Derivative Financial Instruments - Schedule of Gross and Net Amounts for OTC Derivatives (Details) - OTC derivatives - USD ($) $ in Millions	Sep. 30, 2023	Dec. 31, 2022
Asset derivatives
Gross amount	$ 20	$ 23
Counter-party netting	(17)	(22)
Cash collateral (received) pledged	1	0
Net amount on balance sheet	4	1
Securities collateral (received) pledged	0	0
Net amount	4	1
Liability derivatives
Gross amount	(5)	(22)
Counter-party netting	17	22
Cash collateral (received) pledged	(13)	(1)
Net amount on balance sheet	(1)	(1)
Securities collateral (received) pledged	0	0
Net amount	$ (1)	$ (1)