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, 2023		$ 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 income (loss), 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 income (loss), 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
Beginning of period at Dec. 31, 2024	$ 15,290	145	0	15,297	(152)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Common stock repurchased		2		872
Net earnings	1,655			1,655
Dividends declared				(631)
Stock compensation				3
Other comprehensive income (loss), net of tax	28				28
End of period at Jun. 30, 2025	$ 15,471	143	0	15,452	(124)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Cash dividends declared per share	$ 4.37
Beginning of period at Mar. 31, 2025		144	0	14,982	(142)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Common stock repurchased		1		391
Net earnings	$ 1,174			1,174
Dividends declared				(332)
Stock compensation				19
Other comprehensive income (loss), net of tax	18				18
End of period at Jun. 30, 2025	$ 15,471	$ 143	$ 0	$ 15,452	$ (124)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Cash dividends declared per share	$ 2.31