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Basis of Presentation (Details) member in Millions	9 Months Ended
	Sep. 30, 2016 member State Segment
Basis Of Presentation [Line Items]
Number of reportable segments (in segment) | Segment	3
Health Plans
Basis Of Presentation [Line Items]
Number of states in which entity operates (in state) | State	12
Number of members eligible for the health care programs, approximately (in member) | member	4.2

X

- Definition

Basis Of Presentation [Line Items]

+ References

No definition available.

+ Details

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- Definition

Number of members eligible for the health care programs.

+ References

No definition available.

+ Details

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X

- Definition

Number of segments reported by the entity. A reportable segment is a component of an entity for which there is an accounting requirement to report separate financial information on that component in the entity's financial statements.

+ References

No definition available.

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X

- Definition

The number of states the entity operates in as of the balance sheet date.

+ References

No definition available.

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- Details

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Period Type: