Consolidated Statements of Changes in Equity - EGTS - USD ($) $ in Millions	Total	EGTS	Common Stock EGTS	Additional Paid-in Capital EGTS	Retained Earnings EGTS	Accumulated Other Comprehensive Income (Loss) EGTS
Balance (shares) at Dec. 31, 2020			60,101,000,000
Balance at Dec. 31, 2020		$ 2,179	$ 609	$ 929	$ 641	$ 0
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income (loss)	$ 5,790	156			156
Other comprehensive income (loss)		(31)				(31)
Common stock dividends		(76)			(76)
Contributions		312		312
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)	$ 2,721	261			261
Other comprehensive income (loss)		1				1
Common stock dividends		(236)			(236)
Contributions		$ 34		34
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)	$ 3,020	238			238
Other comprehensive income (loss)		2				2
Common stock dividends		(181)			(181)
Contributions		$ 29		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)