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		1		315
Net earnings	$ 955			955
Dividends declared				(246)
Stock compensation		1		(30)
Other comprehensive income (loss), net of tax	(3)				(3)
End of period at Mar. 31, 2022	13,287	156	0	13,277	(146)
Beginning of period at Dec. 31, 2022	15,312	153	0	15,312	(153)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Common stock repurchased		1		726
Net earnings	842			842
Dividends declared				(265)
Stock compensation		0		(28)
Other comprehensive income (loss), net of tax	2				2
End of period at Mar. 31, 2023	$ 15,136	$ 152	$ 0	$ 15,135	$ (151)