Loan Sales And Securitizations (Narrative) (Details)	3 Months Ended
Sep. 30, 2013	Sep. 30, 2012
Loan Sales And Securitizations [Abstract]
Percentage of single-family mortgage loans received as fees	0.29%	0.29%
Percentage of outstanding balance generating for annual servicing inclusive excess interests	0.34%	0.34%
Percentage of HELOC and home equity loans received as fees	0.50%	0.50%
Percentage variation in assumptions that can not necessarily be extrapolated	10.00%

Percentage of outstanding balances of HELOC and home equity loans transferred that, per contract, are due to the servicer in exchange for servicing the financial asset and would no longer be received by a servicer if the beneficial owners of the serviced assets (or their trustees or agents) were to exercise their actual or potential authority under the contract to shift the servicing to another servicer.

No definition available.

Name:	fhn_PercentageOfOutstandingBalanceGeneratingForAnnualServicingOfHELOCAndHomeEquityLoans
Namespace Prefix:	fhn_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration