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, 2021		$ 156	$ 0	$ 12,913	$ (143)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Common stock repurchased		3		1,012
Net earnings	$ 2,816			2,816
Dividends declared				(785)
Stock compensation		1		23
Other comprehensive income (loss), net of tax	(23)				(23)
End of period at Sep. 30, 2022	$ 13,943	154	0	13,955	(166)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Cash dividends declared per share	$ 5.03
Beginning of period at Jun. 30, 2022		155	0	13,655	(159)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Common stock repurchased		1		374
Net earnings	$ 915			915
Dividends declared				(269)
Stock compensation		0		28
Other comprehensive income (loss), net of tax	(7)				(7)
End of period at Sep. 30, 2022	$ 13,943	154	0	13,955	(166)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Cash dividends declared per share	$ 1.73
Beginning of period at Dec. 31, 2022	$ 15,312	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		0		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		0		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