Commitments and Contingencies (Notes)	6 Months Ended
Jun. 30, 2025
Commitments and Contingencies Disclosure [Abstract]
Commitments and Contingencies Disclosure [Text Block]	Commitments and Contingencies Pending Acquisitions As of June 30, 2025, the Company had entered into agreements to acquire companies in the health care sector, subject to regulatory approval and other customary closing conditions. The total anticipated capital required for these acquisitions, excluding the payoff of acquired indebtedness, was approximately $4 billion. Legal Matters The Company is frequently made party to a variety of legal actions and regulatory inquiries, including class actions and suits brought by members, care providers, consumer advocacy organizations, customers, shareholders, and regulators, relating to the Company’s businesses, including management and administration of health benefit plans and other services. These matters include medical malpractice, employment, intellectual property, antitrust, privacy and contract claims and claims related to health care benefits coverage and other business practices. The Company records liabilities for its estimates of probable costs resulting from these matters where appropriate. Estimates of costs resulting from legal and regulatory matters involving the Company are inherently difficult to predict, particularly where the matters: involve indeterminate claims for monetary damages or may involve fines, penalties or punitive damages; present novel legal theories or represent a shift in regulatory policy; involve a large number of claimants or regulatory bodies; are in the early stages of the proceedings; or could result in a change in business practices. Accordingly, the Company is often unable to estimate the losses or ranges of losses for those matters where there is a reasonable possibility or it is probable a loss may be incurred. Government Investigations, Audits and Reviews The Company has been involved or is currently involved in various governmental investigations, audits and reviews. These include routine, regular and special investigations, audits and reviews by the Centers for Medicare and Medicaid Services (CMS), state insurance and health and welfare departments, state attorneys general, the Office of the Inspector General (OIG), the Office of Personnel Management, the Office for Civil Rights, the Government Accountability Office, the Federal Trade Commission, U.S. Congressional committees, the U.S. Department of Justice (DOJ), the SEC, the Internal Revenue Service, the U.S. Drug Enforcement Administration, the U.S. Department of Labor, the Federal Deposit Insurance Corporation, the Consumer Financial Protection Bureau, the Defense Contract Audit Agency, the Food and Drug Administration and other governmental authorities. Similarly, the Company’s international businesses are also subject to investigations, audits and reviews by applicable foreign governments. The Company has also been responding to subpoenas, information requests and investigations from governmental entities. The Company can provide no assurance as to the scope and outcome of these matters and no assurance as to whether its business, financial condition or results of operations will be materially adversely affected. Certain of the Company’s businesses have been reviewed or are currently under review, including for, among other matters, compliance with coding and other requirements under the Medicare risk-adjustment model. CMS and OIG have selected certain of the Company’s local plans for risk adjustment data validation (RADV) audits to validate the coding practices of and supporting documentation maintained by health care providers and such audits may result in retrospective adjustments to payments made to the Company’s health plans. On February 14, 2017, the DOJ announced its decision to pursue certain claims within a lawsuit initially asserted against the Company and filed under seal by a whistleblower in 2011. The whistleblower’s complaint, which was unsealed on February 15, 2017, alleges the Company made improper risk adjustment submissions and violated the False Claims Act. In March 2025, a Special Master appointed by the court issued a report recommending that the court enter summary judgment in the Company’s favor on all remaining claims. In April 2025, the DOJ filed a motion asking the court to reject the Special Master’s report. The Company cannot reasonably estimate the outcome which may result from this matter given its procedural status.

The Company is frequently made party to a variety of legal actions and regulatory inquiries, including class actions and suits brought by members, care providers, consumer advocacy organizations, customers, shareholders, and regulators, relating to the Company’s businesses, including management and administration of health benefit plans and other services. These matters include medical malpractice, employment, intellectual property, antitrust, privacy and contract claims and claims related to health care benefits coverage and other business practices.

The Company records liabilities for its estimates of probable costs resulting from these matters where appropriate. Estimates of costs resulting from legal and regulatory matters involving the Company are inherently difficult to predict, particularly where the matters: involve indeterminate claims for monetary damages or may involve fines, penalties or punitive damages; present novel legal theories or represent a shift in regulatory policy; involve a large number of claimants or regulatory bodies; are in the early stages of the proceedings; or could result in a change in business practices. Accordingly, the Company is often unable to estimate the losses or ranges of losses for those matters where there is a reasonable possibility or it is probable a loss may be incurred.

The Company has been involved or is currently involved in various governmental investigations, audits and reviews. These include routine, regular and special investigations, audits and reviews by the Centers for Medicare and Medicaid Services (CMS), state insurance and health and welfare departments, state attorneys general, the Office of the Inspector General (OIG), the Office of Personnel Management, the Office for Civil Rights, the Government Accountability Office, the Federal Trade Commission, U.S. Congressional committees, the U.S. Department of Justice (DOJ), the SEC, the Internal Revenue Service, the U.S. Drug Enforcement Administration, the U.S. Department of Labor, the Federal Deposit Insurance Corporation, the Consumer Financial Protection Bureau, the Defense Contract Audit Agency, the Food and Drug Administration and other governmental authorities. Similarly, the Company’s international businesses are also subject to investigations, audits and reviews by applicable foreign governments. The Company has also been responding to subpoenas, information requests and investigations from governmental entities. The Company can provide no assurance as to the scope and outcome of these matters and no assurance as to whether its business, financial condition or results of operations will be materially adversely affected. Certain of the Company’s businesses have been reviewed or are currently under review, including for, among other matters, compliance with coding and other requirements under the Medicare risk-adjustment model. CMS and OIG have selected certain of the Company’s local plans for risk adjustment data validation (RADV) audits to validate the coding practices of and supporting documentation maintained by health care providers and such audits may result in retrospective adjustments to payments made to the Company’s health plans.

On February 14, 2017, the DOJ announced its decision to pursue certain claims within a lawsuit initially asserted against the Company and filed under seal by a whistleblower in 2011. The whistleblower’s complaint, which was unsealed on February 15, 2017, alleges the Company made improper risk adjustment submissions and violated the False Claims Act. In March 2025, a Special Master appointed by the court issued a report recommending that the court enter summary judgment in the Company’s favor on all remaining claims. In April 2025, the DOJ filed a motion asking the court to reject the Special Master’s report. The Company cannot reasonably estimate the outcome which may result from this matter given its procedural status.