap:RevenuesAbstract | parent-child | http://fasb.org/us-gaap/role/statement/StatementOfIncomeRealEstateInvestmentTrusts |
 | us-gaap:RevenuesAbstract | domain-member | http://fasb.org/us-gaap/role/statement/StatementOfIncomeRealEstateInvestmentTrustsStatementTable |
 | us-gaap:RevenuesAbstract | parent-child | http://fasb.org/us-gaap/role/statement/StatementOfIncome |
 | us-gaap:Revenues | summation-item | http://fasb.org/us-gaap/role/statement/StatementOfIncome |
 | us-gaap:NoninterestIncome | summation-item | http://fasb.org/us-gaap/role/statement/StatementOfIncomeFirstAlternative |
 | us-gaap:RevenuesAbstract | domain-member | http://fasb.org/us-gaap/role/statement/StatementOfIncomeStatementTable |
 | us-gaap:NoninterestIncomeAbstract | parent-child | http://fasb.org/us-gaap/role/statement/StatementOfIncomeInterestBasedRevenue |
 | us-gaap:NoninterestIncomeAbstract | domain-member | http://fasb.org/us-gaap/role/statement/StatementOfIncomeInterestBasedRevenueStatementTable |
 | us-gaap:ReinsurancePremiumsForInsuranceCompaniesByProductSegmentNetAmountAbstract | parent-child | http://fasb.org/us-gaap/role/statement/StatementOfIncomeInsuranceBasedRevenue |
 | us-gaap:ReinsurancePremiumsForInsuranceCompaniesByProductSegmentNetAmountAbstract | domain-member | http://fasb.org/us-gaap/role/statement/StatementOfIncomeInsuranceBasedRevenueStatementTable |
 | us-gaap:InsuranceServicesRevenueAbstract | parent-child | http://fasb.org/us-gaap/role/disclosure/FinancialServicesBrokersAndDealers |
 | us-gaap:InsuranceServicesRevenue | summation-item | http://fasb.org/us-gaap/role/disclosure/FinancialServicesBrokersAndDealers |
 | us-gaap:ReinsurancePremiumsForInsuranceCompaniesByProductSegmentNetAmountAbstract | parent-child | http://fasb.org/us-gaap/role/disclosure/FinancialServicesInsurance |
 | us-gaap:ReinsurancePremiumsForInsuranceCompaniesByProductSegmentNetAmountAbstract | domain-member | http://fasb.org/us-gaap/role/disclosure/FinancialServicesInsuranceEffectsOfReinsuranceTable |
 | us-gaap:ReinsurancePremiumsForInsuranceCompaniesByProductSegmentNetAmountAbstract | parent-child | http://fasb.org/us-gaap/role/disclosure/SECScheduleArticle12-17Reinsurance |
 | us-gaap:ReinsurancePremiumsForInsuranceCompaniesByProductSegmentNetAmountAbstract | domain-member | http://fasb.org/us-gaap/role/disclosure/SECScheduleArticle12-17ReinsuranceReinsurancePremiumsForInsuranceCompaniesByProductSegmentTable |