Condensed Statements of Consolidated Changes in Equity (Unaudited) - USD ($) $ in Millions	Total	Cumulative Preferred Stock	Common Stock	Additional Paid-in-Capital	Retained Earnings	Accumulated Other Comprehensive Loss
Balance, beginning of period (in shares) at Dec. 31, 2022		1,000,000
Balance, beginning of period at Dec. 31, 2022		$ 790	$ 6	$ 8,568	$ 709	$ (31)
Balance, beginning of period (in shares) at Dec. 31, 2022			630,000,000
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Issuances of common stock (in shares)			0
Issuances of Common Stock, net of issuance costs			$ 0	0
Issuances related to benefit and investment plans (in shares)			1,000,000
Issuances related to benefit and investment plans			$ 0	2
Net income	$ 443				443
Common Stock dividends declared (see Note 18)					(120)
Other comprehensive income (loss)						(1)
Balance, end of period (in shares) at Jun. 30, 2023		1,000,000
Balance, end of period at Jun. 30, 2023	10,366	$ 790	$ 6	8,570	1,032	(32)
Balance, end of period (in shares) at Jun. 30, 2023			631,000,000
Balance, beginning of period (in shares) at Mar. 31, 2023		1,000,000
Balance, beginning of period at Mar. 31, 2023		$ 790	$ 6	8,558	1,034	(32)
Balance, beginning of period (in shares) at Mar. 31, 2023			631,000,000
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Issuances of common stock (in shares)			0
Issuances of Common Stock, net of issuance costs			$ 0	0
Issuances related to benefit and investment plans (in shares)			0
Issuances related to benefit and investment plans			$ 0	12
Net income	118				118
Common Stock dividends declared (see Note 18)					(120)
Other comprehensive income (loss)						0
Balance, end of period (in shares) at Jun. 30, 2023		1,000,000
Balance, end of period at Jun. 30, 2023	10,366	$ 790	$ 6	8,570	1,032	(32)
Balance, end of period (in shares) at Jun. 30, 2023			631,000,000
Balance, beginning of period (in shares) at Dec. 31, 2023		0
Balance, beginning of period at Dec. 31, 2023	$ 9,667	$ 0	$ 6	8,604	1,092	(35)
Balance, beginning of period (in shares) at Dec. 31, 2023	631,225,829		631,000,000
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Issuances of common stock (in shares)			9,000,000
Issuances of Common Stock, net of issuance costs			$ 0	247
Issuances related to benefit and investment plans (in shares)			2,000,000
Issuances related to benefit and investment plans			$ 0	(15)
Net income	$ 578				578
Common Stock dividends declared (see Note 18)					(128)
Other comprehensive income (loss)						5
Balance, end of period (in shares) at Jun. 30, 2024		0
Balance, end of period at Jun. 30, 2024	$ 10,354	$ 0	$ 6	8,836	1,542	(30)
Balance, end of period (in shares) at Jun. 30, 2024	641,953,090		642,000,000
Balance, beginning of period (in shares) at Mar. 31, 2024		0
Balance, beginning of period at Mar. 31, 2024		$ 0	$ 6	8,583	1,442	(33)
Balance, beginning of period (in shares) at Mar. 31, 2024			633,000,000
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Issuances of common stock (in shares)			9,000,000
Issuances of Common Stock, net of issuance costs			$ 0	244
Issuances related to benefit and investment plans (in shares)			0
Issuances related to benefit and investment plans			$ 0	9
Net income	$ 228				228
Common Stock dividends declared (see Note 18)					(128)
Other comprehensive income (loss)						3
Balance, end of period (in shares) at Jun. 30, 2024		0
Balance, end of period at Jun. 30, 2024	$ 10,354	$ 0	$ 6	$ 8,836	$ 1,542	$ (30)
Balance, end of period (in shares) at Jun. 30, 2024	641,953,090		642,000,000