Consolidated Statements of Changes in Shareholders' Equity - USD ($) $ in Millions	Total	Common stock and capital in excess of par value	Accumulated other comprehensive income	Retained earnings	Treasury Stock	Noncontrolling interests	Cumulative Effect, Period of Adoption, Adjusted Balance [Member]	Cumulative Effect, Period of Adoption, Adjusted Balance [Member] Common stock and capital in excess of par value	Cumulative Effect, Period of Adoption, Adjusted Balance [Member] Accumulated other comprehensive income	Cumulative Effect, Period of Adoption, Adjusted Balance [Member] Retained earnings	Cumulative Effect, Period of Adoption, Adjusted Balance [Member] Treasury Stock	Cumulative Effect, Period of Adoption, Adjusted Balance [Member] Noncontrolling interests	Originally, Previously reported [Member]	Originally, Previously reported [Member] Common stock and capital in excess of par value	Originally, Previously reported [Member] Accumulated other comprehensive income	Originally, Previously reported [Member] Retained earnings	Originally, Previously reported [Member] Treasury Stock	Originally, Previously reported [Member] Noncontrolling interests	Effect of adoption of ASU 2018-12 [Member]	Effect of adoption of ASU 2018-12 [Member] Accumulated other comprehensive income	Effect of adoption of ASU 2018-12 [Member] Retained earnings
Beginning Balance at Dec. 31, 2021	$ 514,930	$ 35,600	$ (4,027)	$ 534,421	$ (59,795)	$ 8,731	$ 510,299	$ 35,600	$ (8,123)	$ 533,886	$ (59,795)	$ 8,731							$ (4,631)	$ (4,096)	$ (535)
Accounting Standards Update [Extensible Enumeration]	Accounting Standards Update 2018-12 [Member]
Net earnings (loss)	$ 5,705			5,580		125
Other comprehensive income, net	2,016		2,019			(3)
Acquisition of common stock	(3,111)				(3,111)
Transactions with noncontrolling interests and other	(135)	(6)				(129)
Ending Balance at Mar. 31, 2022	514,774	35,594	(6,104)	539,466	(62,906)	8,724
Beginning Balance at Dec. 31, 2021	$ 514,930	35,600	(4,027)	534,421	(59,795)	8,731	$ 510,299	$ 35,600	$ (8,123)	$ 533,886	$ (59,795)	$ 8,731							(4,631)	(4,096)	(535)
Accounting Standards Update [Extensible Enumeration]	Accounting Standards Update 2018-12 [Member]
Net earnings (loss)	$ (37,537)												$ (37,791)
Other comprehensive income, net	2,388												(2,180)
Ending Balance at Jun. 30, 2022	469,844	35,212	(5,703)	495,845	(63,934)	8,424
Beginning Balance at Mar. 31, 2022	514,774	35,594	(6,104)	539,466	(62,906)	8,724
Net earnings (loss)	(43,242)			(43,621)		379							(43,376)
Other comprehensive income, net	372		401			(29)							(1,776)
Acquisition of common stock	(1,028)				(1,028)
Transactions with noncontrolling interests and other	(1,032)	(382)				(650)
Ending Balance at Jun. 30, 2022	469,844	35,212	(5,703)	495,845	(63,934)	8,424
Beginning Balance at Dec. 31, 2022	$ 481,681	35,175	(5,052)	511,127	(67,826)	8,257							480,617	$ 35,175	$ (6,591)	$ 511,602	$ (67,826)	$ 8,257	1,064	1,539	(475)
Accounting Standards Update [Extensible Enumeration]	Accounting Standards Update 2018-12 [Member]
Net earnings (loss)	$ 35,757			35,504		253
Other comprehensive income, net	82		76			6
Acquisition of common stock	(4,439)				(4,439)
Transactions with noncontrolling interests and other	(4)	(11)				7
Ending Balance at Mar. 31, 2023	513,077	35,164	(4,976)	546,631	(72,265)	8,523
Beginning Balance at Dec. 31, 2022	$ 481,681	35,175	(5,052)	511,127	(67,826)	8,257							$ 480,617	$ 35,175	$ (6,591)	$ 511,602	$ (67,826)	$ 8,257	$ 1,064	$ 1,539	$ (475)
Accounting Standards Update [Extensible Enumeration]	Accounting Standards Update 2018-12 [Member]
Net earnings (loss)	$ 71,956
Other comprehensive income, net	839
Ending Balance at Jun. 30, 2023	548,551	35,148	(4,240)	582,543	(73,568)	8,668
Beginning Balance at Mar. 31, 2023	513,077	35,164	(4,976)	546,631	(72,265)	8,523
Net earnings (loss)	36,199			35,912		287
Other comprehensive income, net	757		736			21
Acquisition of common stock	(1,303)				(1,303)
Transactions with noncontrolling interests and other	(179)	(16)				(163)
Ending Balance at Jun. 30, 2023	$ 548,551	$ 35,148	$ (4,240)	$ 582,543	$ (73,568)	$ 8,668