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	4,408				4,408
Other comprehensive income, net of tax effect:
Changes in net unrealized gains on available-for-sale securities, net of taxes	(9)					(9)
Reclassification adjustment for gains included in net income, net of taxes	4					4
Other, net of taxes	(2)					(2)
Total comprehensive income	4,401
Ending balance (shares) at Mar. 31, 2022		1	556	1,158
Ending balance at Mar. 31, 2022	51,758	$ 120,836	$ 19,130	$ 687	(81,526)	31	(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	3,772				3,772
Other comprehensive income, net of tax effect:
Changes in net unrealized gains on available-for-sale securities, net of taxes	2					2
Other, net of taxes	(2)					(2)
Total comprehensive income	3,772
Ending balance (shares) at Mar. 31, 2023		1	556	1,158
Ending balance at Mar. 31, 2023	$ 64,049	$ 120,836	$ 19,130	$ 687	$ (69,239)	$ 35	$ (7,400)