Fair Value Measurements - Schedule of Fair Value of Direct and Indirect Investments, Related Unfunded Commitments and Financial Support Provided (Details) - Principal Investments - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2025	Sep. 30, 2024	Sep. 30, 2025	Sep. 30, 2024
Fair Value, Investments, Entities that Calculate Net Asset Value Per Share [Line Items]
Fair Value	$ 11		$ 11
Unfunded Commitments	1		1
Funded Commitments	0	$ 0	0	$ 0
Funded Other	0	0	0	0
Indirect investments (measured at NAV)
Fair Value, Investments, Entities that Calculate Net Asset Value Per Share [Line Items]
Fair Value	11		11
Unfunded Commitments	1		1
Funded Commitments	0	0	0	0
Funded Other	$ 0	$ 0	$ 0	$ 0