CONSOLIDATED STATEMENTS OF CHANGES IN EQUITY - USD ($) shares in Thousands, $ in Millions	Total	Preferred Stock	Common Stock	Capital Surplus	Retained Earnings	Accumulated Other Comprehensive Income (Loss)		Noncontrolling Interest	Preferred Stock
Balance, beginning of period (in shares) at Dec. 31, 2021			533,577						26,750
Balance, beginning of period at Dec. 31, 2021	$ 8,494		$ 333	$ 4,743	$ 2,891	$ (288)	[1]	$ 295	$ 520
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	198				195			3
Other comprehensive income (loss)	(424)					(424)	[1]
Cash dividends declared:
Preferred stock	(8)				(8)
Common stock	(82)				(82)
Preferred stock issuance (in shares)		4,936
Preferred stock issuance	494	$ 494
Common stock repurchased (in shares)			(120)
Common stock repurchased	(2)			(2)
Common stock issued for:
Stock options exercised and restricted stock awards (in shares)			1,130
Stock options exercised and restricted stock awards	15		$ 1	14
Stock-based compensation expense	14			14
Dividends declared - noncontrolling interest of subsidiary preferred stock	(3)							(3)
Balance, ending of period (in shares) at Mar. 31, 2022			534,587						31,686
Balance, end of period at Mar. 31, 2022	8,696		$ 334	4,769	2,996	(712)	[1]	295	$ 1,014
Balance, beginning of period (in shares) at Dec. 31, 2021			533,577						26,750
Balance, beginning of period at Dec. 31, 2021	8,494		$ 333	4,743	2,891	(288)	[1]	295	$ 520
Balance, ending of period (in shares) at Dec. 31, 2022			537,101						31,686
Balance, end of period at Dec. 31, 2022	8,547		$ 336	4,840	3,430	(1,368)	[2]	295	$ 1,014
Balance, end of period (Accounting Standards Update 2022-02) at Dec. 31, 2022	$ 4				4
Common stock issued for:
Accounting Standards Update [Extensible List]	Accounting Standards Update 2022-02
Net income	$ 255				251			4
Other comprehensive income (loss)	160					160	[2]
Preferred stock	(8)				(8)
Common stock	(82)				(82)
Common stock repurchased (in shares)			(159)
Common stock repurchased	(4)			(4)
Stock options exercised and restricted stock awards (in shares)			677
Stock options exercised and restricted stock awards	5			5
Stock-based compensation expense	22			22
Dividends declared - noncontrolling interest of subsidiary preferred stock	(4)							(4)
Balance, ending of period (in shares) at Mar. 31, 2023			537,619						31,686
Balance, end of period at Mar. 31, 2023	$ 8,895		$ 336	$ 4,863	$ 3,595	$ (1,208)	[2]	$ 295	$ 1,014

[1] Due to the nature of the preferred stock issued by FHN and its subsidiaries, all components of other comprehensive income (loss) have been attributed solely to FHN as the controlling interest holder.

[2] Due to the nature of the preferred stock issued by FHN and its subsidiaries, all components of other comprehensive income (loss) have been attributed solely to FHN as the controlling interest holder.