INVESTMENTS IN UNCONSOLIDATED AFFILIATES (Details) $ in Millions	3 Months Ended	12 Months Ended
	Mar. 31, 2024 USD ($) Affiliate	Dec. 31, 2023 USD ($) Affiliate
Schedule Of Investments [Line Items]
Number of unconsolidated affiliates | Affiliate	2	2
Debt, net	$ 5,144	$ 3,049
Investments in unconsolidated affiliates	78	71
Variable Interest Entities
Schedule Of Investments [Line Items]
Investments in unconsolidated affiliates	2
Junior subordinated debentures outstanding	1,510	1,466
Junior subordinated debentures | Revolving Credit Facility
Schedule Of Investments [Line Items]
Junior subordinated debentures outstanding	70	0
Junior subordinated debentures | Revolving Credit Facility | Variable Interest Entities
Schedule Of Investments [Line Items]
Junior subordinated debentures outstanding	70
BRE Ace LLC and 1776 Holding, LLC
Schedule Of Investments [Line Items]
Debt, net	413	427
Two Unconsolidated Affiliates
Schedule Of Investments [Line Items]
Investments in unconsolidated affiliates	$ 76	$ 71