Basis of Presentation (Notes)	3 Months Ended
Mar. 31, 2020
Basis of Presentation and Significant Accounting Policies [Text Block]	Basis of Presentation UnitedHealth Group Incorporated (individually and together with its subsidiaries, “UnitedHealth Group” and “the Company”) is a diversified health care company dedicated to helping people live healthier lives and helping make the health system work better for everyone. Through its diversified family of businesses, the Company leverages core competencies in data and health information; advanced technology; and clinical expertise. These core competencies are deployed within two distinct, but strategically aligned, business platforms: health benefits operating under UnitedHealthcare and health services operating under Optum. The Company has prepared the Condensed Consolidated Financial Statements according to U.S. Generally Accepted Accounting Principles (GAAP) and has included the accounts of UnitedHealth Group and its subsidiaries. The year-end condensed consolidated balance sheet was derived from audited financial statements, but does not include all disclosures required by GAAP. In accordance with the rules and regulations of the U.S. Securities and Exchange Commission (SEC), the Company has omitted certain footnote disclosures that would substantially duplicate the disclosures contained in its annual audited Consolidated Financial Statements. Therefore, these Condensed Consolidated Financial Statements should be read together with the Consolidated Financial Statements and the Notes included in Part II, Item 8, “Financial Statements and Supplementary Data” in the Company’s Annual Report on Form 10-K for the year ended December 31, 2019 as filed with the SEC (2019 10-K). The accompanying Condensed Consolidated Financial Statements include all normal recurring adjustments necessary to present the interim financial statements fairly. Use of Estimates These Condensed Consolidated Financial Statements include certain amounts based on the Company’s best estimates and judgments. The Company’s most significant estimates include medical costs payable and goodwill. Certain of these estimates require the application of complex assumptions and judgments, often because they involve matters that are inherently uncertain and will likely change in subsequent periods. The impact of any change in estimates is included in earnings in the period in which the estimate is adjusted. Revenue from Products For the quarter ended March 31, 2020, the Company recognized revenue and cost of products sold for retail pharmacy co-payments related to its OptumRx business. Revenue recognized in prior periods related to retail pharmacy transactions excludes the member’s applicable co-payment. There was no impact on earnings from operations, net earnings, earnings per share or total equity. Recently Adopted Accounting Standards In June 2016, the Financial Accounting Standards Board (FASB) issued Accounting Standard Update (ASU) No. 2016-13, “Financial Instruments - Credit Losses (Topic 326)” (ASU 2016-13). ASU 2016-13 requires the use of the current expected credit loss impairment model to develop an estimate of expected credit losses for certain financial assets. ASU 2016-13 also requires expected credit losses on available-for-sale debt securities to be recognized through an allowance for credit losses and revises certain disclosure requirements. The Company adopted ASU 2016-13 on January 1, 2020 using a cumulative effect upon adoption approach. The adoption of ASU 2016-13 was immaterial to the Company’s consolidated balance sheet, results of operations, equity and cash flows. Under the current expected credit loss impairment model, the Company evaluates an available-for-sale debt security for credit-related impairment by considering the present value of expected cash flows relative to a security’s amortized cost, the extent to which fair value is less than amortized cost, the financial condition and near-term prospects of the issuer and specific events or circumstances that may influence the operations of the issuer. Credit-related impairments are recorded as an allowance, with an offset to investment and other income. Non-credit related impairments are recorded through other comprehensive income. If the Company intends to sell an impaired security, or will likely be required to sell a security before recovery of the entire amortized cost, the entire impairment is included in net earnings. The Company has determined that there have been no other recently adopted or issued accounting standards that had, or will have, a material impact on its Condensed Consolidated Financial Statements.

Basis of Presentation (Notes)

3 Months Ended

Mar. 31, 2020

Basis of Presentation and Significant Accounting Policies [Text Block]

Basis of Presentation

UnitedHealth Group Incorporated (individually and together with its subsidiaries, “UnitedHealth Group” and “the Company”) is a diversified health care company dedicated to helping people live healthier lives and helping make the health system work better for everyone.

Through its diversified family of businesses, the Company leverages core competencies in data and health information; advanced technology; and clinical expertise. These core competencies are deployed within two distinct, but strategically aligned, business platforms: health benefits operating under UnitedHealthcare and health services operating under Optum.

The Company has prepared the Condensed Consolidated Financial Statements according to U.S. Generally Accepted Accounting Principles (GAAP) and has included the accounts of UnitedHealth Group and its subsidiaries. The year-end condensed consolidated balance sheet was derived from audited financial statements, but does not include all disclosures required by GAAP. In accordance with the rules and regulations of the U.S. Securities and Exchange Commission (SEC), the Company has omitted certain footnote disclosures that would substantially duplicate the disclosures contained in its annual audited Consolidated Financial Statements. Therefore, these Condensed Consolidated Financial Statements should be read together with the Consolidated Financial Statements and the Notes included in Part II, Item 8, “Financial Statements and Supplementary Data” in the Company’s Annual Report on Form 10-K for the year ended December 31, 2019 as filed with the SEC (2019 10-K). The accompanying Condensed Consolidated Financial Statements include all normal recurring adjustments necessary to present the interim financial statements fairly.

Use of Estimates

These Condensed Consolidated Financial Statements include certain amounts based on the Company’s best estimates and judgments. The Company’s most significant estimates include medical costs payable and goodwill. Certain of these estimates require the application of complex assumptions and judgments, often because they involve matters that are inherently uncertain and will likely change in subsequent periods. The impact of any change in estimates is included in earnings in the period in which the estimate is adjusted.

Revenue from Products

For the quarter ended March 31, 2020, the Company recognized revenue and cost of products sold for retail pharmacy co-payments related to its OptumRx business. Revenue recognized in prior periods related to retail pharmacy transactions excludes the member’s applicable co-payment. There was no impact on earnings from operations, net earnings, earnings per share or total equity.

Recently Adopted Accounting Standards

In June 2016, the Financial Accounting Standards Board (FASB) issued Accounting Standard Update (ASU) No. 2016-13, “Financial Instruments - Credit Losses (Topic 326)” (ASU 2016-13). ASU 2016-13 requires the use of the current expected credit loss impairment model to develop an estimate of expected credit losses for certain financial assets. ASU 2016-13 also requires expected credit losses on available-for-sale debt securities to be recognized through an allowance for credit losses and revises certain disclosure requirements. The Company adopted ASU 2016-13 on January 1, 2020 using a cumulative effect upon adoption approach. The adoption of ASU 2016-13 was immaterial to the Company’s consolidated balance sheet, results of operations, equity and cash flows.

Under the current expected credit loss impairment model, the Company evaluates an available-for-sale debt security for credit-related impairment by considering the present value of expected cash flows relative to a security’s amortized cost, the extent to which fair value is less than amortized cost, the financial condition and near-term prospects of the issuer and specific events or circumstances that may influence the operations of the issuer. Credit-related impairments are recorded as an allowance, with an offset to investment and other income. Non-credit related impairments are recorded through other comprehensive income. If the Company intends to sell an impaired security, or will likely be required to sell a security before recovery of the entire amortized cost, the entire impairment is included in net earnings.

The Company has determined that there have been no other recently adopted or issued accounting standards that had, or will have, a material impact on its Condensed Consolidated Financial Statements.