Derivative Financial Instruments - Schedule of Gross and Net Amounts for OTC Derivatives (Details) - OTC derivatives - USD ($) $ in Millions	Sep. 30, 2024	Dec. 31, 2023
Asset derivatives
Gross amount	$ 1	$ 3
Counter-party netting	(9)	(6)
Cash collateral (received) pledged	8	4
Net amount on balance sheet	0	1
Securities collateral (received) pledged	0	0
Net amount	0	1
Liability derivatives
Gross amount	(16)	(10)
Counter-party netting	9	6
Cash collateral (received) pledged	7	2
Net amount on balance sheet	0	(2)
Securities collateral (received) pledged	0	0
Net amount	$ 0	$ (2)