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Medical Claims and Benefits Payable (Tables) | 3 Months Ended
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Mar. 31, 2017
Other Liabilities Disclosure [Abstract] |
Schedule of liability for unpaid claims and claims adjustment expense | The following table provides the details of our medical claims and benefits payable (including amounts payable for the provision of long-term services and supports, or LTSS) as of the dates indicated.
| March 31, 2017 |  | December 31, 2016
| (In millions)
Fee-for-service claims incurred but not paid (IBNP) | $ | 1,425 |  |  | $ | 1,352 |
Pharmacy payable | 133 |  |  | 112 |
Capitation payable | 36 |  |  | 37 |
Other | 332 |  |  | 428 |
| $ | 1,926 |  |  | $ | 1,929 |
Components of change in medical claims and benefits payable | The following table presents the components of the change in our medical claims and benefits payable for the periods indicated. The amounts presented for “Components of medical care costs related to: Prior periods” represent the amount by which our original estimate of medical claims and benefits payable at the beginning of the period were more than the actual amount of the liability based on information (principally the payment of claims) developed since that liability was first reported.
| Three Months Ended March 31,
| 2017 |  | 2016
| (Dollars in millions)
Medical claims and benefits payable, beginning balance | $ | 1,929 |  |  | $ | 1,685 |
Components of medical care costs related to: |  |  |
Current period | 4,253 |  |  | 3,755 |
Prior periods | (142 | ) |  | (167 | )
Total medical care costs | 4,111 |  |  | 3,588 |
Change in non-risk provider payables | (96 | ) |  | 24 |
Payments for medical care costs related to: |  |  |
Current period | 2,683 |  |  | 2,241 |
Prior periods | 1,335 |  |  | 1,116 |
Total paid | 4,018 |  |  | 3,357 |
Medical claims and benefits payable, ending balance | $ | 1,926 |  |  | $ | 1,940 |
Benefit from prior period as a percentage of: |  |  |
Balance at beginning of period | 7.4 | % |  | 10.0 | %
Premium revenue, trailing twelve months | 0.8 | % |  | 1.2 | %
Medical care costs, trailing twelve months | 0.9 | % |  | 1.3 | %

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- Definition Components Of Change In Medical Claims And Benefits Payable [Table Text Block] + References No definition available. + Details
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- Definition Tabular disclosure of the activity in the reserve for settling insured claims and expenses incurred in the claims settlement process for the period. The estimated liability includes the amount of money that will be required for future payments of (a) claims that have been reported to the insurer, (b) claims related to insured events that have occurred but that have not been reported to the insurer as of the date the liability is estimated, and (c) claim adjustment expenses. Claim adjustment expenses include costs incurred in the claim settlement process such as legal fees; outside adjuster fees; and costs to record, process, and adjust claims. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 944 -SubTopic 40 -Section 50 -Paragraph 3 -URI http://asc.fasb.org/extlink&oid=65670824&loc=d3e14764-158437 + Details
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