Consolidated Statements of Changes in Shareholders' Equity - USD ($) $ in Millions	Total	Previously Reported [Member]	Effect of adoption of ASU 2018-12 [Member]	Common stock and capital in excess of par value	Common stock and capital in excess of par value Previously Reported [Member]	Accumulated other comprehensive income	Accumulated other comprehensive income Previously Reported [Member]	Accumulated other comprehensive income Effect of adoption of ASU 2018-12 [Member]	Retained earnings	Retained earnings Previously Reported [Member]	Retained earnings Effect of adoption of ASU 2018-12 [Member]	Treasury Stock	Treasury Stock Previously Reported [Member]	Noncontrolling interests	Noncontrolling interests Previously Reported [Member]
Beginning Balance at Dec. 31, 2020	$ 444,908	$ 451,336	$ (6,428)	$ 35,634	$ 35,634	$ (9,994)	$ (4,243)	$ (5,751)	$ 443,949	$ 444,626	$ (677)	$ (32,853)	$ (32,853)	$ 8,172	$ 8,172
Accounting Standards Update [Extensible Enumeration]	ASU 2018-12 [Member]
Net earnings (loss)	$ 90,949								89,937					1,012
Other comprehensive income, net	1,889					1,871								18
Acquisition of common stock	(26,942)											(26,942)
Transactions with noncontrolling interests and other	(505)			(34)										(471)
Ending Balance at Dec. 31, 2021	510,299			35,600		(8,123)			533,886			(59,795)		8,731
Net earnings (loss)	(21,998)								(22,759)					761
Other comprehensive income, net	3,010					3,071								(61)
Acquisition of common stock	(8,031)											(8,031)
Transactions with noncontrolling interests and other	(1,599)			(425)										(1,174)
Ending Balance at Dec. 31, 2022	481,681			35,175		(5,052)			511,127			(67,826)		8,257
Net earnings (loss)	97,147								96,223					924
Other comprehensive income, net	1,318					1,289								29
Acquisition of common stock	(8,976)											(8,976)
Transactions with noncontrolling interests and other	(3,661)			(687)										(2,974)
Ending Balance at Dec. 31, 2023	$ 567,509			$ 34,488		$ (3,763)			$ 607,350			$ (76,802)		$ 6,236