XML 47 R28.htm IDEA: XBRL DOCUMENT
v3.7.0.1

Investments (Tables) | 6 Months Ended
--- | ---
Jun. 30, 2017
Investments, Debt and Equity Securities [Abstract] |
Investments | The following tables summarize our investments as of the dates indicated:
| June 30, 2017
| Amortized |  | Gross Unrealized |  | Estimated Fair
| Cost |  | Gains |  | Losses |  | Value
| (In millions)
Corporate debt securities | $ | 1,387 |  |  | $ | 1 |  |  | $ | 2 |  |  | $ | 1,386 |
U.S. treasury notes | 263 |  |  | — |  |  | — |  |  | 263 |
GSEs | 242 |  |  | — |  |  | 1 |  |  | 241 |
Municipal securities | 140 |  |  | — |  |  | — |  |  | 140 |
Asset-backed securities | 128 |  |  | — |  |  | — |  |  | 128 |
Certificates of deposit | 34 |  |  | — |  |  | — |  |  | 34 |
Subtotal - current investments | 2,194 |  |  | 1 |  |  | 3 |  |  | 2,192 |
Corporate debt securities | 227 |  |  | 1 |  |  | — |  |  | 228 |
U.S. treasury notes | 97 |  |  | — |  |  | — |  |  | 97 |
Subtotal - current restricted investments | 324 |  |  | 1 |  |  | — |  |  | 325 |
Total | $ | 2,518 |  |  | $ | 2 |  |  | $ | 3 |  |  | $ | 2,517 |
| December 31, 2016
| Amortized |  | Gross Unrealized |  | Estimated Fair
| Cost |  | Gains |  | Losses |  | Value
| (In millions)
Corporate debt securities | $ | 1,180 |  |  | $ | 1 |  |  | $ | 2 |  |  | $ | 1,179 |
U.S. treasury notes | 84 |  |  | — |  |  | — |  |  | 84 |
GSEs | 232 |  |  | — |  |  | 1 |  |  | 231 |
Municipal securities | 143 |  |  | — |  |  | 1 |  |  | 142 |
Asset-backed securities | 69 |  |  | — |  |  | — |  |  | 69 |
Certificates of deposit | 53 |  |  | — |  |  | — |  |  | 53 |
Total - current investments | $ | 1,761 |  |  | $ | 1 |  |  | $ | 4 |  |  | $ | 1,758 |
Contractual maturities of investments | The contractual maturities of our held-to-maturity restricted investments, which are carried at amortized cost, which approximates fair value, as of June 30, 2017 are summarized below:
| Amortized Cost |  | Estimated Fair Value
| (In millions)
Due in one year or less | $ | 100 |  |  | $ | 100 |
Due after one year through five years | 18 |  |  | 17 |
| $ | 118 |  |  | $ | 117 |
The contractual maturities of our available-for-sale investments as of June 30, 2017 are summarized below:
| Amortized Cost |  | Estimated Fair Value
| (In millions)
Due in one year or less | $ | 1,301 |  |  | $ | 1,301 |
Due after one year through five years | 1,194 |  |  | 1,193 |
Due after five years through ten years | 23 |  |  | 23 |
Total | $ | 2,518 |  |  | $ | 2,517 |
Schedule of available for sale securities continuous unrealized loss position | The following table segregates those available-for-sale investments that have been in a continuous loss position for less than 12 months, and those that have been in a loss position for 12 months or more as of June 30, 2017:
| In a Continuous Loss Position for Less than 12 Months |  | In a Continuous Loss Position for 12 Months or More
| Estimated Fair Value |  | Unrealized Losses |  | Total Number of Positions |  | Estimated Fair Value |  | Unrealized Losses |  | Total Number of Positions
| (Dollars in millions)
Corporate debt securities | $ | 913 |  |  | $ | 2 |  |  | 418 |  |  | $ | — |  |  | $ | — |  |  | — |
GSEs | 247 |  |  | 1 |  |  | 101 |  |  | — |  |  | — |  |  | — |
Total - current investments | $ | 1,160 |  |  | $ | 3 |  |  | 519 |  |  | $ | — |  |  | $ | — |  |  | — |
The following table segregates those available-for-sale investments that have been in a continuous loss position for less than 12 months, and those that have been in a loss position for 12 months or more as of December 31, 2016:
| In a Continuous Loss Position for Less than 12 Months |  | In a Continuous Loss Position for 12 Months or More
| Estimated Fair Value |  | Unrealized Losses |  | Total Number of Positions |  | Estimated Fair Value |  | Unrealized Losses |  | Total Number of Positions
| (Dollars in millions)
Corporate debt securities | $ | 542 |  |  | $ | 2 |  |  | 378 |  |  | $ | — |  |  | $ | — |  |  | — |
GSEs | 198 |  |  | 1 |  |  | 73 |  |  | — |  |  | — |  |  | — |
Municipal securities | 101 |  |  | 1 |  |  | 129 |  |  | — |  |  | — |  |  | — |
Total - current investments | $ | 841 |  |  | $ | 4 |  |  | 580 |  |  | $ | — |  |  | $ | — |  |  | — |

X
- Definition Schedule of available for sale securities continuous unrealized loss position. + References No definition available. + Details
Name: | moh_ScheduleOfAvailableForSaleSecuritiesContinuousUnrealizedLossPositionTableTextBlock
Namespace Prefix: | moh_
Data Type: | nonnum:textBlockItemType
Balance Type: | na
Period Type: | duration

X
- Definition Tabular disclosure of maturities of an entity's investments as well as any other information pertinent to the investments. + References No definition available. + Details
Name: | us-gaap_InvestmentsClassifiedByContractualMaturityDateTableTextBlock
Namespace Prefix: | us-gaap_
Data Type: | nonnum:textBlockItemType
Balance Type: | na
Period Type: | duration

X
- References No definition available. + Details
Name: | us-gaap_InvestmentsDebtAndEquitySecuritiesAbstract
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Tabular disclosure of the reconciliation of available-for-sale securities from cost basis to fair value. + References No definition available. + Details
Name: | us-gaap_ScheduleOfAvailableForSaleSecuritiesReconciliationTableTextBlock
Namespace Prefix: | us-gaap_
Data Type: | nonnum:textBlockItemType
Balance Type: | na
Period Type: | duration