Derivative Financial Instruments - Schedule of OTC Derivatives Counterparty Credit Exposure by Counterparty Credit Rating (Details) $ in Millions	Mar. 31, 2024 USD ($) counter-party	Dec. 31, 2023 USD ($) counter-party
Credit Derivatives
Number of counter- parties | counter-party	2	0
Notional amount	$ 445	$ 0
Credit exposure	2	0
Exposure, net of collateral	$ 0	$ 0
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Credit Derivatives
Number of counter- parties | counter-party	2	0
Notional amount	$ 445	$ 0
Credit exposure	2	0
Exposure, net of collateral	$ 0	$ 0