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Significant Accounting Policies (Tables) | 12 Months Ended
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Dec. 31, 2019
Accounting Policies [Abstract] |
Cash and cash equivalents | The restricted cash and cash equivalents presented below are included in “Restricted investments” in the accompanying consolidated balance sheets.
| December 31,
| 2019 |  | 2018 |  | 2017
| (In millions)
Cash and cash equivalents | $ | 2,452 |  |  | $ | 2,826 |  |  | $ | 3,186 |
Restricted cash and cash equivalents, non-current | 56 |  |  | 100 |  |  | 95 |
Restricted cash and cash equivalents, current | — |  |  | — |  |  | 9 |
Total cash and cash equivalents, and restricted cash and cash equivalents presented in the consolidated statements of cash flows | $ | 2,508 |  |  | $ | 2,926 |  |  | $ | 3,290 |
Restricted cash and cash equivalents | The restricted cash and cash equivalents presented below are included in “Restricted investments” in the accompanying consolidated balance sheets.
| December 31,
| 2019 |  | 2018 |  | 2017
| (In millions)
Cash and cash equivalents | $ | 2,452 |  |  | $ | 2,826 |  |  | $ | 3,186 |
Restricted cash and cash equivalents, non-current | 56 |  |  | 100 |  |  | 95 |
Restricted cash and cash equivalents, current | — |  |  | — |  |  | 9 |
Total cash and cash equivalents, and restricted cash and cash equivalents presented in the consolidated statements of cash flows | $ | 2,508 |  |  | $ | 2,926 |  |  | $ | 3,290 |
Summarized premium revenue | The following table summarizes premium revenue by health plan for the periods presented:
| Year Ended December 31,
| 2019 |  | 2018 |  | 2017
| Amount |  | % of Total |  | Amount |  | % of Total |  | Amount |  | % of Total
| (Dollars in millions)
California | $ | 2,266 |  |  | 14.0 | % |  | $ | 2,150 |  |  | 12.2 | % |  | $ | 2,701 |  |  | 14.3 | %
Florida | 734 |  |  | 4.5 |  |  | 1,790 |  |  | 10.2 |  |  | 2,568 |  |  | 13.6 |
Illinois | 1,002 |  |  | 6.2 |  |  | 793 |  |  | 4.5 |  |  | 593 |  |  | 3.1 |
Michigan | 1,624 |  |  | 10.0 |  |  | 1,601 |  |  | 9.1 |  |  | 1,596 |  |  | 8.5 |
New Mexico (1) | — |  |  | — |  |  | 1,356 |  |  | 7.7 |  |  | 1,368 |  |  | 7.3 |
Ohio | 2,553 |  |  | 15.8 |  |  | 2,388 |  |  | 13.6 |  |  | 2,216 |  |  | 11.8 |
Puerto Rico | 474 |  |  | 2.9 |  |  | 696 |  |  | 3.9 |  |  | 732 |  |  | 3.9 |
South Carolina | 583 |  |  | 3.6 |  |  | 495 |  |  | 2.8 |  |  | 445 |  |  | 2.4 |
Texas | 2,991 |  |  | 18.5 |  |  | 3,244 |  |  | 18.4 |  |  | 2,813 |  |  | 14.9 |
Washington | 2,695 |  |  | 16.6 |  |  | 2,361 |  |  | 13.4 |  |  | 2,608 |  |  | 13.8 |
Other (1) | 1,286 |  |  | 7.9 |  |  | 738 |  |  | 4.2 |  |  | 1,214 |  |  | 6.4 |
Total | $ | 16,208 |  |  | 100.0 | % |  | $ | 17,612 |  |  | 100.0 | % |  | $ | 18,854 |  |  | 100.0 | %
_______________________ (1) “Other” includes the Idaho, Mississippi, New York, Utah and Wisconsin health plans, which are not individually significant to our consolidated operating results. In 2019, “Other” also includes the New Mexico health plan. The New Mexico health plan’s Medicaid contract terminated on December 31, 2018, and therefore its results are not individually significant to our consolidated operating results in 2019.
Amounts due to government agencies | A summary of the categories of amounts due government agencies is as follows:
| December 31,
| 2019 |  | 2018
| (In millions)
Medicaid program: |  |  |
Medical cost floors and corridors | $ | 74 |  |  | $ | 103 |
Other amounts due to states | 84 |  |  | 81 |
Marketplace program: |  |  |
Risk adjustment | 368 |  |  | 466 |
Cost sharing reduction | — |  |  | 183 |
Other | 138 |  |  | 134 |
Total | $ | 664 |  |  | $ | 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.
| Year Ended December 31,
| 2019 |  | 2018 |  | 2017
| (In millions)
Maximum available quality incentive premium - current period | $ | 186 |  |  | $ | 182 |  |  | $ | 150 |
Amount of quality incentive premium revenue recognized in current period: |  |  |  |  |
Earned current period | $ | 156 |  |  | $ | 133 |  |  | $ | 97 |
Earned prior periods | 38 |  |  | 31 |  |  | 10 |
Total | $ | 194 |  |  | $ | 164 |  |  | $ | 107 |
Quality incentive premium revenue recognized as a percentage of total premium revenue | 1.2 | % |  | 0.9 | % |  | 0.6 | %

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