SCHEDULE I - PARENT COMPANY FINANCIAL INFORMATION (Condensed Statements of Income) (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Revenues:
Total revenues	$ 92,870	$ 83,064	$ 77,155
Expenses:
Operating costs	12,671	10,121	10,052
Depreciation	749	640	528
Interest	401	326	283
Other expense (income), net	68	(532)	103
(Benefit) provision for income taxes	762	485	1,307
Equity in net (losses) earnings	(4)	65	74
Net income	2,802	2,934	3,367
Parent Company
Revenues:
Management fees charged to operating subsidiaries	1,554	1,633	2,216
Investment and other (loss) income, net	(88)	(266)	763
Total revenues	1,466	1,367	2,979
Expenses:
Operating costs	1,700	1,404	2,204
Depreciation	581	488	397
Interest	400	313	283
Total expenses	2,681	2,205	2,884
Other expense (income), net	0	(672)	60
(Loss) income before income taxes and equity in net earnings of subsidiaries	(1,215)	(166)	35
(Benefit) provision for income taxes	(266)	(259)	18
(Loss) income before equity in net earnings of subsidiaries	(949)	93	17
Equity in net earnings of subsidiaries	3,751	2,761	3,269
Equity in net (losses) earnings	0	79	81
Net income	$ 2,802	$ 2,933	$ 3,367