Intangible Assets (Narrative) (Details) (USD $)	3 Months Ended				9 Months Ended				3 Months Ended
	Dec. 31, 2011	Jun. 30, 2011	Mar. 31, 2011	Mar. 31, 2010	Sep. 30, 2011		Sep. 30, 2010		Sep. 30, 2011 Msaver [Member]
Gross carrying amount of other intangible assets					$ 105,300,000
Intangible assets accumulated amortization excluding goodwill					78,000,000
Estimated aggregate amortization expense, remainder of the fiscal year	1,000,000
Estimated aggregate amortization expense, Year 2012					3,800,000
Estimated aggregate amortization expense, Year 2013					3,600,000
Estimated aggregate amortization expense, Year 2014					3,500,000
Estimated aggregate amortization expense, Year 2015					3,300,000
Estimated aggregate amortization expense, Year 2016					3,100,000
Goodwill, Divestitures		16,400,000			(18,421,000)				2,000,000
Goodwill, Impairment			10,100,000	3,300,000	10,100,000	[1],[2]	3,348,000	[1],[2]
Recognition of intangible asset impairment losses effect on FHN's debt covenants					$ 0

[1] See Note 17 - Restructuring, Repositioning, and Efficiency for further details related to goodwill impairments.

[2] See Note 2 - Acquisitions and Divestitures for further details regarding goodwill related to divestitures.