Revenue and Expense - Additional Information (Details) - Parent Company [Member] - USD ($) $ in Billions	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Related Party Transaction [Line Items]
Management fee income	$ 2.6	$ 2.3	$ 2.3
Compensation expense	$ 2.6	$ 2.3	$ 2.3