SCHEDULE I - PARENT COMPANY FINANCIAL INFORMATION (Condensed Statements of Income) (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Revenues:
Total revenues	$ 83,064	$ 77,155	$ 64,888
Expenses:
Operating costs	10,121	10,052	7,381
Depreciation	640	528	505
Interest	326	283	242
Other (income) expense, net	(532)	103	(506)
(Benefit) provision for income taxes	485	1,307	763
Equity in net earnings	65	74	14
Net income (loss)	2,933	3,367	2,707
Parent Company
Revenues:
Management fees charged to operating subsidiaries	1,633	2,216	1,789
Investment and other (loss) income, net	(266)	763	28
Total revenues	1,367	2,979	1,817
Expenses:
Operating costs	1,404	2,204	1,577
Depreciation	488	397	387
Interest	313	283	242
Total operating expenses	2,205	2,884	2,206
Other (income) expense, net	(672)	60	(506)
(Loss) income before income taxes and equity in net earnings of subsidiaries	(166)	35	117
(Benefit) provision for income taxes	(259)	18	27
Income before equity in net earnings of subsidiaries	93	17	90
Equity in net earnings of subsidiaries	2,761	3,269	2,603
Equity in net earnings	79	81	14
Net income (loss)	$ 2,933	$ 3,367	$ 2,707