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	(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, 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					(5)		(5)		(5)
Balance at Mar. 31, 2022		$ 908	$ 16,531	$ 16,737	$ (20,419)	$ (1,362)	$ 12,395	$ 234	$ 12,629