0000001 - Document - Cover Page link:presentationLink link:calculationLink link:definitionLink 9952151 - Statement - Consolidated Balance Sheets link:presentationLink link:calculationLink link:definitionLink 9952152 - Statement - Consolidated Balance Sheets (Parenthetical) link:presentationLink link:calculationLink link:definitionLink 9952153 - Statement - Consolidated Statements of Income link:presentationLink link:calculationLink link:definitionLink 9952154 - Statement - Consolidated Statements of Comprehensive Income link:presentationLink link:calculationLink link:definitionLink 9952155 - Statement - Consolidated Statements of Cash Flows link:presentationLink link:calculationLink link:definitionLink 9952156 - Statement - Consolidated Statements of Changes in Equity link:presentationLink link:calculationLink link:definitionLink 9952157 - Disclosure - Organization link:presentationLink link:calculationLink link:definitionLink 9952158 - Disclosure - Basis of Presentation and Significant Accounting Policies link:presentationLink link:calculationLink link:definitionLink 9952159 - Disclosure - Operating Model Transformation link:presentationLink link:calculationLink link:definitionLink 9952160 - Disclosure - Investments link:presentationLink link:calculationLink link:definitionLink 9952161 - Disclosure - Derivative Financial Instruments link:presentationLink link:calculationLink link:definitionLink 9952162 - Disclosure - Fair Value link:presentationLink link:calculationLink link:definitionLink 9952163 - Disclosure - Income Taxes link:presentationLink link:calculationLink link:definitionLink 9952164 - Disclosure - Medical Claims Payable link:presentationLink link:calculationLink link:definitionLink 9952165 - Disclosure - Debt link:presentationLink link:calculationLink link:definitionLink 9952166 - Disclosure - Commitments and Contingencies link:presentationLink link:calculationLink link:definitionLink 9952167 - Disclosure - Capital Stock link:presentationLink link:calculationLink link:definitionLink 9952168 - Disclosure - Shareholders' Earnings per Share link:presentationLink link:calculationLink link:definitionLink 9952169 - Disclosure - Segment Information link:presentationLink link:calculationLink link:definitionLink 9955511 - Disclosure - Basis of Presentation and Significant Accounting Policies (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 - Medical Claims Payable (Tables) link:presentationLink link:calculationLink link:definitionLink 9955515 - Disclosure - Debt (Tables) link:presentationLink link:calculationLink link:definitionLink 9955516 - Disclosure - Capital Stock (Tables) link:presentationLink link:calculationLink link:definitionLink 9955517 - Disclosure - Shareholders' Earnings per Share (Tables) link:presentationLink link:calculationLink link:definitionLink 9955518 - Disclosure - Segment Information (Tables) link:presentationLink link:calculationLink link:definitionLink 9955519 - Disclosure - Organization (Details) link:presentationLink link:calculationLink link:definitionLink 9955520 - Disclosure - Basis of Presentation and Significant Accounting Policies (Details) link:presentationLink link:calculationLink link:definitionLink 9955521 - Disclosure - Operating Model Transformation (Details) link:presentationLink link:calculationLink link:definitionLink 9955522 - Disclosure - Investments - Schedule of Current and Long-Term Fixed Maturity Securities, Available-For-Sale (Details) link:presentationLink link:calculationLink link:definitionLink 9955523 - Disclosure - Investments - Schedule of Aggregate Fair Value and Gross Unrealized Loss of Fixed Maturity Securities in an Unrealized Loss Position (Details) link:presentationLink link:calculationLink link:definitionLink 9955524 - Disclosure - Investments - Narrative (Details) link:presentationLink link:calculationLink link:definitionLink 9955525 - Disclosure - Investments - Schedule of Amortized Cost and Fair Value of Fixed Maturity Securities, By Contractual Maturity (Details) link:presentationLink link:calculationLink link:definitionLink 9955526 - Disclosure - Investments - Schedule of Current Equity Securities (Details) link:presentationLink link:calculationLink link:definitionLink 9955527 - Disclosure - Investments - Schedule of Investment Gains (Losses) (Details) link:presentationLink link:calculationLink link:definitionLink 9955528 - Disclosure - Investments - Schedule of Investment Holdings, Other Than Securities (Details) link:presentationLink link:calculationLink link:definitionLink 9955529 - Disclosure - Derivative Financial Instruments (Details) link:presentationLink link:calculationLink link:definitionLink 9955530 - Disclosure - Fair Value - Schedule of Fair Value Measurements by Level (Details) link:presentationLink link:calculationLink link:definitionLink 9955531 - Disclosure - Fair Value - Narrative (Details) link:presentationLink link:calculationLink link:definitionLink 9955532 - Disclosure - Fair Value - Schedule of Estimated Fair Value by Level (Details) link:presentationLink link:calculationLink link:definitionLink 9955533 - Disclosure - Income Taxes (Details) link:presentationLink link:calculationLink link:definitionLink 9955534 - Disclosure - Medical Claims Payable - Schedule of Reconciliation of Medical Claims Payable (Details) link:presentationLink link:calculationLink link:definitionLink 9955535 - Disclosure - Medical Claims Payable - Narrative (Details) link:presentationLink link:calculationLink link:definitionLink 9955536 - Disclosure - Medical Claims Payable - Schedule of Reconciliation of Net Incurred Medical Claims to Benefit Expense (Details) link:presentationLink link:calculationLink link:definitionLink 9955537 - Disclosure - Medical Claims Payable - Schedule of Reconciliation of the Claims Development to the Claims Liability (Details) link:presentationLink link:calculationLink link:definitionLink 9955538 - Disclosure - Debt (Details) link:presentationLink link:calculationLink link:definitionLink 9955539 - Disclosure - Commitments and Contingencies (Details) link:presentationLink link:calculationLink link:definitionLink 9955540 - Disclosure - Capital Stock - Schedule of Stock Option Activity (Details) link:presentationLink link:calculationLink link:definitionLink 9955541 - Disclosure - Capital Stock - Schedule of Nonvested Restricted Stock Activity Including Restricted Stock Units (Details) link:presentationLink link:calculationLink link:definitionLink 9955542 - Disclosure - Capital Stock - Narrative (Details) link:presentationLink link:calculationLink link:definitionLink 9955543 - Disclosure - Capital Stock - Fair Values of Options Granted During the Period Estimated Using Weighted-Average Assumptions (Details) link:presentationLink link:calculationLink link:definitionLink 9955544 - Disclosure - Capital Stock - Schedule of Weighted-Average Fair Values Determined for the Periods (Details) link:presentationLink link:calculationLink link:definitionLink 9955545 - Disclosure - Capital Stock - Schedule of Cash Dividend Activity (Details) link:presentationLink link:calculationLink link:definitionLink 9955546 - Disclosure - Capital Stock - Schedule of Share Repurchases (Details) link:presentationLink link:calculationLink link:definitionLink 9955547 - Disclosure - Shareholders' Earnings per Share - Denominator for Basic and Diluted Earnings per Share (Details) link:presentationLink link:calculationLink link:definitionLink 9955548 - Disclosure - Shareholders' Earnings per Share - Narrative (Details) link:presentationLink link:calculationLink link:definitionLink 9955549 - Disclosure - Segment Information - Narrative (Details) link:presentationLink link:calculationLink link:definitionLink 9955550 - Disclosure - Segment Information - Schedule of Financial Data by Reportable Segment (Details) link:presentationLink link:calculationLink link:definitionLink 9955551 - Disclosure - Segment Information - Reconciliation of Reportable Segments Operating Revenues to Total Revenues Reported in the Consolidated Statements of Income (Details) link:presentationLink link:calculationLink link:definitionLink 9955552 - Disclosure - Segment Information - Reconciliation of Income Before Income Tax Expense to Reportable Segments Operating Gain Included in the Consolidated Statements of Income (Details) link:presentationLink link:calculationLink link:definitionLink