Condensed Consolidated Statements of Changes in Equity (Unaudited) - USD ($) shares in Millions, $ in Millions	Total	Senior Preferred	Preferred	Common	Accumulated Deficit	Accumulated Other Comprehensive Income	Treasury Stock
Beginning balance (shares) at Dec. 31, 2022		1	556	1,158
Beginning balance at Dec. 31, 2022	$ 60,277	$ 120,836	$ 19,130	$ 687	$ (73,011)	$ 35	$ (7,400)
Comprehensive income:
Net income	13,465				13,465
Other comprehensive income, net of tax effect:
Changes in net unrealized gains (losses) on available-for-sale securities, net of taxes	(12)					(12)
Other, net of taxes	(5)					(5)
Total comprehensive income	13,448
Ending balance (shares) at Sep. 30, 2023		1	556	1,158
Ending balance at Sep. 30, 2023	73,725	$ 120,836	$ 19,130	$ 687	(59,546)	18	(7,400)
Beginning balance (shares) at Jun. 30, 2023		1	556	1,158
Beginning balance at Jun. 30, 2023	69,044	$ 120,836	$ 19,130	$ 687	(64,245)	36	(7,400)
Comprehensive income:
Net income	4,699				4,699
Other comprehensive income, net of tax effect:
Changes in net unrealized gains (losses) on available-for-sale securities, net of taxes	(16)					(16)
Other, net of taxes	(2)					(2)
Total comprehensive income	4,681
Ending balance (shares) at Sep. 30, 2023		1	556	1,158
Ending balance at Sep. 30, 2023	73,725	$ 120,836	$ 19,130	$ 687	(59,546)	18	(7,400)
Beginning balance (shares) at Dec. 31, 2023		1	556	1,158
Beginning balance at Dec. 31, 2023	77,682	$ 120,836	$ 19,130	$ 687	(55,603)	32	(7,400)
Comprehensive income:
Net income	12,848				12,848
Other comprehensive income, net of tax effect:
Changes in net unrealized gains (losses) on available-for-sale securities, net of taxes	3					3
Reclassification adjustment for (gains) losses included in net income, net of taxes	2					2
Other, net of taxes	(5)					(5)
Total comprehensive income	12,848
Ending balance (shares) at Sep. 30, 2024		1	556	1,158
Ending balance at Sep. 30, 2024	90,530	$ 120,836	$ 19,130	$ 687	(42,755)	32	(7,400)
Beginning balance (shares) at Jun. 30, 2024		1	556	1,158
Beginning balance at Jun. 30, 2024	86,483	$ 120,836	$ 19,130	$ 687	(46,799)	29	(7,400)
Comprehensive income:
Net income	4,044				4,044
Other comprehensive income, net of tax effect:
Changes in net unrealized gains (losses) on available-for-sale securities, net of taxes	4					4
Reclassification adjustment for (gains) losses included in net income, net of taxes	1					1
Other, net of taxes	(2)					(2)
Total comprehensive income	4,047
Ending balance (shares) at Sep. 30, 2024		1	556	1,158
Ending balance at Sep. 30, 2024	$ 90,530	$ 120,836	$ 19,130	$ 687	$ (42,755)	$ 32	$ (7,400)