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, 2021		1	556	1,158
Beginning balance at Dec. 31, 2021	$ 47,357	$ 120,836	$ 19,130	$ 687	$ (85,934)	$ 38	$ (7,400)
Comprehensive income:
Net income	11,497				11,497
Other comprehensive income, net of tax effect:
Changes in net unrealized gains on available-for-sale securities, net of taxes	(19)					(19)
Reclassification adjustment for gains included in net income, net of taxes	11					11
Other, net of taxes	(6)					(6)
Total comprehensive income	11,483
Ending balance (shares) at Sep. 30, 2022		1	556	1,158
Ending balance at Sep. 30, 2022	58,840	$ 120,836	$ 19,130	$ 687	(74,437)	24	(7,400)
Beginning balance (shares) at Jun. 30, 2022		1	556	1,158
Beginning balance at Jun. 30, 2022	56,407	$ 120,836	$ 19,130	$ 687	(76,873)	27	(7,400)
Comprehensive income:
Net income	2,436				2,436
Other comprehensive income, net of tax effect:
Changes in net unrealized gains on available-for-sale securities, net of taxes	(4)					(4)
Reclassification adjustment for gains included in net income, net of taxes	3					3
Other, net of taxes	(2)					(2)
Total comprehensive income	2,433
Ending balance (shares) at Sep. 30, 2022		1	556	1,158
Ending balance at Sep. 30, 2022	58,840	$ 120,836	$ 19,130	$ 687	(74,437)	24	(7,400)
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 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 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)