Derivative Financial Instruments - Gross and net amounts for OTC derivatives (Details) - USD ($) $ in Millions	Sep. 30, 2022	Dec. 31, 2021
Asset derivatives
Gross amount	$ 165	$ 77
Offset-Counter-party netting	(4)	(1)
Net amount on balance sheet	161	76
Liability derivatives
Gross amount	(37)	(14)
Offsets-Counter-party netting	60	23
Net amount on balance sheet	23	9
OTC derivatives
Asset derivatives
Gross amount	60	23
Offset-Counter-party netting	(64)	(24)
Offsets-Cash collateral received	5	2
Net amount on balance sheet	1	1
Securities collateral (received) pledged	0	0
Net amount	1	1
Liability derivatives
Gross amount	(16)	(10)
Offsets-Counter-party netting	64	24
Offsets-Cash collateral (received) pledged	(71)	(17)
Net amount on balance sheet	(23)	(3)
Securities collateral (received) pledged	0	0
Net amount	$ (23)	$ (3)