Loans Receivable and Allowance for Credit Losses - Allowance for Credit Losses Narrative (Details) $ in Millions	3 Months Ended
	Mar. 31, 2026 USD ($) quarter	Dec. 31, 2025 USD ($)
Financing Receivable Allowance for Credit Losses
Life time loss rate, period span | quarter	8
Allowance for credit losses	$ 883	$ 858
Increase in allowance for credit losses	25
Commercial Lending
Financing Receivable Allowance for Credit Losses
Collateral dependent loan	58	69
Consumer Lending
Financing Receivable Allowance for Credit Losses
Collateral dependent loan	$ 17	$ 10