Derivative Financial Instruments - Offsetting Assets and Liabilities (Details) - USD ($)	Jun. 30, 2024	Dec. 31, 2023
Derivative Instruments and Hedging Activities Disclosure [Abstract]
Gross amount recognized, Assets	$ 316,000,000	$ 311,000,000
Gross amount recognized, Liabilities	316,000,000	370,000,000
Counterparty netting, Assets	(256,000,000)	(216,000,000)
Counterparty netting, Liabilities	(256,000,000)	(216,000,000)
Cash collateral netting, Assets	(50,000,000)	(76,000,000)
Cash collateral netting, Liabilities	(56,000,000)	(150,000,000)
Securities collateral netting, Assets	(4,000,000)	(8,000,000)
Securities collateral netting, Liabilities	(3,000,000)	(3,000,000)
Net receivables/payables, Assets	6,000,000	11,000,000
Net receivables/payables, Liabilities	1,000,000	1,000,000
Excluded asset exchange traded contract	0	0
Excluded liability exchange traded contracts	$ 0	$ 1,000,000

Amount of obligation to return cash collateral under master netting arrangements offset against derivative assets.

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-Name Accounting Standards Codification
-Section 45
-Paragraph 5
-SubTopic 10
-Topic 815
-Publisher FASB
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