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Significant Accounting Policies - Amounts Due To Government Agencies (Details) - USD ($) $ in Millions | Jun. 30, 2021 | Dec. 31, 2020
--- | --- | ---
Medicaid: |  |
Minimum MLR and profit sharing | $ 774 | $ 513
Other | 208 | 76
Medicare: |  |
Risk adjustment and Part D risk sharing | 88 | 45
Minimum MLR and profit sharing | 136 | 62
Other | 33 | 30
Marketplace: |  |
Risk adjustment | 719 | 326
Minimum MLR | 52 | 37
Other | 62 | 21
Magellan Complete Care acquisition opening balance | 0 | 143
Medical Premium Liability Due To Agency | $ 2,072 | $ 1,253

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