Summary of Significant Accounting Policies - EEGH - Narrative (Details) $ in Millions	12 Months Ended
	Dec. 31, 2024 USD ($) operatingSegment	Dec. 31, 2023 USD ($)
Disaggregation of Revenue [Line Items]
Unbilled revenue	$ 807	$ 787
Number of reportable segments | operatingSegment	8
EEGH
Disaggregation of Revenue [Line Items]
Unbilled revenue	$ 12	26
Contract assets	7	8
Contract liabilities	40	40
Contract liabilities, revenue recognized	$ 13	$ 52
Number of reportable segments | operatingSegment	1