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Basis of Presentation (Details) - USD ($) $ in Millions | 9 Months Ended |
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Sep. 30, 2025 | Dec. 31, 2024
Nature of Operations | UnitedHealth Group Incorporated (individually and together with its subsidiaries, “UnitedHealth Group” and the “Company”) is a health care and well-being company with a mission to help people live healthier lives and help make the health system work better for everyone. The Company’s two distinct, yet complementary businesses — Optum and UnitedHealthcare — are working to help build a modern, high-performing health system through improved access, affordability, outcomes and experiences for the individuals and organizations the Company is privileged to serve. |
Accounts Receivable, after Allowance for Credit Loss, Current | $ 22,672 | $ 22,365
Revenue, Remaining Performance Obligation, Amount | $ 11,600 |
Revenue, Remaining Performance Obligation, Percentage | 50.00% |
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2025-10-01 |  |
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Period | 3 years |
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Accounts Receivable, after Allowance for Credit Loss, Current | $ 10,100 | $ 9,900

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