Derivative Financial Instruments - Schedule of Gross and Net Amounts for OTC Derivatives (Details) - OTC derivatives - USD ($) $ in Millions	Mar. 31, 2024	Dec. 31, 2023
Asset derivatives
Gross amount	$ 5	$ 3
Counter-party netting	(4)	(6)
Cash collateral (received) pledged	0	4
Net amount on balance sheet	1	1
Securities collateral (received) pledged	0	0
Net amount	1	1
Liability derivatives
Gross amount	(4)	(10)
Counter-party netting	4	6
Cash collateral (received) pledged	(1)	2
Net amount on balance sheet	(1)	(2)
Securities collateral (received) pledged	0	0
Net amount	$ (1)	$ (2)