Related Party Transactions - EEGH - Significant Transactions (Details) - EEGH - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Sales of natural gas and transmission and storage services
Related Party Transaction [Line Items]
Related party amounts of transaction	$ 5	$ 27	$ 32
Purchases of natural gas and transmission and storage services
Related Party Transaction [Line Items]
Related party amounts of transaction	0	4	5
Services provided by related parties
Related Party Transaction [Line Items]
Related party amounts of transaction	99	83	51
Services provided to related parties
Related Party Transaction [Line Items]
Related party amounts of transaction	$ 35	$ 38	$ 32