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) Income, Net EGTS
Balance (shares) at Dec. 31, 2021			60,101,000,000
Balance at Dec. 31, 2021		$ 2,540	$ 609	$ 1,241	$ 721	$ (31)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income (loss)	$ 2,768	126			126
Other comprehensive income (loss)		1				1
Dividends declared		(97)			(97)
Contributions		13		13
Balance (shares) at Jun. 30, 2022			60,101,000,000
Balance at Jun. 30, 2022		2,583	$ 609	1,254	750	(30)
Balance (shares) at Mar. 31, 2022			60,101,000,000
Balance at Mar. 31, 2022		2,596	$ 609	1,241	776	(30)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income (loss)	$ 2,897	71			71
Other comprehensive income (loss)		0
Dividends declared		(97)			(97)
Contributions		13		13
Balance (shares) at Jun. 30, 2022			60,101,000,000
Balance at Jun. 30, 2022		$ 2,583	$ 609	1,254	750	(30)
Balance (shares) at Dec. 31, 2022	76,000,000	60,101	60,101,000,000
Balance at Dec. 31, 2022	$ 46,832	$ 2,600	$ 609	1,275	746	(30)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income (loss)	$ 2,064	127			127
Other comprehensive income (loss)		1				1
Dividends declared		(130)			(130)
Contributions		$ 25		25
Balance (shares) at Jun. 30, 2023	76,000,000	60,101	60,101,000,000
Balance at Jun. 30, 2023	$ 49,183	$ 2,623	$ 609	1,300	743	(29)
Balance (shares) at Mar. 31, 2023			60,101,000,000
Balance at Mar. 31, 2023		2,667	$ 609	1,282	805	(29)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income (loss)	$ 1,075	59			59
Other comprehensive income (loss)		0
Dividends declared		(121)			(121)
Contributions		$ 18		18
Balance (shares) at Jun. 30, 2023	76,000,000	60,101	60,101,000,000
Balance at Jun. 30, 2023	$ 49,183	$ 2,623	$ 609	$ 1,300	$ 743	$ (29)