0000001 - Document - Cover link:presentationLink link:calculationLink link:definitionLink 9952151 - Statement - CONSOLIDATED CONDENSED BALANCE SHEETS (Unaudited) link:presentationLink link:calculationLink link:definitionLink 9952152 - Statement - CONSOLIDATED CONDENSED BALANCE SHEETS (Unaudited) (Parenthetical) link:presentationLink link:calculationLink link:definitionLink 9952153 - Statement - CONSOLIDATED CONDENSED STATEMENTS OF OPERATIONS (Unaudited) link:presentationLink link:calculationLink link:definitionLink 9952154 - Statement - CONSOLIDATED CONDENSED STATEMENTS OF OPERATIONS (Unaudited) (Parenthetical) link:presentationLink link:calculationLink link:definitionLink 9952155 - Statement - CONSOLIDATED CONDENSED STATEMENTS OF COMPREHENSIVE INCOME (LOSS) (Unaudited) link:presentationLink link:calculationLink link:definitionLink 9952156 - Statement - CONSOLIDATED CONDENSED STATEMENTS OF EQUITY (Unaudited) link:presentationLink link:calculationLink link:definitionLink 9952157 - Statement - CONSOLIDATED CONDENSED STATEMENTS OF EQUITY (Unaudited) (Parenthetical) link:presentationLink link:calculationLink link:definitionLink 9952158 - Statement - CONSOLIDATED CONDENSED STATEMENTS OF CASH FLOWS (Unaudited) link:presentationLink link:calculationLink link:definitionLink 9952159 - Disclosure - Basis of Presentation link:presentationLink link:calculationLink link:definitionLink 9952160 - Disclosure - Acquisitions link:presentationLink link:calculationLink link:definitionLink 9952161 - Disclosure - Investments link:presentationLink link:calculationLink link:definitionLink 9952162 - Disclosure - Fair Value link:presentationLink link:calculationLink link:definitionLink 9952163 - Disclosure - Claim and Claim Adjustment Expense Reserves link:presentationLink link:calculationLink link:definitionLink 9952164 - Disclosure - Future Policy Benefits Reserves link:presentationLink link:calculationLink link:definitionLink 9952165 - Disclosure - Shareholders' Equity link:presentationLink link:calculationLink link:definitionLink 9952166 - Disclosure - Debt link:presentationLink link:calculationLink link:definitionLink 9952167 - Disclosure - Revenue from Contracts with Customers link:presentationLink link:calculationLink link:definitionLink 9952168 - Disclosure - Benefit Plans link:presentationLink link:calculationLink link:definitionLink 9952169 - Disclosure - Legal Proceedings link:presentationLink link:calculationLink link:definitionLink 9952170 - Disclosure - Commitments and Contingencies link:presentationLink link:calculationLink link:definitionLink 9952171 - Disclosure - Segments link:presentationLink link:calculationLink link:definitionLink 9955511 - Disclosure - Basis of Presentation (Policies) link:presentationLink link:calculationLink link:definitionLink 9955512 - Disclosure - Investments (Tables) link:presentationLink link:calculationLink link:definitionLink 9955513 - Disclosure - Fair Value (Tables) link:presentationLink link:calculationLink link:definitionLink 9955514 - Disclosure - Claim and Claim Adjustment Expense Reserves (Tables) link:presentationLink link:calculationLink link:definitionLink 9955515 - Disclosure - Future Policy Benefits Reserves (Tables) link:presentationLink link:calculationLink link:definitionLink 9955516 - Disclosure - Shareholders' Equity (Tables) link:presentationLink link:calculationLink link:definitionLink 9955517 - Disclosure - Revenue from Contracts with Customers (Tables) link:presentationLink link:calculationLink link:definitionLink 9955518 - Disclosure - Benefit Plans (Tables) link:presentationLink link:calculationLink link:definitionLink 9955519 - Disclosure - Segments (Tables) link:presentationLink link:calculationLink link:definitionLink 9955520 - Disclosure - Basis of Presentation (Details) link:presentationLink link:calculationLink link:definitionLink 9955521 - Disclosure - Acquisitions - Boardwalk Pipelines (Details) link:presentationLink link:calculationLink link:definitionLink 9955522 - Disclosure - Investments - Net Investment Income (Details) link:presentationLink link:calculationLink link:definitionLink 9955523 - Disclosure - Investments - Investment Gains (Losses) (Details) link:presentationLink link:calculationLink link:definitionLink 9955524 - Disclosure - Investments - Available-for-sale Impairment Losses (Gains) Recognized in Earnings (Details) link:presentationLink link:calculationLink link:definitionLink 9955525 - Disclosure - Investments - Amortized Cost and Fair Values of Fixed Maturity Securities (Details) link:presentationLink link:calculationLink link:definitionLink 9955526 - Disclosure - Investments - Available-for-sale Securities in Gross Unrealized Loss Position (Details) link:presentationLink link:calculationLink link:definitionLink 9955527 - Disclosure - Investments - Unrealized Loss (Details) link:presentationLink link:calculationLink link:definitionLink 9955528 - Disclosure - Investments - Allowance for Credit Losses (Details) link:presentationLink link:calculationLink link:definitionLink 9955529 - Disclosure - Investments - Available-for-sale Fixed Maturity Securities by Contractual Maturity (Details) link:presentationLink link:calculationLink link:definitionLink 9955530 - Disclosure - Investments - Amortized Cost Basis of Mortgage Loans for Each Credit Quality Indicator by Year of Origination (Details) link:presentationLink link:calculationLink link:definitionLink 9955531 - Disclosure - Investments - Investment Commitments (Details) link:presentationLink link:calculationLink link:definitionLink 9955532 - Disclosure - Fair Value - Assets and Liabilities Measured at Fair Value on Recurring Basis (Details) link:presentationLink link:calculationLink link:definitionLink 9955533 - Disclosure - Fair Value - Reconciliations of Assets and Liabilities Measured at Fair Value on Recurring Basis Using Significant Unobservable Inputs (Details) link:presentationLink link:calculationLink link:definitionLink 9955534 - Disclosure - Fair Value - Significant Unobservable Inputs (Details) link:presentationLink link:calculationLink link:definitionLink 9955535 - Disclosure - Fair Value - Financial Assets and Liabilities not Measured at Fair Value (Details) link:presentationLink link:calculationLink link:definitionLink 9955536 - Disclosure - Claim and Claim Adjustment Expense Reserves - Narratives (Details) link:presentationLink link:calculationLink link:definitionLink 9955537 - Disclosure - Claim and Claim Adjustment Expense Reserves - Reconciliation of Claim and Claim Adjustment Expense Reserves (Details) link:presentationLink link:calculationLink link:definitionLink 9955538 - Disclosure - Claim and Claim Adjustment Expense Reserves - Net Prior Year Loss Reserve Development in Property and Casualty Operations (Details) link:presentationLink link:calculationLink link:definitionLink 9955539 - Disclosure - Claim and Claim Adjustment Expense Reserves - A&EP Reserves (Details) link:presentationLink link:calculationLink link:definitionLink 9955540 - Disclosure - Future Policy Benefits Reserves - Balances and Changes (Details) link:presentationLink link:calculationLink link:definitionLink 9955541 - Disclosure - Future Policy Benefits Reserves - Earned Premiums and Interest Expense (Details) link:presentationLink link:calculationLink link:definitionLink 9955542 - Disclosure - Future Policy Benefits Reserves - Undiscounted Expected Future Benefit and Expense Payments and Undiscounted Expected Future Gross Premiums (Details) link:presentationLink link:calculationLink link:definitionLink 9955543 - Disclosure - Future Policy Benefits Reserves - Narratives (Details) link:presentationLink link:calculationLink link:definitionLink 9955544 - Disclosure - Future Policy Benefits Reserves - Weighted Average Interest Rates (Details) link:presentationLink link:calculationLink link:definitionLink 9955545 - Disclosure - Shareholders' Equity - Components of Accumulated Other Comprehensive Income (Loss) (Details) link:presentationLink link:calculationLink link:definitionLink 9955546 - Disclosure - Shareholders' Equity - Narratives (Details) link:presentationLink link:calculationLink link:definitionLink 9955547 - Disclosure - Debt (Details) link:presentationLink link:calculationLink link:definitionLink 9955548 - Disclosure - Revenue from Contracts with Customers - Disaggregation of Revenue (Details) link:presentationLink link:calculationLink link:definitionLink 9955549 - Disclosure - Revenue from Contracts with Customers - Narratives (Details) link:presentationLink link:calculationLink link:definitionLink 9955549 - Disclosure - Revenue from Contracts with Customers - Narratives (Details) link:presentationLink link:calculationLink link:definitionLink 9955550 - Disclosure - Revenue from Contracts with Customers - Performance Obligations (Details) link:presentationLink link:calculationLink link:definitionLink 9955550 - Disclosure - Revenue from Contracts with Customers - Performance Obligations (Details) link:presentationLink link:calculationLink link:definitionLink 9955551 - Disclosure - Benefit Plans (Details) link:presentationLink link:calculationLink link:definitionLink 9955552 - Disclosure - Legal Proceedings (Details) link:presentationLink link:calculationLink link:definitionLink 9955553 - Disclosure - Commitments and Contingencies (Details) link:presentationLink link:calculationLink link:definitionLink 9955554 - Disclosure - Segments (Details) link:presentationLink link:calculationLink link:definitionLink