Cover Document - USD ($)	12 Months Ended
	Dec. 31, 2022	Jan. 31, 2023	Jun. 30, 2022
Cover Page [Abstract]
Entity File Number	1-10864
Document Type	10-K
Document Annual Report	true
Document Period End Date	Dec. 31, 2022
Current Fiscal Year End Date	--12-31
Document Fiscal Year Focus	2022
Document Fiscal Period Focus	FY
Amendment Flag	false
Document Transition Report	false
Entity Incorporation, State or Country Code	DE
Entity Tax Identification Number	41-1321939
Entity Address, Address Line One	UnitedHealth Group Center
Entity Address, Address Line Two	9900 Bren Road East
Entity Address, City or Town	Minnetonka,
Entity Address, State or Province	MN
Entity Address, Postal Zip Code	55343
City Area Code	952
Local Phone Number	936-1300
Title of 12(b) Security	Common Stock, $.01 par value
Trading Symbol	UNH
Security Exchange Name	NYSE
Well known seasoned issuer	Yes
Entity Voluntary Filers	No
Current Reporting Status	Yes
Entity Interactive Data Current	Yes
Entity Filer Category	Large Accelerated Filer
Entity Small Business	false
Entity Emerging Growth Company	false
Entity Shell Company	false
Public Float			$ 479,550,880,245
Entity Common Stock, Shares Outstanding		932,846,602
Documents Incorporated by Reference	The information required by Part III of this report, to the extent not set forth herein, is incorporated by reference from the registrant’s definitive proxy statement relating to its 2023 Annual Meeting of Shareholders. Such proxy statement will be filed with the Securities and Exchange Commission within 120 days after the end of the fiscal year to which this report relates.
Entity Registrant Name	UnitedHealth Group Incorporated
Entitiy Central Index Key	0000731766
ICFR Auditor Attestation Flag	true