Summary of Significant Accounting Policies - EEGH - Narrative (Details) $ in Millions	12 Months Ended
	Dec. 31, 2023 USD ($) operatingSegment	Dec. 31, 2022 USD ($)
Disaggregation of Revenue [Line Items]
Unbilled revenue	$ 787	$ 828
Number of reportable segments | operatingSegment	8
EEGH
Disaggregation of Revenue [Line Items]
Unbilled revenue	$ 26	18
Contract assets	8	10
Contract liabilities	40	$ 80
Contract liabilities, revenue recognized	$ 52
Number of reportable segments | operatingSegment	1