Investments - Investment Segment (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021	Sep. 30, 2023
Schedule of Investments
Securities sold, not yet purchased, at fair value	$ 3,473	$ 6,495
Fair value of equity method investment under fair value option		500
Unrealized gain on equity method investments under fair value option	60	(230)
Total liabilities	14,785	18,356
Total assets	20,858	27,914
Net sales	11,077	13,378	$ 10,304
Cost of goods sold	9,327	11,689	9,485
Net loss	(1,012)	(25)	(500)
Net (loss) income attributable to investee shareholders	(684)	(183)	(518)
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Schedule of Investments
Non-controlling interests		10
Equity attributable to investee shareholders		3,343
Total liabilities		7,966
Total assets		11,543
Net sales		7,107
Cost of goods sold		7,435
Net loss		(322)
Net (loss) income attributable to investee shareholders		(322)
Investment Segment.
Schedule of Investments
Debt Securities	287	2,100
Securities sold, not yet purchased, at fair value	3,473	6,495
Portion of unrealized (losses) gains that relates to equity and debt securities still held	(302)	(1,544)	$ 1,153
Total liabilities	4,785	8,084
Total assets	10,145	17,234
Net sales	0
Cost of goods sold	0
Investment Segment. | Equity securities
Schedule of Investments
Equity securities	2,611	4,619
Securities sold, not yet purchased, at fair value	3,288	6,326
Investment Segment. | Communication
Schedule of Investments
Equity securities		199
Debt Securities	85	11
Investment Segment. | Consumer, non-cyclical
Schedule of Investments
Securities sold, not yet purchased, at fair value	41	1,006
Investment Segment. | Consumer, cyclical
Schedule of Investments
Equity securities	260	692
Securities sold, not yet purchased, at fair value	3	352
Investment Segment. | Energy
Schedule of Investments
Equity securities	708	909
Securities sold, not yet purchased, at fair value	2,146	2,690
Investment Segment. | Financial
Schedule of Investments
Debt Securities	158	1,958
Investment Segment. | Utilities
Schedule of Investments
Equity securities	1,012	1,205
Securities sold, not yet purchased, at fair value	610	813
Investment Segment. | Healthcares
Schedule of Investments
Equity securities	440	320
Securities sold, not yet purchased, at fair value		387
Investment Segment. | Technology
Schedule of Investments
Equity securities	139	655
Investment Segment. | Materials
Schedule of Investments
Equity securities	52	153
Securities sold, not yet purchased, at fair value	350	598
Investment Segment. | Industrial
Schedule of Investments
Equity securities		486
Securities sold, not yet purchased, at fair value	138	480
Investment Segment. | Debt securities
Schedule of Investments
Debt Securities	2,898	6,719
Securities sold, not yet purchased, at fair value	185	169
Investment Segment. | Real Estate
Schedule of Investments
Debt Securities	44	131
Investment Segment. | Materials
Schedule of Investments
Securities sold, not yet purchased, at fair value	$ 185	169
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Schedule of Investments
Ownership percentage in equity method investment	0.00%			22.00%
Fair value of equity method investment under fair value option		500
Unrealized gain on equity method investments under fair value option	$ 60	$ (230)