Condensed Consolidated Statements of Equity - USD ($) $ in Millions	Total	Total Shareholders' Equity	Preferred Stock	Common Stock	Additional Paid-In Capital	Treasury stock at cost	Accumulated Other Comprehensive Income	Retained Earnings	Non-Controlling Interests
Balance beginning of period at Dec. 31, 2022	$ 9,378	$ 8,646	$ 0	$ 1	$ 6,063	$ (443)	$ (3,378)	$ 6,403	$ 732
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income (loss)	(1,496)	(1,497)						(1,497)	1
Other comprehensive income (loss)	1,070	1,070					1,070
Change in equity of noncontrolling interests	96								96
Dividends on preferred stock	0
Dividends on common stock	(54)	(54)						(54)
Purchase of treasury stock	(70)	(70)				(70)
Issuance of preferred stock	533	533		533
Share based compensation	10	10			7	3
Balance end of period at Mar. 31, 2023	9,467	8,638	533	1	6,070	(510)	(2,308)	4,852	829
Balance beginning of period at Dec. 31, 2022	9,378	8,646	0	1	6,063	(443)	(3,378)	6,403	732
Balance end of period at Dec. 31, 2023	10,334	10,170	533	1	6,005	(599)	(2,808)	7,038	164
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income (loss)	802	795						795	7
Other comprehensive income (loss)	(615)	(615)					(615)
Change in equity of noncontrolling interests	16								16
Dividends on preferred stock	(11)	(11)						(11)
Dividends on common stock	(56)	(56)						(56)
Purchase of treasury stock	(120)	(120)				(120)
Share based compensation	6	6				6
Balance end of period at Mar. 31, 2024	$ 10,356	$ 10,169	$ 533	$ 1	$ 6,005	$ (713)	$ (3,423)	$ 7,766	$ 187