Consolidated Statements of Changes In Shareholders' Equity (Unaudited) - USD ($) $ in Millions		Preferred Stock [Member]	Common Stock [Member]	Additional Paid-in Capital [Member]	Retained Earnings [Member]	Treasury Stock [Member]	AOCI Attributable to Parent [Member]	Parent [Member]	Noncontrolling Interest [Member]	Total
Balance at Dec. 31, 2020		$ 2,300	$ 863	$ 14,642	$ 16,120	$ (19,928)	$ (740)	$ 13,257	$ 191	$ 13,448
Net income (loss)					599			599	2	601
Other comprehensive income (loss)							(352)	(352)	(1)	(353)
Shares issued to benefit plans and for option exercises			1	80				81		81
Common dividends					(187)			(187)		(187)
Other, net	[1]				1	(6)		(5)	(3)	(8)
Preferred dividends					(24)			(24)		(24)
Balance at Mar. 31, 2021		2,300	864	14,722	16,509	(19,934)	(1,092)	13,369	189	13,558
Balance at Dec. 31, 2020		2,300	863	14,642	16,120	(19,928)	(740)	13,257	191	13,448
Net income (loss)										1,439
Balance at Sep. 30, 2021		0	907	16,398	16,110	(20,011)	(1,259)	12,145	210	12,355
Balance at Mar. 31, 2021		2,300	864	14,722	16,509	(19,934)	(1,092)	13,369	189	13,558
Net income (loss)					449			449	5	454
Other comprehensive income (loss)							40	40	1	41
Purchase of common stock for treasury						(1)		(1)		(1)
Shares issued to benefit plans and for option exercises			3	70				73		73
Common dividends					(416)			(416)		(416)
Other, net	[1]					(51)		(51)	(13)	(64)
Redemption of preferred stock (2)	[2]	(700)			(803)			(1,503)		(1,503)
Conversion of preferred stock to common stock (3)	[3]	(1,600)	40	1,560				0		0
Balance at Jun. 30, 2021		0	907	16,352	15,739	(19,986)	(1,052)	11,960	182	12,142
Net income (loss)					371			371	13	384
Other comprehensive income (loss)							(207)	(207)	(1)	(208)
Purchase of common stock for treasury						(24)		(24)		(24)
Shares issued to benefit plans and for option exercises				46				46		46
Other, net						(1)		(1)	16	15
Balance at Sep. 30, 2021		$ 0	907	16,398	16,110	(20,011)	(1,259)	12,145	210	12,355
Balance at Dec. 31, 2021			907	16,475	16,389	(20,263)	(1,175)	12,333	212	12,545
Net income (loss)					581			581	22	603
Other comprehensive income (loss)							(187)	(187)		(187)
Purchase of common stock for treasury						(151)		(151)		(151)
Shares issued to benefit plans and for option exercises			1	56				57		57
Common dividends					(233)			(233)		(233)
Other, net	[1]					(5)		(5)		(5)
Balance at Mar. 31, 2022			908	16,531	16,737	(20,419)	(1,362)	12,395	234	12,629
Balance at Dec. 31, 2021			907	16,475	16,389	(20,263)	(1,175)	12,333	212	12,545
Net income (loss)										1,413
Balance at Sep. 30, 2022			910	16,649	17,044	(20,528)	(2,791)	11,284	264	11,548
Balance at Mar. 31, 2022			908	16,531	16,737	(20,419)	(1,362)	12,395	234	12,629
Net income (loss)					563			563	21	584
Other comprehensive income (loss)							(732)	(732)	(2)	(734)
Purchase of common stock for treasury						(53)		(53)		(53)
Shares issued to benefit plans and for option exercises			2	59				61		61
Common dividends					(463)			(463)		(463)
Other, net	[1]					(37)		(37)	(5)	(42)
Balance at Jun. 30, 2022			910	16,590	16,837	(20,509)	(2,094)	11,734	248	11,982
Net income (loss)					208			208	18	226
Other comprehensive income (loss)							(697)	(697)	(2)	(699)
Purchase of common stock for treasury						(17)		(17)		(17)
Shares issued to benefit plans and for option exercises				59				59		59
Other, net					(1)	(2)		(3)		(3)
Balance at Sep. 30, 2022			$ 910	$ 16,649	$ 17,044	$ (20,528)	$ (2,791)	$ 11,284	$ 264	$ 11,548

[1] Treasury stock includes the deemed surrender to the Company of common stock to satisfy employee tax withholding obligations.

[2] Refer to Note 4 (Earnings (Loss) per Common Share) and Note 12 (Shareholders' Equity) to the consolidated financial statements for additional information.

[3] Refer to Note 12 (Shareholders' Equity) to the consolidated financial statements for additional information.