Consolidated Statements of Changes in Equity - USD ($) shares in Millions, $ in Millions	Total	Senior Preferred Stock	Preferred Stock	Common Stock	Accumulated Deficit	Accumulated Other Comprehensive Income	Treasury Stock
Beginning balance (shares) at Dec. 31, 2020		1	556	1,158
Beginning balance at Dec. 31, 2020	$ 25,259	$ 120,836	$ 19,130	$ 687	$ (108,110)	$ 116	$ (7,400)
Comprehensive income:
Net income	22,176				22,176
Other comprehensive income, net of tax effect:
Changes in net unrealized losses on available-for-sale securities, net of taxes	(18)					(18)
Reclassification adjustment for gains (losses) included in net income, net of taxes	(49)					(49)
Other, net of taxes	(11)					(11)
Total comprehensive income	22,098
Ending balance (shares) at Dec. 31, 2021		1	556	1,158
Ending balance at Dec. 31, 2021	47,357	$ 120,836	$ 19,130	$ 687	(85,934)	38	(7,400)
Comprehensive income:
Net income	12,923				12,923
Other comprehensive income, net of tax effect:
Changes in net unrealized losses on available-for-sale securities, net of taxes	(33)					(33)
Reclassification adjustment for gains (losses) included in net income, net of taxes	13					13
Other, net of taxes	17					17
Total comprehensive income	12,920
Ending balance (shares) at Dec. 31, 2022		1	556	1,158
Ending balance at Dec. 31, 2022	60,277	$ 120,836	$ 19,130	$ 687	(73,011)	35	(7,400)
Comprehensive income:
Net income	17,408				17,408
Other comprehensive income, net of tax effect:
Changes in net unrealized losses on available-for-sale securities, net of taxes	(4)					(4)
Reclassification adjustment for gains (losses) included in net income, net of taxes	2					2
Other, net of taxes	(1)					(1)
Total comprehensive income	17,405
Ending balance (shares) at Dec. 31, 2023		1	556	1,158
Ending balance at Dec. 31, 2023	$ 77,682	$ 120,836	$ 19,130	$ 687	$ (55,603)	$ 32	$ (7,400)