Derivatives - Offsetting Derivative Assets and Liabilities (Details) - USD ($) $ in Millions	Mar. 31, 2023	Dec. 31, 2022
Derivative [Line Items]
Asset Derivatives	$ 60	$ 62
Derivative assets	50	34
Gross Amounts of Recognized (Liabilities)	(41)	(15)
Derivative Liability	(31)	13
Other liabilities
Derivative [Line Items]
Derivative, Collateral, Obligation to Return Cash	(20)	21
Gross Amounts of Recognized (Liabilities)	(41)	(15)
Gross Amounts Offset in the Statement of Financial Position, liabilities	(30)	(7)
Derivative Liability	(31)	13
Derivative, Collateral, Obligation to Return Cash	20	(21)
Financial Collateral (Received)	(10)	(7)
Net amount, liabilities	(1)	(1)
Other investments
Derivative [Line Items]
Asset Derivatives	60	62
Gross Amounts Offset in the Statement of Financial Position, assets	55	60
Derivative assets	50	34
Derivative, Collateral, Obligation to Return Cash	45	32
Financial Collateral Pledged	0	0
Net Amount, assets	5	2
Derivative, Collateral, Obligation to Return Cash	$ (45)	$ (32)