Investments - Schedule of Current Equity Securities (Details) - USD ($) $ in Millions	Jun. 30, 2026	Dec. 31, 2025
Equity Securities [Line Items]
Equity securities	$ 1,563	$ 740
Exchange traded funds
Equity Securities [Line Items]
Equity securities	1,481	650
Common equity securities
Equity Securities [Line Items]
Equity securities	35	35
Private equity securities
Equity Securities [Line Items]
Equity securities	$ 47	$ 55

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
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-Publisher FASB
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Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Topic 825
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-Paragraph 1A
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482736/825-10-45-1A

Reference 3: http://www.xbrl.org/2003/role/disclosureRef
-Topic 210
-SubTopic 10
-Name Accounting Standards Codification
-Section S99
-Paragraph 1
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-Publisher FASB
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Reference 4: http://www.xbrl.org/2003/role/exampleRef
-Topic 210
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