CONSOLIDATED CONDENSED STATEMENTS OF EQUITY (Parenthetical) - USD ($) $ in Millions	3 Months Ended
	Jun. 30, 2020	Mar. 31, 2020	Jun. 30, 2019	Mar. 31, 2019
Preferred stock - cash dividends declared per share (in dollars per share)	$ 1,550	$ 1,550	$ 1,550	$ 1,550
Common stock - cash dividends declared per share (in dollars per share)	0.15	$ 0.15	$ 0.14	$ 0.14
First Horizon Share Repurchase Program
Common stock repurchased under share repurchase program			$ 50.2	$ 51.5
Preferred Stock
Preferred stock issuance, net of offering cost (in dollars per share)	$ 100,000,000
Number of shares issued in transaction (in shares)	1,500,000