Investments - Current Equity Securities (Details) - USD ($) $ in Millions	Jun. 30, 2024	Dec. 31, 2023
Equity Securities [Line Items]
Equity securities	$ 594	$ 229
Exchange traded funds
Equity Securities [Line Items]
Equity securities	481	106
Common equity securities
Equity Securities [Line Items]
Equity securities	35	45
Private equity securities
Equity Securities [Line Items]
Equity securities	$ 78	$ 78

Amount of investment in equity security measured at fair value with change in fair value recognized in net income (FV-NI), classified as current.

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 210
-SubTopic 10
-Name Accounting Standards Codification
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02(2))
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147480566/210-10-S99-1

Reference 2: http://www.xbrl.org/2003/role/exampleRef
-Topic 210
-SubTopic 10
-Name Accounting Standards Codification
-Section 45
-Paragraph 1
-Subparagraph (f)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147483467/210-10-45-1

Reference 3: http://www.xbrl.org/2003/role/disclosureRef
-Topic 825
-SubTopic 10
-Name Accounting Standards Codification
-Section 45
-Paragraph 1A
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482736/825-10-45-1A

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Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant