Consolidated Statements of Stockholders' Equity - USD ($) $ in Millions	Total	Preferred Stock	Common Stock	Retained Earnings	Accumulated Other Comprehensive Income (Loss)
Balance as of beginning-of-year at Dec. 31, 2022		$ 986	$ 4,544	$ 5,924	$ (6,352)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Issuance of common stock			0
Stock compensation/issued for benefit plans			61
Net income (loss)	$ (752)			(752)
Preferred stock dividends declared				(82)
Common stock dividends declared				(312)
Other comprehensive income (loss), net of tax	2,876				2,876
Balance as of end-of-year at Dec. 31, 2023	6,893	986	4,605	4,778	(3,476)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Issuance of common stock			0
Stock compensation/issued for benefit plans			69
Net income (loss)	3,275			3,275
Preferred stock dividends declared	(91)			(91)
Common stock dividends declared				(317)
Other comprehensive income (loss), net of tax	(1,560)				(1,560)
Balance as of end-of-year at Dec. 31, 2024	8,269	986	4,674	7,645	(5,036)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Issuance of common stock			825
Stock compensation/issued for benefit plans			93
Net income (loss)	1,177			1,177
Preferred stock dividends declared	(91)			(91)
Common stock dividends declared				(345)
Other comprehensive income (loss), net of tax	978				978
Balance as of end-of-year at Dec. 31, 2025	$ 10,906	$ 986	$ 5,592	$ 8,386	$ (4,058)