Consolidated Statements of Changes in Equity (Unaudited) - EGTS - USD ($) $ in Millions	Total	EGTS	Common Stock EGTS	Additional Paid-in Capital EGTS	Retained Earnings EGTS	Accumulated Other Comprehensive Loss, Net EGTS
Balance (shares) at Dec. 31, 2022			60,101,000,000
Balance at Dec. 31, 2022		$ 2,600	$ 609	$ 1,275	$ 746	$ (30)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	$ 989	68			68
Other comprehensive income		1				1
Dividends declared		(9)			(9)
Contributions		7		7
Balance (shares) at Mar. 31, 2023			60,101,000,000
Balance at Mar. 31, 2023		$ 2,667	$ 609	1,282	805	(29)
Balance (shares) at Dec. 31, 2023	76,000,000	60,101	60,101,000,000
Balance at Dec. 31, 2023	$ 48,434	$ 2,688	$ 609	1,304	803	(28)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	$ 653	87			87
Other comprehensive income		0
Dividends declared		(167)			(167)
Contributions		$ 1		1
Balance (shares) at Mar. 31, 2024	76,000,000	60,101	60,101,000,000
Balance at Mar. 31, 2024	$ 48,959	$ 2,609	$ 609	$ 1,305	$ 723	$ (28)