Regulatory Capital and Other Regulatory Matters (Details) $ in Millions	Dec. 31, 2024 USD ($)	Dec. 31, 2023 USD ($)
Capital Requirements on Foreign Financial Institutions [Line Items]
Assets	$ 141,030	$ 132,011
Brazil
Capital Requirements on Foreign Financial Institutions [Line Items]
Capital ratio (as a percent)	0.217
International Regulated Bank and Finance Companies
Capital Requirements on Foreign Financial Institutions [Line Items]
Assets	$ 7,500	$ 7,700
Minimum | Brazil
Capital Requirements on Foreign Financial Institutions [Line Items]
Capital requirement (as a percent)	0.105