OTHER ASSETS AND OTHER LIABILITIES AND DEFERRED REVENUE - Schedule of Other Liabilities and Deferred Revenue (Details) - USD ($) $ in Millions	Sep. 30, 2025	Dec. 31, 2024
Other Assets and Other Liabilities and Deferred Income [Abstract]
Interest payable	$ 1,144	$ 1,098
Unearned insurance premiums and fees	1,101	995
Income tax and related interest	162	131
Payroll and employee benefits	97	86
Operating lease liabilities	44	42
Other	480	275
Total other liabilities and deferred revenue	3,028	2,627
Related Party Transaction [Line Items]
Income tax and related interest	162	131
Affiliated Entity
Other Assets and Other Liabilities and Deferred Income [Abstract]
Income tax and related interest	7	9
Related Party Transaction [Line Items]
Income tax and related interest	$ 7	$ 9