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		930
Net earnings	$ 1,654			1,654
Dividends declared				(549)
Stock compensation				(2)
Other comprehensive (loss) income, net of tax	3				3
End of period at Jun. 30, 2023	$ 15,486	151	0	15,485	(150)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Cash dividends declared per share	$ 3.60
Beginning of period at Mar. 31, 2023		152	0	15,135	(151)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Common stock repurchased		1		204
Net earnings	$ 812			812
Dividends declared				(284)
Stock compensation				26
Other comprehensive (loss) income, net of tax	1				1
End of period at Jun. 30, 2023	$ 15,486	151	0	15,485	(150)
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		1,763
Net earnings	1,884			1,884
Dividends declared				(583)
Stock compensation				(10)
Other comprehensive (loss) income, net of tax	(18)				(18)
End of period at Jun. 30, 2024	$ 14,301	146	0	14,301	(146)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Cash dividends declared per share	$ 3.93
Beginning of period at Mar. 31, 2024		148	0	14,218	(143)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Common stock repurchased		2		577
Net earnings	$ 940			940
Dividends declared				(304)
Stock compensation				24
Other comprehensive (loss) income, net of tax	(3)				(3)
End of period at Jun. 30, 2024	$ 14,301	$ 146	$ 0	$ 14,301	$ (146)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Cash dividends declared per share	$ 2.06