Consolidated Statements of Equity - USD ($) $ in Millions	Total	Total Common Stockholders’ Equity	Common Stock	OPIC	AOCI	Accumulated Deficit	NCI
Beginning balance, (in shares) at Dec. 31, 2021			570,000,000
Beginning balance at Dec. 31, 2021	$ 8,675	$ 8,675	$ 57	$ 10,238	$ (15)	$ (1,605)	$ 0
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	288	288				288
Other comprehensive income (loss), net of tax	(1)	(1)			(1)
Stock Investment Plan and share-based benefit plans (in shares)			1,000,000
Stock Investment Plan and share-based benefit plans	20	20		20
Cash dividends declared on common stock	(223)	(223)		(223)
Other	(4)	(4)		(4)
Ending balance (in shares) at Mar. 31, 2022			571,000,000
Ending balance at Mar. 31, 2022	8,755	8,755	$ 57	10,031	(16)	(1,317)	0
Beginning balance, (in shares) at Dec. 31, 2021			570,000,000
Beginning balance at Dec. 31, 2021	8,675	8,675	$ 57	10,238	(15)	(1,605)	0
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	824
Other comprehensive income (loss), net of tax	2
Ending balance (in shares) at Sep. 30, 2022			572,000,000
Ending balance at Sep. 30, 2022	11,238	10,774	$ 57	11,526	(13)	(796)	464
Beginning balance, (in shares) at Mar. 31, 2022			571,000,000
Beginning balance at Mar. 31, 2022	8,755	8,755	$ 57	10,031	(16)	(1,317)	0
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	192	187				187	5
Other comprehensive income (loss), net of tax	4	4			4
Stock Investment Plan and share-based benefit plans	25	25
FET minority interest sale, net of transaction costs	2,338	1,887		1,887			451
Ending balance (in shares) at Jun. 30, 2022			571,000,000
Ending balance at Jun. 30, 2022	11,314	10,858	$ 57	11,943	(12)	(1,130)	456
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	344	334				334	10
Other comprehensive income (loss), net of tax	(1)	(1)			(1)
Stock Investment Plan and share-based benefit plans (in shares)			1,000,000
Stock Investment Plan and share-based benefit plans	33	33		33
Cash dividends declared on common stock	(446)	(446)		(446)
Distributions to FET minority interest	(15)						(15)
Capital contribution from FET minority interest	9						9
Consolidated tax benefit allocation	0	(4)		(4)			4
Ending balance (in shares) at Sep. 30, 2022			572,000,000
Ending balance at Sep. 30, 2022	$ 11,238	10,774	$ 57	11,526	(13)	(796)	464
Beginning balance, (in shares) at Dec. 31, 2022	572,130,932		572,000,000
Beginning balance at Dec. 31, 2022	$ 10,643	10,166	$ 57	11,322	(14)	(1,199)	477
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	310	292				292	18
Other comprehensive income (loss), net of tax	(1)	(1)			(1)
Stock Investment Plan and share-based benefit plans (in shares)			1,000,000
Stock Investment Plan and share-based benefit plans	19	19		19
Cash dividends declared on common stock	(223)	(223)		(223)
Distributions to FET minority interest	(17)						(17)
Ending balance (in shares) at Mar. 31, 2023			573,000,000
Ending balance at Mar. 31, 2023	$ 10,731	10,253	$ 57	11,118	(15)	(907)	478
Beginning balance, (in shares) at Dec. 31, 2022	572,130,932		572,000,000
Beginning balance at Dec. 31, 2022	$ 10,643	10,166	$ 57	11,322	(14)	(1,199)	477
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	984
Other comprehensive income (loss), net of tax	$ (2)
Ending balance (in shares) at Sep. 30, 2023	573,814,823		574,000,000
Ending balance at Sep. 30, 2023	$ 10,945	10,474	$ 57	10,705	(16)	(272)	471
Beginning balance, (in shares) at Mar. 31, 2023			573,000,000
Beginning balance at Mar. 31, 2023	10,731	10,253	$ 57	11,118	(15)	(907)	478
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	254	235				235	19
Stock Investment Plan and share-based benefit plans	22	22		22
Distributions to FET minority interest	(36)						(36)
Ending balance (in shares) at Jun. 30, 2023			573,000,000
Ending balance at Jun. 30, 2023	10,971	10,510	$ 57	11,140	(15)	(672)	461
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	420	400				400	20
Other comprehensive income (loss), net of tax	(1)	(1)			(1)
Stock Investment Plan and share-based benefit plans (in shares)			1,000,000
Stock Investment Plan and share-based benefit plans	24	24		24
Cash dividends declared on common stock	(459)	(459)		(459)
Distributions to FET minority interest	$ (10)						(10)
Ending balance (in shares) at Sep. 30, 2023	573,814,823		574,000,000
Ending balance at Sep. 30, 2023	$ 10,945	$ 10,474	$ 57	$ 10,705	$ (16)	$ (272)	$ 471