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Goodwill and Intangible Assets Changes in the Carrying Amount of Goodwill by Reporting Segment (Details) - USD ($) $ in Millions | 12 Months Ended
--- | ---
Dec. 31, 2022 | Dec. 31, 2021
Goodwill [Line Items] |  |
Goodwill, Beginning Balance | $ 75,795 | $ 71,337
Acquisitions | 17,710 | 4,804
Foreign currency effects and adjustments, net | (153) | (346)
Goodwill, Ending Balance | 93,352 | 75,795
UnitedHealthcare |  |
Goodwill [Line Items] |  |
Goodwill, Beginning Balance | 27,389 | 27,785
Acquisitions | 19 | 60
Foreign currency effects and adjustments, net | (13) | (456)
Goodwill, Ending Balance | 27,395 | 27,389
Optum Health |  |
Goodwill [Line Items] |  |
Goodwill, Beginning Balance | 24,224 | 19,844
Acquisitions | 5,158 | 4,648
Foreign currency effects and adjustments, net | (144) | (268)
Goodwill, Ending Balance | 29,238 | 24,224
Optum Insight |  |
Goodwill [Line Items] |  |
Goodwill, Beginning Balance | 8,619 | 8,173
Acquisitions | 8,623 | 96
Foreign currency effects and adjustments, net | 2 | 350
Goodwill, Ending Balance | 17,244 | 8,619
Optum Rx |  |
Goodwill [Line Items] |  |
Goodwill, Beginning Balance | 15,563 | 15,535
Acquisitions | 3,910 | 0
Foreign currency effects and adjustments, net | 2 | 28
Goodwill, Ending Balance | $ 19,475 | $ 15,563

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