Investments - Investment Segment (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2024	Mar. 31, 2023	Dec. 31, 2023
Schedule of Investments
Investments	$ 3,315		$ 3,012
Securities sold, not yet purchased, at fair value	3,644		3,473
Total liabilities	14,439		14,785
Total assets	20,064		20,858
Net sales	2,244	$ 2,758
Cost of goods sold	1,987	2,260
Net loss	(26)	(358)
Net (loss) income attributable to investee shareholders	(38)	(270)
Investment Segment.
Schedule of Investments
Investments	3,203		2,898
Securities sold, not yet purchased, at fair value	3,644		3,473
Portion of unrealized (losses) gains that relates to equity and debt securities still held	(339)	$ (208)
Total liabilities	4,643		4,785
Total assets	9,940		10,145
Investment Segment. | Equity securities
Schedule of Investments
Equity securities	3,143		2,611
Securities sold, not yet purchased, at fair value	3,469		3,288
Investment Segment. | Communication
Schedule of Investments
Equity securities	12
Investment Segment. | Consumer, non-cyclical
Schedule of Investments
Equity securities	281		260
Securities sold, not yet purchased, at fair value	22		41
Investment Segment. | Consumer, cyclical
Schedule of Investments
Securities sold, not yet purchased, at fair value			3
Investment Segment. | Energy
Schedule of Investments
Equity securities	781		708
Securities sold, not yet purchased, at fair value	2,536		2,146
Investment Segment. | Financial
Schedule of Investments
Debt Securities			158
Investment Segment. | Utilities
Schedule of Investments
Equity securities	943		1,012
Securities sold, not yet purchased, at fair value	436		610
Investment Segment. | Healthcares
Schedule of Investments
Equity securities	543		440
Investment Segment. | Technology
Schedule of Investments
Equity securities	129		139
Investment Segment. | Materials
Schedule of Investments
Equity securities	322		52
Securities sold, not yet purchased, at fair value	309		350
Investment Segment. | Industrial
Schedule of Investments
Equity securities	132
Securities sold, not yet purchased, at fair value	166		138
Investment Segment. | Debt securities
Schedule of Investments
Debt Securities	60		287
Investment Segment. | Real Estate
Schedule of Investments
Debt Securities	42		44
Investment Segment. | Communications
Schedule of Investments
Debt Securities	18		85
Investment Segment. | Materials
Schedule of Investments
Securities sold, not yet purchased, at fair value	$ 175		$ 185