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Significant Accounting Policies (Tables) | 9 Months Ended
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Sep. 30, 2019
Accounting Policies [Abstract] |
Schedule of Cash and Cash Equivalents | The following table provides a reconciliation of cash, cash equivalents, and restricted cash and cash equivalents reported within the accompanying consolidated balance sheets that sum to the total of the same such amounts presented in the accompanying consolidated statements of cash flows. The restricted cash and cash equivalents presented below are included in non-current “Restricted investments” in the accompanying consolidated balance sheets.
| September 30,
| 2019 |  | 2018
| (In millions)
Cash and cash equivalents | $ | 2,679 |  |  | $ | 2,814 |
Restricted cash and cash equivalents | 55 |  |  | 94 |
Total cash, cash equivalents, and restricted cash and cash equivalents presented in the statements of cash flows | $ | 2,734 |  |  | $ | 2,908 |
Restricted Cash and Cash Equivalents | The following table provides a reconciliation of cash, cash equivalents, and restricted cash and cash equivalents reported within the accompanying consolidated balance sheets that sum to the total of the same such amounts presented in the accompanying consolidated statements of cash flows. The restricted cash and cash equivalents presented below are included in non-current “Restricted investments” in the accompanying consolidated balance sheets.
| September 30,
| 2019 |  | 2018
| (In millions)
Cash and cash equivalents | $ | 2,679 |  |  | $ | 2,814 |
Restricted cash and cash equivalents | 55 |  |  | 94 |
Total cash, cash equivalents, and restricted cash and cash equivalents presented in the statements of cash flows | $ | 2,734 |  |  | $ | 2,908 |
Amounts Due to Government Agencies | A summary of the categories of amounts due government agencies follows:
| September 30, 2019 |  | December 31, 2018
| (In millions)
Medicaid program: |  |  |
Medical cost floors and corridors | $ | 95 |  |  | $ | 103 |
Other amounts due to states | 69 |  |  | 81 |
Marketplace program: |  |  |
Risk adjustment | 285 |  |  | 466 |
Cost sharing reduction (“CSR”) | — |  |  | 183 |
Other | 163 |  |  | 134 |
Total amounts due government agencies | $ | 612 |  |  | $ | 967 |
Quality Incentive Premium Revenue Recognized | The following table quantifies the quality incentive premium revenue recognized for the periods presented, including the amounts earned in the periods presented and prior periods.
| Three Months Ended September 30, |  | Nine Months Ended September 30,
| 2019 |  | 2018 |  | 2019 |  | 2018
| (In millions)
Maximum available quality incentive premium - current period | $ | 47 |  |  | $ | 48 |  |  | $ | 138 |  |  | $ | 135 |
Quality incentive premium revenue recognized in current period: |  |  |  |  |  |  |
Earned current period | $ | 46 |  |  | $ | 39 |  |  | $ | 109 |  |  | $ | 97 |
Earned prior periods | 5 |  |  | 9 |  |  | 35 |  |  | 32 |
Total | $ | 51 |  |  | $ | 48 |  |  | $ | 144 |  |  | 129 |
Quality incentive premium revenue recognized as a percentage of total premium revenue | 1.2 | % |  | 1.1 | % |  | 1.2 | % |  | 1.0 | %

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