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, 2020			543,000,000
Beginning balance at Dec. 31, 2020	$ 7,237	$ 7,237	$ 54	$ 10,076	$ (5)	$ (2,888)	$ 0
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	335	335				335
Other comprehensive loss, net of tax	(2)	(2)
Stock Investment Plan and share-based benefit plans (in shares)			1,000,000
Stock Investment Plan and share-based benefit plans	2	2		2
Cash dividends declared on common stock	(212)	(212)		(212)
Ending balance (in shares) at Mar. 31, 2021			544,000,000
Ending balance at Mar. 31, 2021	7,360	7,360	$ 54	9,866	(7)	(2,553)	0
Beginning balance, (in shares) at Dec. 31, 2020			543,000,000
Beginning balance at Dec. 31, 2020	7,237	7,237	$ 54	10,076	(5)	(2,888)	0
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	856
Other comprehensive loss, net of tax	(6)
Ending balance (in shares) at Sep. 30, 2021			544,000,000
Ending balance at Sep. 30, 2021	7,479	7,479	$ 54	9,468	(11)	(2,032)	0
Beginning balance, (in shares) at Mar. 31, 2021			544,000,000
Beginning balance at Mar. 31, 2021	7,360	7,360	$ 54	9,866	(7)	(2,553)	0
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	58	58				58
Other comprehensive loss, net of tax	(2)	(2)			(2)
Stock Investment Plan and share-based benefit plans	14	14		14
Ending balance (in shares) at Jun. 30, 2021			544,000,000
Ending balance at Jun. 30, 2021	7,430	7,430	$ 54	9,880	(9)	(2,495)	0
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	463	463				463
Other comprehensive loss, net of tax	(2)	(2)			(2)
Stock Investment Plan and share-based benefit plans	13	13		13
Cash dividends declared on common stock	(425)	(425)		(425)
Ending balance (in shares) at Sep. 30, 2021			544,000,000
Ending balance at Sep. 30, 2021	$ 7,479	7,479	$ 54	9,468	(11)	(2,032)	0
Beginning balance, (in shares) at Dec. 31, 2021	570,261,104		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 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	570,261,104		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 loss, net of tax	$ 2
Ending balance (in shares) at Sep. 30, 2022	571,753,195		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 loss, net of tax	4	4			4
Stock Investment Plan and share-based benefit plans	25	25		25
FET minority interest sale, net of transaction costs (Note 1)	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 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 contributions from FET minority interest	9						9
Consolidated tax benefit allocation	$ 0	(4)		(4)			4
Ending balance (in shares) at Sep. 30, 2022	571,753,195		572,000,000
Ending balance at Sep. 30, 2022	$ 11,238	$ 10,774	$ 57	$ 11,526	$ (13)	$ (796)	$ 464