SCHEDULE I - PARENT COMPANY FINANCIAL INFORMATION (Condensed Statements of Income) (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Revenues:
Total revenues	$ 106,374	$ 92,870	$ 83,064
Expenses:
Operating costs	13,188	12,671	10,121
Depreciation	850	749	640
Interest	493	401	326
Other income, net	137	68	(532)
Benefit for income taxes	836	762	485
Equity in net (losses) earnings	(63)	(4)	65
Net income	2,484	2,802	2,934
Parent Company
Revenues:
Management fees charged to operating subsidiaries	2,075	1,554	1,633
Investment and other (loss) income, net	42	(88)	(266)
Total revenues	2,117	1,466	1,367
Expenses:
Operating costs	2,016	1,700	1,404
Depreciation	656	581	488
Interest	489	400	313
Total expenses	3,161	2,681	2,205
Other income, net	(184)	0	(672)
Loss before income taxes and equity in net earnings of subsidiaries	(860)	(1,215)	(166)
Benefit for income taxes	(146)	(266)	(259)
(Loss) income before equity in net earnings of subsidiaries	(714)	(949)	93
Equity in net earnings of subsidiaries	3,203	3,755	2,761
Equity in net (losses) earnings	0	0	79
Net income	$ 2,489	$ 2,806	$ 2,933