Derivative Financial Instruments and Off-balance Sheet Financial Instruments - Schedule of Gross and Net Amounts for OTC Derivatives (Details) - USD ($) $ in Millions	Dec. 31, 2023	Dec. 31, 2022
Asset derivatives
Gross amount	$ 123	$ 121
Counter- party netting	(5)	(14)
Net amount on balance sheet	118	107
Liability derivatives
Gross amount	(7)	(12)
Counter- party netting	1	8
Net amount on balance sheet	(6)	(4)
OTC derivatives
Asset derivatives
Gross amount	3	23
Counter- party netting	(6)	(22)
Cash collateral (received) pledged	4	0
Net amount on balance sheet	1	1
Securities collateral (received) pledged	0	0
Net amount	1	1
Liability derivatives
Gross amount	(10)	(22)
Counter- party netting	6	22
Cash collateral (received) pledged	2	(1)
Net amount on balance sheet	(2)	(1)
Securities collateral (received) pledged	0	0
Net amount	$ (2)	$ (1)