Derivative Financial Instruments - Narrative (Details)	12 Months Ended
	Dec. 31, 2024 USD ($) counterparty	Dec. 31, 2023 USD ($)
Derivative [Line Items]
Number of central counterparties | counterparty	2
Notional value	$ 920,617,000	$ 1,906,092,000
Derivative, fair value, amount offset against collateral, net	5,000,000	9,000,000
Gain (loss) to be reclassified within 12 months	(21,000,000)
Cash collateral held relative to derivative exposure	0	0
Cash collateral pledged	5,000,000	$ 9,000,000
CME
Derivative [Line Items]
Notional value	$ 850,000,000
Percent of total notional derivative contracts	92.30%
Amount of variation margin included as settlement	$ (22,000,000)
LCH
Derivative [Line Items]
Notional value	$ 71,000,000
Percent of total notional derivative contracts	7.70%
Amount of variation margin included as settlement	$ (1,000,000)