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Share-based Compensation (Effects of changes to forfeiture rate) (Details) - 12 months ended Dec. 31, 2016 ¥ in Millions, $ in Millions	CNY (¥)	USD ($)
Change in forfeiture rate [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based compensation reduced	¥ 27.6	$ 4.1

X

- Definition

Decrease in share-based compensation expense due to the effects of changes to the forfeiture rate this period.

+ References

No definition available.

+ Details

Name:	feng_DecreaseInShareBasedCompensationExpenseDueToEffectsOfChangesToForfeitureRateCurrentPeriod
Namespace Prefix:	feng_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

X

- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

+ References

No definition available.

+ Details

Name:	us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems
Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

X

- Details

Name:	us-gaap_ChangeInAccountingEstimateByTypeAxis=feng_ChangeInForfeitureRateForShareBasedCompensationMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type: