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	Series G	Series G Common Stock	Series G Capital Surplus
Balance, beginning of period (in shares) at Dec. 31, 2021		26,750	533,577
Balance, beginning of period at Dec. 31, 2021	$ 8,494	$ 520	$ 333	$ 4,743	$ 2,891	$ (288)	[1]	$ 295
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	198				195			3
Other comprehensive income (loss)	(423)					(423)	[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		31,686	534,587
Balance, end of period at Mar. 31, 2022	8,697	$ 1,014	$ 334	4,769	2,996	(711)	[1]	295
Balance, beginning of period (in shares) at Dec. 31, 2021		26,750	533,577
Balance, beginning of period at Dec. 31, 2021	8,494	$ 520	$ 333	4,743	2,891	(288)	[1]	295
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	374
Other comprehensive income (loss)	(675)
Cash dividends declared:
Preferred stock	(16)
Common stock issued for:
Series G preferred stock conversion	0
Balance, ending of period (in shares) at Jun. 30, 2022		31,686	536,333
Balance, end of period at Jun. 30, 2022	8,551	$ 1,014	$ 335	4,791	3,079	(963)	[1]	295
Balance, beginning of period (in shares) at Dec. 31, 2021		26,750	533,577
Balance, beginning of period at Dec. 31, 2021	8,494	$ 520	$ 333	4,743	2,891	(288)	[1]	295
Balance, ending of period (in shares) at Dec. 31, 2022		31,686	537,101
Balance, end of period at Dec. 31, 2022	8,547	$ 1,014	$ 336	4,840	3,430	(1,368)	[2]	295
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
Balance, beginning of period (in shares) at Mar. 31, 2022		31,686	534,587
Balance, beginning of period at Mar. 31, 2022	$ 8,697	$ 1,014	$ 334	4,769	2,996	(711)	[1]	295
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	177				174			3
Other comprehensive income (loss)	(252)					(252)	[1]
Cash dividends declared:
Preferred stock	(8)				(8)
Common stock	(83)				(83)
Common stock repurchased (in shares)			(334)
Common stock repurchased	(8)		$ (1)	(7)
Common stock issued for:
Stock options exercised and restricted stock awards (in shares)			2,080
Stock options exercised and restricted stock awards	13		$ 2	11
Stock-based compensation expense	18			18
Dividends declared - noncontrolling interest of subsidiary preferred stock	(3)							(3)
Balance, ending of period (in shares) at Jun. 30, 2022		31,686	536,333
Balance, end of period at Jun. 30, 2022	8,551	$ 1,014	$ 335	4,791	3,079	(963)	[1]	295
Balance, beginning of period (in shares) at Dec. 31, 2022		31,686	537,101
Balance, beginning of period at Dec. 31, 2022	8,547	$ 1,014	$ 336	4,840	3,430	(1,368)	[2]	295
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	255				251			4
Other comprehensive income (loss)	160					160	[2]
Cash dividends declared:
Preferred stock	(8)				(8)
Common stock	(82)				(82)
Call of preferred stock (in shares)									(4,936)
Call of preferred stock	(494)								$ (494)
Common stock repurchased (in shares)			(159)
Common stock repurchased	(4)			(4)
Common stock issued for:
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		31,686	537,619
Balance, end of period at Mar. 31, 2023	$ 8,895	$ 1,014	$ 336	4,863	3,595	(1,208)	[2]	295
Common stock issued for:
Accounting Standards Update [Extensible List]	Accounting Standards Update 2022-02
Balance, beginning of period (in shares) at Dec. 31, 2022		31,686	537,101
Balance, beginning of period at Dec. 31, 2022	$ 8,547	$ 1,014	$ 336	4,840	3,430	(1,368)	[2]	295
Balance, beginning of period (Accounting Standards Update 2022-02) at Dec. 31, 2022	4				4
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	585
Other comprehensive income (loss)	9
Cash dividends declared:
Preferred stock	(16)
Common stock issued for:
Series G preferred stock conversion	493
Balance, ending of period (in shares) at Jun. 30, 2023		26,750	558,659
Balance, end of period at Jun. 30, 2023	8,960	$ 520	$ 349	5,325	3,830	(1,359)	[2]	295
Balance, beginning of period (in shares) at Mar. 31, 2023		31,686	537,619
Balance, beginning of period at Mar. 31, 2023	8,895	$ 1,014	$ 336	4,863	3,595	(1,208)	[2]	295
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	329				325			4
Other comprehensive income (loss)	(151)					(151)	[2]
Cash dividends declared:
Preferred stock	(8)				(8)
Common stock	(82)				(82)
Common stock repurchased (in shares)			(575)
Common stock repurchased	(5)		$ 0	(5)
Common stock issued for:
Stock options exercised and restricted stock awards (in shares)			1,872
Stock options exercised and restricted stock awards	0
Series G preferred stock conversion to common stock (in shares)											19,743
Series G preferred stock conversion										$ 493	$ 12	$ 481
Stock-based compensation expense	(13)		$ 1	(14)
Dividends declared - noncontrolling interest of subsidiary preferred stock	(4)							(4)
Balance, ending of period (in shares) at Jun. 30, 2023		26,750	558,659
Balance, end of period at Jun. 30, 2023	$ 8,960	$ 520	$ 349	$ 5,325	$ 3,830	$ (1,359)	[2]	$ 295

[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.