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	2,123					2,123
Other comprehensive income (loss), net of tax	52						52
Dividends on common stock	(325)					(325)
Dividends on preferred stock	(390)					(390)
Preferred stock redemption - face value	(1,169)	(1,169)
Preferred stock redemption - premium	(117)					(117)
Preferred stock redemption value in excess of carrying value	0	28				(28)
Shareholder warrants exercised	3				3
Options exercised	13				13
Issuance of common stock and other, net of cancellations	22		1		21
Purchases of treasury stock	(1,186)			(1,186)
Ending balance at Jun. 30, 2023	29,111	8,621	221	(14,958)	17,218	17,762	247
Beginning balance at Mar. 31, 2023	29,559	9,130	221	(14,524)	17,159	17,318	255
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	860					860
Other comprehensive income (loss), net of tax	(8)						(8)
Dividends on common stock	(161)					(161)
Dividends on preferred stock	(190)					(190)
Preferred stock redemption - face value	(522)	(522)
Preferred stock redemption - premium	(52)					(52)
Preferred stock redemption value in excess of carrying value	0	13				(13)
Shareholder warrants exercised	1				1
Options exercised	6				6
Issuance of common stock and other, net of cancellations	52				52
Purchases of treasury stock	(434)			(434)
Ending balance at Jun. 30, 2023	29,111	8,621	221	(14,958)	17,218	17,762	247
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	2,058					2,050		8
Other comprehensive income (loss), net of tax	(11)						(11)
Dividends on common stock	(398)					(398)
Dividends on preferred stock	(340)					(340)
Shareholder warrants exercised	487		4		483
Issuance of common stock and other, net of cancellations	24		1		23
Purchases of treasury stock	(9)			(9)
Noncontrolling interest contributions	99							99
Ending balance, including NCI at Jun. 30, 2024	32,259	8,287	227	(15,591)	17,928	20,938	264	206
Ending balance at Jun. 30, 2024	32,053
Beginning balance, including NCI at Mar. 31, 2024	30,967	8,287	223	(15,582)	17,456	20,147	280	156
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	1,170					1,162		8
Other comprehensive income (loss), net of tax	(16)						(16)
Dividends on common stock	(201)					(201)
Dividends on preferred stock	(170)					(170)
Shareholder warrants exercised	415		4		411
Issuance of common stock and other, net of cancellations	61				61
Purchases of treasury stock				(9)
Noncontrolling interest contributions	42							42
Ending balance, including NCI at Jun. 30, 2024	32,259	$ 8,287	$ 227	$ (15,591)	$ 17,928	$ 20,938	$ 264	$ 206
Ending balance at Jun. 30, 2024	$ 32,053