Consolidated Statements of Shareholders' Equity (Unaudited) - USD ($) $ in Millions	Total	Preferred Shares	Common Shares	Additional Paid-in Capital	Accumulated Other Comprehensive Income (Loss)	Retained Earnings	Series D Preferred Stock	Series D Preferred Stock Retained Earnings
Beginning Balance at Dec. 31, 2023	$ 28,057	$ 0	$ 145	$ 11,372	$ (3,072)	$ 19,612
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	7,959					7,959
Other comprehensive income (loss)	(123)				(123)	0
Repurchase of common shares	(4,822)		(4)	(321)		(4,497)
Other changes	184			244		(60)
Cash dividends declared preferred							$ (44)	$ (44)
Cash dividends declared common	(1,504)					(1,504)
Ending Balance at Sep. 30, 2024	29,707	0	141	11,295	(3,195)	21,466
Beginning Balance at Jun. 30, 2024	29,540	0	143	11,332	(3,200)	21,265
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	2,507					2,507
Other comprehensive income (loss)	5				5	0
Repurchase of common shares	(1,919)		(2)	(121)		(1,796)
Other changes	83			84		(1)
Cash dividends declared preferred							(15)	(15)
Cash dividends declared common	(494)					(494)
Ending Balance at Sep. 30, 2024	29,707	0	141	11,295	(3,195)	21,466
Beginning Balance at Dec. 31, 2024	30,264	0	141	11,370	(3,395)	22,148
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	8,371					8,371
Other comprehensive income (loss)	146				146	0
Repurchase of common shares	(4,412)		(3)	(233)		(4,176)
Other changes	(190)			(78)		(112)
Cash dividends declared preferred							(43)	(43)
Cash dividends declared common	(1,719)					(1,719)
Ending Balance at Sep. 30, 2025	32,417	0	138	11,059	(3,249)	24,469
Beginning Balance at Jun. 30, 2025	32,311	0	140	11,052	(3,248)	24,367
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	2,902					2,902
Other comprehensive income (loss)	(1)				(1)	0
Repurchase of common shares	(2,338)		(2)	(119)		(2,217)
Other changes	124			126		(2)
Cash dividends declared preferred							$ (14)	$ (14)
Cash dividends declared common	(567)					(567)
Ending Balance at Sep. 30, 2025	$ 32,417	$ 0	$ 138	$ 11,059	$ (3,249)	$ 24,469