Condensed Consolidated Statements of Changes in Shareholders' Equity (Unaudited) - USD ($) $ in Millions	Total	Common stock	Paid-in capital	Retained earnings	Accumulated other comprehensive loss
Beginning of period at Dec. 31, 2022		$ 153	$ 0	$ 15,312	$ (153)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Common stock repurchased		2		1,162
Net earnings	$ 2,591			2,591
Dividends declared				(832)
Stock compensation				15
Other comprehensive income (loss), net of tax	6				6
End of period at Sep. 30, 2023	$ 15,928	151	0	15,924	(147)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Cash dividends declared per share	$ 5.47
Beginning of period at Jun. 30, 2023		151	0	15,485	(150)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Common stock repurchased		0		232
Net earnings	$ 937			937
Dividends declared				(283)
Stock compensation				17
Other comprehensive income (loss), net of tax	3				3
End of period at Sep. 30, 2023	$ 15,928	151	0	15,924	(147)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Cash dividends declared per share	$ 1.87
Beginning of period at Dec. 31, 2023	$ 14,795	150	0	14,773	(128)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Common stock repurchased		4		2,076
Net earnings	2,910			2,910
Dividends declared				(885)
Stock compensation				16
Other comprehensive income (loss), net of tax	(8)				(8)
End of period at Sep. 30, 2024	$ 14,748	146	0	14,738	(136)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Cash dividends declared per share	$ 5.99
Beginning of period at Jun. 30, 2024		146	0	14,301	(146)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Common stock repurchased		0		313
Net earnings	$ 1,026			1,026
Dividends declared				(302)
Stock compensation				26
Other comprehensive income (loss), net of tax	10				10
End of period at Sep. 30, 2024	$ 14,748	$ 146	$ 0	$ 14,738	$ (136)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Cash dividends declared per share	$ 2.06