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Medical Costs Payable, Incurred and Paid Medical Cost Development (Details) - Health Insurance Product Line [Member] - USD ($) $ in Millions	Dec. 31, 2020	Dec. 31, 2019
Net Incurred Medical Costs	$ 316,493
Net Cumulative Medical Payments	(295,124)
Net remaining outstanding liabilities prior to 2019	503
Total Medical costs payable	21,872
Short-duration Insurance Contracts, Accident Year 2019 [Member]
Net Incurred Medical Costs	156,217	$ 157,020
Net Cumulative Medical Payments	(155,150)	$ (137,155)
Short-duration Insurance Contracts, Accident Year 2020 [Member]
Net Incurred Medical Costs	160,276
Net Cumulative Medical Payments	$ (139,974)

X

- Definition

Amount, after reinsurance, of paid claims and allocated claim adjustment expense used in claims development for short-duration insurance contracts. Excludes unallocated claim adjustment expense.

+ References

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-Publisher FASB
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-Topic 944
-SubTopic 40
-Section 50
-Paragraph 4B
-Subparagraph (b)
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- Definition

Undiscounted amount, after reinsurance, of incurred claims and allocated claim adjustment expense used in claims development for short-duration insurance contracts. Excludes unallocated claim adjustment expense.

+ References

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- Definition

Undiscounted amount, after reinsurance, of the liability for unpaid claims and allocated claim adjustment expense for short-duration insurance contracts. Excludes unallocated claim adjustment expense.

+ References

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-Publisher FASB
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-SubTopic 40
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-Paragraph 4C
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- Definition

Undiscounted amount, after reinsurance, of the liability for unpaid claims and allocated claim adjustment expense for short-duration insurance contracts for accident years not separately presented in claim development information. Excludes unallocated claim adjustment expense.

+ References

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