Related Party Transactions (Service Agreements - Narrative) (Details) - USD ($) $ in Millions	3 Months Ended
Mar. 31, 2026	Mar. 31, 2025	Dec. 31, 2025
Related Party Transaction [Line Items]
Other expenses	$ 1,626	$ 1,313
Total Revenues	10,848	10,067
Other Liabilities	32,219		$ 31,164
Affiliated Entity [Member] \| Services Necessary To Conduct The Company's Activities
Related Party Transaction [Line Items]
Other expenses	771	778
Total Revenues	19	$ 20
Related Party
Related Party Transaction [Line Items]
Other Liabilities	$ 128		$ 72

Amount of liabilities classified as other.

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- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

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Amount of revenue recognized from goods sold, services rendered, insurance premiums, or other activities that constitute an earning process. Includes, but is not limited to, investment and interest income before deduction of interest expense when recognized as a component of revenue, and sales and trading gain (loss).

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