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	9,061				9,061
Other comprehensive income, net of tax effect:
Changes in net unrealized gains on available-for-sale securities, net of taxes	(15)					(15)
Reclassification adjustment for gains included in net income, net of taxes	8					8
Other, net of taxes	(4)					(4)
Total comprehensive income	9,050
Ending balance (shares) at Jun. 30, 2022		1	556	1,158
Ending balance at Jun. 30, 2022	56,407	$ 120,836	$ 19,130	$ 687	(76,873)	27	(7,400)
Other comprehensive income, net of tax effect:
Changes in net unrealized gains on available-for-sale securities, tax	4
Other, tax	1
Beginning balance (shares) at Mar. 31, 2022		1	556	1,158
Beginning balance at Mar. 31, 2022	51,758	$ 120,836	$ 19,130	$ 687	(81,526)	31	(7,400)
Comprehensive income:
Net income	4,653				4,653
Other comprehensive income, net of tax effect:
Changes in net unrealized gains on available-for-sale securities, net of taxes	(6)					(6)
Reclassification adjustment for gains included in net income, net of taxes	4					4
Other, net of taxes	(2)					(2)
Total comprehensive income	4,649
Ending balance (shares) at Jun. 30, 2022		1	556	1,158
Ending balance at Jun. 30, 2022	56,407	$ 120,836	$ 19,130	$ 687	(76,873)	27	(7,400)
Other comprehensive income, net of tax effect:
Changes in net unrealized gains on available-for-sale securities, tax	2
Other, tax	1
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	8,766				8,766
Other comprehensive income, net of tax effect:
Changes in net unrealized gains on available-for-sale securities, net of taxes	4					4
Other, net of taxes	(3)					(3)
Total comprehensive income	8,767
Ending balance (shares) at Jun. 30, 2023		1	556	1,158
Ending balance at Jun. 30, 2023	69,044	$ 120,836	$ 19,130	$ 687	(64,245)	36	(7,400)
Other comprehensive income, net of tax effect:
Changes in net unrealized gains on available-for-sale securities, tax	1
Other, tax	1
Beginning balance (shares) at Mar. 31, 2023		1	556	1,158
Beginning balance at Mar. 31, 2023	64,049	$ 120,836	$ 19,130	$ 687	(69,239)	35	(7,400)
Comprehensive income:
Net income	4,994				4,994
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	(1)					(1)
Total comprehensive income	4,995
Ending balance (shares) at Jun. 30, 2023		1	556	1,158
Ending balance at Jun. 30, 2023	69,044	$ 120,836	$ 19,130	$ 687	$ (64,245)	$ 36	$ (7,400)
Other comprehensive income, net of tax effect:
Changes in net unrealized gains on available-for-sale securities, tax	1
Other, tax	$ 1