Accrued Expenses and Other Liabilities (Details) - USD ($) $ in Millions	Jun. 30, 2025	Dec. 31, 2024	Jun. 30, 2024	Dec. 31, 2023
Accounts Payable and Accrued Liabilities [Abstract]
Unfunded commitments for proportional amortization investments	$ 963	$ 1,019
Accounts payable	550	505
Employee compensation and benefits	309	424
Reserves for insurance losses and loss adjustment expenses	254	189	$ 203	$ 140
Deferred revenue	131	122
Operating lease liabilities	98	111
Other liabilities	484	444
Total accrued expenses and other liabilities	$ 2,789	$ 2,814