LEASES - Carrying Values of Leases (Details) - USD ($) $ in Millions	Dec. 31, 2021	Dec. 31, 2020
Leases [Abstract]
Operating lease assets	$ 96	$ 131
Finance lease assets	89	8
Lease right of use asset	185	139
Operating lease liabilities	108	138
Finance lease liabilities	83	8
Lease liability	$ 191	$ 146
Operating Lease, Right-of-Use Asset, Statement of Financial Position [Extensible Enumeration]	Other (including $76 and $54 from VIEs, respectively)	Other (including $76 and $54 from VIEs, respectively)
Finance Lease, Right-of-Use Asset, Statement of Financial Position [Extensible Enumeration]	Property and equipment, net	Property and equipment, net
Operating Lease, Liability, Statement of Financial Position [Extensible Enumeration]	Accounts Payable and Accrued Liabilities	Accounts Payable and Accrued Liabilities
Finance Lease, Liability, Statement of Financial Position [Extensible Enumeration]	Securitized debt net	Securitized debt net