9952151 - Document - Cover link:presentationLink link:calculationLink link:definitionLink 9952152 - Statement - Condensed Consolidated Balance Sheets link:presentationLink link:calculationLink link:definitionLink 9952153 - Statement - Condensed Consolidated Balance Sheets (Parenthetical) link:presentationLink link:calculationLink link:definitionLink 9952154 - Statement - Condensed Consolidated Statements of Income link:presentationLink link:calculationLink link:definitionLink 9952155 - Statement - Condensed Consolidated Statements of Comprehensive Income link:presentationLink link:calculationLink link:definitionLink 9952156 - Statement - Condensed Consolidated Statements of Comprehensive Income (Parenthetical) link:presentationLink link:calculationLink link:definitionLink 9952157 - Statement - Condensed Consolidated Statements of Shareholders' Equity link:presentationLink link:calculationLink link:definitionLink 9952158 - Statement - Condensed Consolidated Statements of Cash Flows link:presentationLink link:calculationLink link:definitionLink 9952159 - Disclosure - Accounting Policies link:presentationLink link:calculationLink link:definitionLink 9952160 - Disclosure - Investments link:presentationLink link:calculationLink link:definitionLink 9952161 - Disclosure - Fair Value Measurements link:presentationLink link:calculationLink link:definitionLink 9952162 - Disclosure - Property Casualty Loss and Loss Expenses link:presentationLink link:calculationLink link:definitionLink 9952163 - Disclosure - Life Policy and Investment Contract Reserves link:presentationLink link:calculationLink link:definitionLink 9952164 - Disclosure - Deferred Policy Acquisition Costs link:presentationLink link:calculationLink link:definitionLink 9952165 - Disclosure - Accumulated Other Comprehensive Income link:presentationLink link:calculationLink link:definitionLink 9952166 - Disclosure - Reinsurance link:presentationLink link:calculationLink link:definitionLink 9952167 - Disclosure - Income Taxes link:presentationLink link:calculationLink link:definitionLink 9952168 - Disclosure - Net Income Per Common Share link:presentationLink link:calculationLink link:definitionLink 9952169 - Disclosure - Employee Retirement Benefits link:presentationLink link:calculationLink link:definitionLink 9952170 - Disclosure - Commitments and Contingent Liabilities link:presentationLink link:calculationLink link:definitionLink 9952171 - Disclosure - Segment Information link:presentationLink link:calculationLink link:definitionLink 9955511 - Disclosure - Accounting Policies (Policies) link:presentationLink link:calculationLink link:definitionLink 9955512 - Disclosure - Investments (Tables) link:presentationLink link:calculationLink link:definitionLink 9955513 - Disclosure - Fair Value Measurements (Tables) link:presentationLink link:calculationLink link:definitionLink 9955514 - Disclosure - Property Casualty Loss and Loss Expenses (Tables) link:presentationLink link:calculationLink link:definitionLink 9955515 - Disclosure - Life Policy and Investment Contract Reserves (Tables) link:presentationLink link:calculationLink link:definitionLink 9955516 - Disclosure - Deferred Policy Acquisition Costs (Tables) link:presentationLink link:calculationLink link:definitionLink 9955517 - Disclosure - Accumulated Other Comprehensive Income (Tables) link:presentationLink link:calculationLink link:definitionLink 9955518 - Disclosure - Reinsurance (Tables) link:presentationLink link:calculationLink link:definitionLink 9955519 - Disclosure - Income Taxes (Tables) link:presentationLink link:calculationLink link:definitionLink 9955520 - Disclosure - Net Income Per Common Share (Tables) link:presentationLink link:calculationLink link:definitionLink 9955521 - Disclosure - Employee Retirement Benefits (Tables) link:presentationLink link:calculationLink link:definitionLink 9955522 - Disclosure - Segment Information (Tables) link:presentationLink link:calculationLink link:definitionLink 9955523 - Disclosure - Investments - Analysis of Cost or Amortized Cost, Gross Unrealized Gains and Losses and Fair Value for Investments (Details) link:presentationLink link:calculationLink link:definitionLink 9955524 - Disclosure - Investments - Fair Values and Unrealized Losses by Investment Category and by Duration of Securities' Continuous Unrealized Loss Position (Details) link:presentationLink link:calculationLink link:definitionLink 9955525 - Disclosure - Investments - Schedule of Contractual Maturities of Investments (Details) link:presentationLink link:calculationLink link:definitionLink 9955526 - Disclosure - Investments - Realized Investment Gains and Losses and Change in Unrealized Investment Gains and Losses and Other Items (Details) link:presentationLink link:calculationLink link:definitionLink 9955527 - Disclosure - Investments - (Narrative) (Details) link:presentationLink link:calculationLink link:definitionLink 9955528 - Disclosure - Fair Value Measurements - Fair Value Hierarchy for Assets Measured at Fair Value on Recurring Basis (Details) link:presentationLink link:calculationLink link:definitionLink 9955529 - Disclosure - Fair Value Measurements - (Narrative) (Details) link:presentationLink link:calculationLink link:definitionLink 9955530 - Disclosure - Fair Value Measurements - Summary of Book Value and Principal Amounts of Long-Term Debt (Details) link:presentationLink link:calculationLink link:definitionLink 9955531 - Disclosure - Fair Value Measurements - Fair Values of Note Payable and Long-Term Debt (Details) link:presentationLink link:calculationLink link:definitionLink 9955532 - Disclosure - Fair Value Measurements - Fair Value of Life Policy Loans, Deferred Annuities, and Structured Settlements (Details) link:presentationLink link:calculationLink link:definitionLink 9955533 - Disclosure - Property Casualty Loss and Loss Expenses - Consolidated Property Casualty Loss and Loss Expense Reserves (Details) link:presentationLink link:calculationLink link:definitionLink 9955534 - Disclosure - Property Casualty Loss and Loss Expenses - Narrative (Details) link:presentationLink link:calculationLink link:definitionLink 9955535 - Disclosure - Reserves in Addition to Account Balance, Based on Expected No-Lapse Guarantee Benefits and Expected Policy Assessments (Details) link:presentationLink link:calculationLink link:definitionLink 9955536 - Disclosure - Liability for Future Policy Benefit (Details) link:presentationLink link:calculationLink link:definitionLink 9955537 - Disclosure - Life Policy and Investment Contract Reserves (Narrative) (Details) link:presentationLink link:calculationLink link:definitionLink 9955538 - Disclosure - Undiscounted and Discounted Future Benefit Payments and Gross Premiums (Details) link:presentationLink link:calculationLink link:definitionLink 9955539 - Disclosure - Revenue and Interest Recognized in Income (Details) link:presentationLink link:calculationLink link:definitionLink 9955540 - Disclosure - Weighted Average Interest Rate for Life Policy Products (Details) link:presentationLink link:calculationLink link:definitionLink 9955541 - Disclosure - Changes in Policyholders' Account Balances (Details) link:presentationLink link:calculationLink link:definitionLink 9955542 - Disclosure - Account Values by Range of Guaranteed Minimum Crediting Rates (Details) link:presentationLink link:calculationLink link:definitionLink 9955543 - Disclosure - Other Additional Liability Rollforward (Details) link:presentationLink link:calculationLink link:definitionLink 9955544 - Disclosure - Separate Account Balances and Changes (Details) link:presentationLink link:calculationLink link:definitionLink 9955545 - Disclosure - Deferred Policy Acquisition Costs - Deferred Policy Acquisition Costs and Asset Reconciliation (Detail) link:presentationLink link:calculationLink link:definitionLink 9955546 - Disclosure - Deferred Policy Acquisition Costs - Life Deferred Acquisition Costs Rollforward by Product (Details) link:presentationLink link:calculationLink link:definitionLink 9955547 - Disclosure - Accumulated Other Comprehensive Income (AOCI) (Details) link:presentationLink link:calculationLink link:definitionLink 9955548 - Disclosure - Reinsurance - Consolidated Property Casualty Insurance Assumed and Ceded Business (Details) link:presentationLink link:calculationLink link:definitionLink 9955549 - Disclosure - Reinsurance - Life Insurance Ceded Business (Details) link:presentationLink link:calculationLink link:definitionLink 9955550 - Disclosure - Reinsurance (Narrative) (Details) link:presentationLink link:calculationLink link:definitionLink 9955551 - Disclosure - Income Taxes (Narrative) (Details) link:presentationLink link:calculationLink link:definitionLink 9955552 - Disclosure - Income Taxes - Differences Between Statutory Income Tax Rate and Effective Income Tax Rate (Details) link:presentationLink link:calculationLink link:definitionLink 9955553 - Disclosure - Net Income Per Common Share - Calculations for Basic and Diluted Earnings Per Share (Details) link:presentationLink link:calculationLink link:definitionLink 9955554 - Disclosure - Employee Retirement Benefits - Components of Net Periodic Costs for Qualified and Supplemental Pension Plans (Details) link:presentationLink link:calculationLink link:definitionLink 9955555 - Disclosure - Employee Retirement Benefits - Defined Contribution Plan (Narrative) (Details) link:presentationLink link:calculationLink link:definitionLink 9955556 - Disclosure - Segment Information - Narrative (Details) link:presentationLink link:calculationLink link:definitionLink 9955557 - Disclosure - Segment Information ( Segment Income (Loss) Before Income Taxes) (Details) link:presentationLink link:calculationLink link:definitionLink 9955558 - Disclosure - Segment Information (Reconciliation to Consolidated Income Before Income Taxes) (Details) link:presentationLink link:calculationLink link:definitionLink 9955559 - Disclosure - Segment Information (Reconciliation of Assets from segments to Consolidated) (Details) link:presentationLink link:calculationLink link:definitionLink