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Segment Financial Information (Notes)
 3 Months Ended
Mar. 31, 2024
Segment Reporting [Abstract]  
Segment Reporting Disclosure Segment Financial Information
The Company’s four reportable segments are UnitedHealthcare, Optum Health, Optum Insight and Optum Rx. For more information on the Company’s segments, see Part I, Item I, “Business” and Note 14 of Notes to the Consolidated Financial Statements included in Part II, Item 8, “Financial Statements and Supplementary Data” in the 2023 10-K.
The following tables present reportable segment financial information:
  Optum  
(in millions)UnitedHealthcareOptum HealthOptum InsightOptum RxOptum EliminationsOptumCorporate and
Eliminations		Consolidated
Three Months Ended March 31, 2024
Revenues - unaffiliated customers:
Premiums$72,293 $5,695 $— $— $— $5,695 $— $77,988 
Products— 59 41 11,809 — 11,909 — 11,909 
Services2,529 3,970 1,702 687 — 6,359 — 8,888 
Total revenues - unaffiliated customers
74,822 9,724 1,743 12,496 — 23,963 — 98,785 
Total revenues - affiliated customers
— 16,617 2,731 18,281 (1,016)36,613 (36,613)— 
Investment and other income
535 390 28 58 — 476 — 1,011 
Total revenues$75,357 $26,731 $4,502 $30,835 $(1,016)$61,052 $(36,613)$99,796 
Earnings from operations$4,395 $1,899 $490 $1,147 $— $3,536 $— $7,931 
Interest expense— — — — — — (844)(844)
Loss on sale of subsidiary(7,086)— — — — — — (7,086)
Earnings before income taxes
$(2,691)$1,899 $490 $1,147 $— $3,536 $(844)$1 
Three Months Ended March 31, 2023
Revenues - unaffiliated customers:
Premiums$67,458 $5,328 $— $— $— $5,328 $— $72,786 
Products— 44 40 10,183 — 10,267 — 10,267 
Services2,555 3,089 1,926 510 — 5,525 — 8,080 
Total revenues - unaffiliated customers
70,013 8,461 1,966 10,693 — 21,120 — 91,133 
Total revenues - affiliated customers
— 14,266 2,510 16,679 (859)32,596 (32,596)— 
Investment and other income
455 277 20 46 — 343 — 798 
Total revenues$70,468 $23,004 $4,496 $27,418 $(859)$54,059 $(32,596)$91,931 
Earnings from operations$4,343 $1,776 $907 $1,060 $— $3,743 $— $8,086 
Interest expense— — — — — — (754)(754)
Earnings before income taxes
$4,343 $1,776 $907 $1,060 $— $3,743 $(754)$7,332