Consolidated Condensed Statements of Equity - USD ($) $ in Millions	Total	Preferred Stock	Common Stock	Treasury Stock	Additional Paid-in Capital	Retained Earnings	Accumulated Other Comprehensive Income	Non-controlling Interests
Beginning balance at Dec. 31, 2022	$ 30,085	$ 9,762	$ 220	$ (13,772)	$ 17,181	$ 16,499	$ 195
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	1,263					1,263
Other comprehensive income, net of tax	60						60
Dividends on common stock	(164)					(164)
Dividends on preferred stock	(200)					(200)
Preferred stock redemption - face value	(647)	(647)
Preferred stock redemption - premium	(65)					(65)
Preferred stock redemption value in excess of carrying value	0	15				(15)
Shareholder warrants exercised	2				2
Options exercised	7				7
Issuance of common stock and other, net of cancellations	(30)		1		(31)
Purchases of treasury stock	(752)			(752)
Ending balance at Mar. 31, 2023	29,559	9,130	221	(14,524)	17,159	17,318	255
Beginning balance at Dec. 31, 2023	30,250
Beginning balance, including NCI at Dec. 31, 2023	30,349	8,287	222	(15,582)	17,422	19,626	275	$ 99
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	888					888
Other comprehensive income, net of tax	5						5
Dividends on common stock	(197)					(197)
Dividends on preferred stock	(170)					(170)
Shareholder warrants exercised	72				72
Issuance of common stock and other, net of cancellations	(37)		1		(38)
Noncontrolling interest contributions	57							57
Ending balance at Mar. 31, 2024	30,811
Ending balance, including NCI at Mar. 31, 2024	$ 30,967	$ 8,287	$ 223	$ (15,582)	$ 17,456	$ 20,147	$ 280	$ 156