Legal Proceedings (Details) - Litigation Related to Military Family Life Consultants [Member] - actions	Jun. 30, 2015	Jun. 14, 2011
Commitments and Contingencies [Line Items]
Number of pending litigations	3
Number of former MFLCs filing putative class action	2	2
Number of other named plaintiffs	12

Number of former MFLCs filing putative class action

No definition available.

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Namespace Prefix:	hnt_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	instant