Condensed Consolidated Statements of Equity - USD ($) shares in Millions, $ in Millions		Total		Preferred Stock		Common Stock		Additional Paid-In Capital		Treasury stock at cost		Accumulated Other Comprehensive Income		Retained Earnings		Total Shareholders' Equity		Non-Controlling Interests
Balance beginning of period at Dec. 31, 2021	[1]	$ 8,321		$ 0		$ 1		$ 6,051		$ (211)		$ 1,360		$ 440		$ 7,641		$ 680
Balance end of period at Mar. 31, 2022	[1]	8,909		0		1		6,081		(351)		(119)		2,582		8,194		715
Balance beginning of period at Dec. 31, 2021	[1]	8,321		0		1		6,051		(211)		1,360		440		7,641		680
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income (loss)		5,519	[2]											5,457		5,457		62
Other comprehensive income (loss)	[3]	(3,099)
Change in equity of noncontrolling interests		5																5
Dividends on preferred stock		0
Dividends on common stock		(102)												(102)		(102)
Purchase of treasury stock		(240)								(240)						(240)
Share based compensation		49						(31)		80						49
Balance end of period at Jun. 30, 2022	[1]	10,453		0		1		6,020		(371)		(1,739)		5,795		9,706		747
Balance beginning of period at Dec. 31, 2021	[1]	8,321		0		1		6,051		(211)		1,360		440		7,641		680
Balance end of period at Dec. 31, 2022		9,378	[4]	0	[1]	1	[1]	6,063	[1]	(443)	[1]	(3,378)	[1]	6,403	[1]	8,646	[1]	732	[1]
Balance beginning of period at Mar. 31, 2022	[1]	8,909		0		1		6,081		(351)		(119)		2,582		8,194		715
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income (loss)		3,294	[5]											3,263		3,263		31
Other comprehensive income (loss)		(1,620)	[3]									(1,620)				(1,620)
Change in equity of noncontrolling interests		1																1
Dividends on preferred stock		0
Dividends on common stock		(50)												(50)		(50)
Purchase of treasury stock		(100)								(100)						(100)
Share based compensation		19						(61)		80						19
Balance end of period at Jun. 30, 2022	[1]	10,453		0		1		6,020		(371)		(1,739)		5,795		9,706		747
Balance beginning of period at Dec. 31, 2022		9,378	[4]	0	[1]	1	[1]	6,063	[1]	(443)	[1]	(3,378)	[1]	6,403	[1]	8,646	[1]	732	[1]
Balance end of period at Mar. 31, 2023		9,467		533		1		6,070		(510)		(2,308)		4,852		8,638		829
Balance beginning of period at Dec. 31, 2022		9,378	[4]	0	[1]	1	[1]	6,063	[1]	(443)	[1]	(3,378)	[1]	6,403	[1]	8,646	[1]	732	[1]
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income (loss)		(276)												(280)		(280)		4
Other comprehensive income (loss)		13										13				13
Change in equity of noncontrolling interests		35																35
Dividends on preferred stock		(13)												(13)		(13)
Dividends on common stock		(107)												(107)		(107)
Purchase of treasury stock		$ (164)								(164)						(164)
Issuance of preferred stock (in shares)		533
Issuance of preferred stock		$ 533														533
Share based compensation		24						(66)		141				(51)		24
Balance end of period at Jun. 30, 2023		9,423		533		1		5,997		(466)		(3,365)		5,952		8,652		771
Balance beginning of period at Mar. 31, 2023		9,467		533		1		6,070		(510)		(2,308)		4,852		8,638		829
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income (loss)		1,220												1,217		1,217		3
Other comprehensive income (loss)		(1,057)										(1,057)				(1,057)
Change in equity of noncontrolling interests		(61)																(61)
Dividends on preferred stock		(13)												(13)		(13)
Dividends on common stock		(53)												(53)		(53)
Purchase of treasury stock		(94)								(94)						(94)
Share based compensation		14						(73)		138				(51)		14
Balance end of period at Jun. 30, 2023		$ 9,423		$ 533		$ 1		$ 5,997		$ (466)		$ (3,365)		$ 5,952		$ 8,652		$ 771

[1] (1) Recast for the adoption of ASU 2018-12. See Notes 1 and 2 to the Condensed Consolidated Financial Statements.

[2] (1) Recast for the adoption of ASU 2018-12. See Notes 1 and 2 to the Condensed Consolidated Financial Statements.

[3] (1) Recast for the adoption of ASU 2018-12. See Notes 1 and 2 to the Condensed Consolidated Financial Statements.

[4] (1) Recast for the adoption of ASU 2018-12. See Notes 1 and 2 to the Condensed Consolidated Financial Statements.

[5] (1) Recast for the adoption of ASU 2018-12. See Notes 1 and 2 to the Condensed Consolidated Financial Statements.