Derivatives - Offsetting Derivative Assets and Liabilities (Details) - USD ($) $ in Millions	Jun. 30, 2023	Dec. 31, 2022
Derivative [Line Items]
Asset Derivatives	$ 53	$ 62
Derivative assets	6	34
Gross Amounts of Recognized (Liabilities)	(88)	(15)
Derivative Liability	(41)	13
Other liabilities
Derivative [Line Items]
Derivative, Collateral, Obligation to Return Cash	(26)	21
Gross Amounts of Recognized (Liabilities)	(88)	(15)
Gross Amounts Offset in the Statement of Financial Position, liabilities	(73)	(7)
Derivative Liability	(41)	13
Derivative, Collateral, Obligation to Return Cash	26	(21)
Financial Collateral (Received)	(12)	(7)
Net amount, liabilities	(3)	(1)
Other investments
Derivative [Line Items]
Asset Derivatives	53	62
Gross Amounts Offset in the Statement of Financial Position, assets	51	60
Derivative assets	6	34
Derivative, Collateral, Obligation to Return Cash	4	32
Financial Collateral Pledged	0	0
Net Amount, assets	2	2
Derivative, Collateral, Obligation to Return Cash	$ (4)	$ (32)