Regulatory Capital and Other Regulatory Matters (Details) - USD ($) $ in Millions	Sep. 30, 2026	Dec. 31, 2025
Capital Requirements on Foreign Financial Institutions [Line Items]
Assets	$ 141,141	$ 140,477
International Regulated Bank and Finance Companies
Capital Requirements on Foreign Financial Institutions [Line Items]
Assets	$ 10,400	$ 9,300

Amount of asset recognized for present right to economic benefit.

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+ Details