0000001 - Document - Cover Page link:presentationLink link:calculationLink link:definitionLink 9952151 - Statement - Consolidated Statements of Income link:presentationLink link:calculationLink link:definitionLink 9952152 - Statement - Consolidated Statements of Comprehensive Income link:presentationLink link:calculationLink link:definitionLink 9952153 - Statement - Consolidated Balance Sheets link:presentationLink link:calculationLink link:definitionLink 9952154 - Statement - Consolidated Balance Sheets (Parenthetical) link:presentationLink link:calculationLink link:definitionLink 9952155 - Statement - Consolidated Statements of Changes in Total Equity link:presentationLink link:calculationLink link:definitionLink 9952156 - Statement - Consolidated Statements of Changes in Total Equity (Parenthetical) link:presentationLink link:calculationLink link:definitionLink 9952157 - Statement - Consolidated Statements of Cash Flows link:presentationLink link:calculationLink link:definitionLink 9952158 - Disclosure - Description of Business link:presentationLink link:calculationLink link:definitionLink 9952159 - Disclosure - Summary of Significant Accounting Policies link:presentationLink link:calculationLink link:definitionLink 9952160 - Disclosure - Accounts Receivable, Net link:presentationLink link:calculationLink link:definitionLink 9952161 - Disclosure - Supplier Finance Program link:presentationLink link:calculationLink link:definitionLink 9952162 - Disclosure - Earnings Per Share link:presentationLink link:calculationLink link:definitionLink 9952163 - Disclosure - Debt link:presentationLink link:calculationLink link:definitionLink 9952164 - Disclosure - Insurance and Contractholder Liabilities link:presentationLink link:calculationLink link:definitionLink 9952165 - Disclosure - Reinsurance link:presentationLink link:calculationLink link:definitionLink 9952166 - Disclosure - Investments link:presentationLink link:calculationLink link:definitionLink 9952167 - Disclosure - Fair Value Measurements link:presentationLink link:calculationLink link:definitionLink 9952168 - Disclosure - Accumulated Other Comprehensive Income (Loss) link:presentationLink link:calculationLink link:definitionLink 9952169 - Disclosure - Strategic Optimization Program link:presentationLink link:calculationLink link:definitionLink 9952170 - Disclosure - Income Taxes link:presentationLink link:calculationLink link:definitionLink 9952171 - Disclosure - Contingencies and Other Matters link:presentationLink link:calculationLink link:definitionLink 9952172 - Disclosure - Segment Information link:presentationLink link:calculationLink link:definitionLink 9955511 - Disclosure - Summary of Significant Accounting Policies (Policies) link:presentationLink link:calculationLink link:definitionLink 9955512 - Disclosure - Accounts Receivable, Net (Policies) link:presentationLink link:calculationLink link:definitionLink 9955513 - Disclosure - Earnings Per Share (Policies) link:presentationLink link:calculationLink link:definitionLink 9955514 - Disclosure - Insurance and Contractholder Liabilities (Policies) link:presentationLink link:calculationLink link:definitionLink 9955515 - Disclosure - Reinsurance (Policies) link:presentationLink link:calculationLink link:definitionLink 9955516 - Disclosure - Investments (Policies) link:presentationLink link:calculationLink link:definitionLink 9955517 - Disclosure - Fair Value Measures and Disclosures (Policies) link:presentationLink link:calculationLink link:definitionLink 9955518 - Disclosure - Accumulated Other Comprehensive Income (Loss) (Policies) link:presentationLink link:calculationLink link:definitionLink 9955519 - Disclosure - Income Taxes (Policies) link:presentationLink link:calculationLink link:definitionLink 9955520 - Disclosure - Commitment and Contingencies (Policies) link:presentationLink link:calculationLink link:definitionLink 9955521 - Disclosure - Segment Reporting (Policies) link:presentationLink link:calculationLink link:definitionLink 9955522 - Disclosure - Accounts Receivable, Net (Tables) link:presentationLink link:calculationLink link:definitionLink 9955523 - Disclosure - Supplier Finance Program (Tables) link:presentationLink link:calculationLink link:definitionLink 9955524 - Disclosure - Earnings Per Share (Tables) link:presentationLink link:calculationLink link:definitionLink 9955525 - Disclosure - Insurance and Contractholder Liabilities (Tables) link:presentationLink link:calculationLink link:definitionLink 9955526 - Disclosure - Reinsurance (Tables) link:presentationLink link:calculationLink link:definitionLink 9955527 - Disclosure - Investments (Tables) link:presentationLink link:calculationLink link:definitionLink 9955528 - Disclosure - Fair Value Measurements (Tables) link:presentationLink link:calculationLink link:definitionLink 9955529 - Disclosure - Accumulated Other Comprehensive Income (Loss) (Tables) link:presentationLink link:calculationLink link:definitionLink 9955530 - Disclosure - Strategic Optimization Program (Tables) link:presentationLink link:calculationLink link:definitionLink 9955531 - Disclosure - Segment Information (Tables) link:presentationLink link:calculationLink link:definitionLink 9955532 - Disclosure - Description of Business - Segment Information (Details) link:presentationLink link:calculationLink link:definitionLink 9955533 - Disclosure - Accounts Receivable, Net - Amounts (Details) link:presentationLink link:calculationLink link:definitionLink 9955534 - Disclosure - Accounts Receivable, Net - Allowances (Details) link:presentationLink link:calculationLink link:definitionLink 9955535 - Disclosure - Accounts Receivable, Net - Factoring Facility (Details) link:presentationLink link:calculationLink link:definitionLink 9955536 - Disclosure - Supplier Finance Program (Details) link:presentationLink link:calculationLink link:definitionLink 9955537 - Disclosure - Earnings Per Share - Basic and Diluted Earnings Per Share (Details) link:presentationLink link:calculationLink link:definitionLink 9955538 - Disclosure - Earnings Per Share - Anti-dilutive Options (Details) link:presentationLink link:calculationLink link:definitionLink 9955539 - Disclosure - Earnings Per Share - Dividends (Details) link:presentationLink link:calculationLink link:definitionLink 9955540 - Disclosure - Earnings Per Share - Shares of Common Stock Held in Treasury (Details) link:presentationLink link:calculationLink link:definitionLink 9955541 - Disclosure - Debt - Debt Repayment (Details) link:presentationLink link:calculationLink link:definitionLink 9955542 - Disclosure - Debt - Revolving Credit Agreement and Commercial Paper (Details) link:presentationLink link:calculationLink link:definitionLink 9955543 - Disclosure - Debt - Interest Expense (Details) link:presentationLink link:calculationLink link:definitionLink 9955544 - Disclosure - Insurance and Contractholder Liabilities - Account Balances (Details) link:presentationLink link:calculationLink link:definitionLink 9955544 - Disclosure - Insurance and Contractholder Liabilities - Account Balances (Details) link:presentationLink link:calculationLink link:definitionLink 9955545 - Disclosure - Insurance and Contractholder Liabilities - Unpaid Claims and Claim Expenses - Cigna Healthcare - Activity (Details) link:presentationLink link:calculationLink link:definitionLink 9955546 - Disclosure - Insurance and Contractholder Liabilities - Unpaid Claims and Claims Expenses - Cigna Healthcare - Variances in Incurred Costs Related to Prior Years' Unpaid Claims and Claims Expenses (Details) link:presentationLink link:calculationLink link:definitionLink 9955547 - Disclosure - Insurance and Contractholder Liabilities - Future Policy Benefits (Details) link:presentationLink link:calculationLink link:definitionLink 9955548 - Disclosure - Insurance and Contractholder Liabilities - Contractholder Deposit Funds (Details) link:presentationLink link:calculationLink link:definitionLink 9955549 - Disclosure - Insurance and Contractholder Liabilities - Market Risk Benefits (Details) link:presentationLink link:calculationLink link:definitionLink 9955550 - Disclosure - Insurance and Contractholder Liabilities - Net Amount of Risk and Average Age of Contractholders (Details) link:presentationLink link:calculationLink link:definitionLink 9955551 - Disclosure - Reinsurance - Reinsurance Recoverables (Details) link:presentationLink link:calculationLink link:definitionLink 9955551 - Disclosure - Reinsurance - Reinsurance Recoverables (Details) link:presentationLink link:calculationLink link:definitionLink 9955552 - Disclosure - Reinsurance - Variable Annuity Reinsurance Agreement (Details) link:presentationLink link:calculationLink link:definitionLink 9955553 - Disclosure - Investments - Investments by Category (Details) link:presentationLink link:calculationLink link:definitionLink 9955554 - Disclosure - Investments - Investments by Category, Including Disposal Groups (Details) link:presentationLink link:calculationLink link:definitionLink 9955554 - Disclosure - Investments - Investments by Category, Including Disposal Groups (Details) link:presentationLink link:calculationLink link:definitionLink 9955555 - Disclosure - Investments - Debt Securities by Contractual Maturity Periods (Details) link:presentationLink link:calculationLink link:definitionLink 9955556 - Disclosure - Investments - Gross Unrealized Appreciation (Depreciation) on Debt Securities by Type of Issuer (Details) link:presentationLink link:calculationLink link:definitionLink 9955557 - Disclosure - Investments - Summary of Debt Securities with a Decline in Fair Value (Details) link:presentationLink link:calculationLink link:definitionLink 9955557 - Disclosure - Investments - Summary of Debt Securities with a Decline in Fair Value (Details) link:presentationLink link:calculationLink link:definitionLink 9955558 - Disclosure - Investments - Equity Securities (Details) link:presentationLink link:calculationLink link:definitionLink 9955559 - Disclosure - Investments - Commercial Mortgage Loans (Details) link:presentationLink link:calculationLink link:definitionLink 9955560 - Disclosure - Investments - Other Long-Term Investments (Details) link:presentationLink link:calculationLink link:definitionLink 9955561 - Disclosure - Investments - Derivative Financial Instruments (Details) link:presentationLink link:calculationLink link:definitionLink 9955562 - Disclosure - Investments - Components of Net Investment Income/Losses (Details) link:presentationLink link:calculationLink link:definitionLink 9955563 - Disclosure - Investments - Investment Gains and Losses (Details) link:presentationLink link:calculationLink link:definitionLink 9955564 - Disclosure - Fair Value Measurements - Financial Assets and Liabilities Carried at Fair Value (Details) link:presentationLink link:calculationLink link:definitionLink 9955565 - Disclosure - Fair Value Measurements - Quantitative Information About Unobservable Inputs (Details) link:presentationLink link:calculationLink link:definitionLink 9955566 - Disclosure - Fair Value Measurements - Information about Derivative Instruments (Details) link:presentationLink link:calculationLink link:definitionLink 9955567 - Disclosure - Fair Value Measurements - Changes in Level 3 Financial Assets and Financial Liabilities Carried at Fair Value (Details) link:presentationLink link:calculationLink link:definitionLink 9955568 - Disclosure - Fair Value Measurements - Separate Accounts (Details) link:presentationLink link:calculationLink link:definitionLink 9955569 - Disclosure - Fair Value Measurements - Assets and Liabilities Measured at Fair Value under Certain Conditions (Details) link:presentationLink link:calculationLink link:definitionLink 9955570 - Disclosure - Fair Value Measurements - Fair Value Disclosures for Financial Instruments Not Carried at Fair Value (Details) link:presentationLink link:calculationLink link:definitionLink 9955571 - Disclosure - Accumulated Other Comprehensive Income (Loss) (Details) link:presentationLink link:calculationLink link:definitionLink 9955572 - Disclosure - Strategic Optimization Program (Details) link:presentationLink link:calculationLink link:definitionLink 9955573 - Disclosure - Income Taxes - Narrative (Details) link:presentationLink link:calculationLink link:definitionLink 9955574 - Disclosure - Contingencies and Other Matters (Details) link:presentationLink link:calculationLink link:definitionLink 9955575 - Disclosure - Segment Information - Special Item Charges (Benefits) (Details) link:presentationLink link:calculationLink link:definitionLink 9955576 - Disclosure - Segment Information - Summarized Segment Financial Information (Details) link:presentationLink link:calculationLink link:definitionLink 9955576 - Disclosure - Segment Information - Summarized Segment Financial Information (Details) link:presentationLink link:calculationLink link:definitionLink 9955577 - Disclosure - Segment Information - Revenue from External Customers (Details) link:presentationLink link:calculationLink link:definitionLink 9955578 - Disclosure - Segment Information - Financial and Performance Guarantees (Details) link:presentationLink link:calculationLink link:definitionLink