Schedule I Condensed Statement of Comprehensive Income (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Revenues:
Investment and other income	$ 4,089	$ 2,030	$ 2,324
Total revenues	371,622	324,162	287,597
Operating costs:
Interest expense	3,246	2,092	1,660
Total operating costs	339,264	295,727	263,627
Benefit for income taxes	5,968	5,704	4,578
Net earnings	22,381	20,120	17,285
Other comprehensive income (loss)	1,366	(3,009)	(1,570)
Comprehensive income	23,747	17,111	15,715
Parent Company [Member]
Revenues:
Investment and other income	312	255	494
Total revenues	312	255	494
Operating costs:
Operating costs	35	121	40
Interest expense	3,469	2,110	1,583
Total operating costs	3,504	2,231	1,623
Loss before income taxes	(3,192)	(1,976)	(1,129)
Benefit for income taxes	654	429	231
Loss of parent company	(2,538)	(1,547)	(898)
Equity in undistributed income of subsidiaries	24,919	21,667	18,183
Net earnings	22,381	20,120	17,285
Other comprehensive income (loss)	1,366	(3,009)	(1,570)
Comprehensive income	$ 23,747	$ 17,111	$ 15,715