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Investments in Equity Securities (Details) - USD ($) $ in Millions	9 Months Ended
	Sep. 30, 2025	Dec. 31, 2024
Debt and Equity Securities, FV-NI [Line Items]
Carrying amount of investments	$ 33	$ 36
Assets	2,898	2,800
Liabilities	1,678	1,869
Variable Interest Entity, Primary Beneficiary
Debt and Equity Securities, FV-NI [Line Items]
Assets	196	193
Liabilities	$ 88	$ 87
Company Limited | Variable Interest Entity, Primary Beneficiary
Debt and Equity Securities, FV-NI [Line Items]
Equity ownership percentage	70.00%

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