Principal Accounting Policies - Revenue recognition (Details) - CNY (¥) ¥ in Millions	12 Months Ended
Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Accounting Policies [Abstract]
Agency service fees to third-party advertising agencies	¥ 145.7	¥ 180.9	¥ 180.7
Revenues recognized from noncash transactions	¥ 20.7	¥ 6.8	¥ 8.7

The estimated and recorded amount in agency service fees to third-party advertising agencies. The Group provides cash incentives in the form of agency service fees to certain third-party advertising agencies based on sales performance, and accounts for such incentives as a reduction of revenue in accordance with ASC 605-50-25 Customer Payments and Incentives: Recognition.

No definition available.

Name:	feng_AgencyServiceFeesToThirdPartyAdvertisingAgencies
Namespace Prefix:	feng_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration