Restructuring, Repositioning, And Efficiency (Narrative) (Details) (USD $)	3 Months Ended	6 Months Ended				51 Months Ended
	Mar. 31, 2011	Jun. 30, 2011		Jun. 30, 2010		Jun. 30, 2011
Restructuring, Repositioning, And Efficiency
Full-service First Horizon Bank branches sold		34
Net costs recognized, related to restructuring, repositioning, and efficiency activities		$ 29,700,000		$ 10,700,000
Exit costs		11,200,000		6,300,000
Severance and other employee related costs		10,200,000		2,500,000
Impairments	(10,100,000)	10,100,000	[1],[2]	3,348,000	[1],[2]
Lease abandonment expense				2,300,000
Contract cancellation charge		9,000,000
Other asset impairment charges						$ 40,492,000

[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.