Basis of Presentation (Details) - USD ($) $ in Millions |
6 Months Ended | |
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Jun. 30, 2025 |
Dec. 31, 2024 |
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| 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.
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| Accounts Receivable, after Allowance for Credit Loss, Current | $ 24,142 | $ 22,365 |
| Revenue, Remaining Performance Obligation, Amount | $ 11,900 | |
| Revenue, Remaining Performance Obligation, Percentage | 50.00% | |
| Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2025-07-01 | ||
| Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Period | 3 years | |
| unh:ProductsandservicesMember | ||
| Accounts Receivable, after Allowance for Credit Loss, Current | $ 9,800 | $ 9,900 |