Fair Value - Gross Transfers Into (Out of) Level 3 (Details) - Recurring - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Net transfers out of Level 3	$ (67)	$ (50)
Level 3
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Gross transfers into Level 3	0	0
Gross transfers out of Level 3	(67)	(50)
Net transfers out of Level 3	$ (67)	$ (50)