Asset Management Fees - Narrative (Details) - USD ($) $ in Millions	6 Months Ended	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
Disaggregation of Revenue [Line Items]
Total revenues		$ 872	$ 1,373	$ 723
Total expenses		446	$ 733	$ 536
Related Party
Disaggregation of Revenue [Line Items]
Total revenues	$ 5	10
Total expenses	$ 3	$ 6