CONSOLIDATED STATEMENTS OF COMMON STOCKHOLDERS' EQUITY (UNAUDITED) - USD ($) $ in Millions	Total	Common Stock	Additional Paid In Capital	Retained Earnings	Accumulated Other Comprehensive Loss
Balance (in shares) at Dec. 31, 2021		544,025,269
Beginning balance at Dec. 31, 2021	$ 15,612	$ 1,360	$ 7,803	$ 6,572	$ (123)
Increase (Decrease) in Stockholders' Equity
Net income	1,357			1,357
Other comprehensive income	32				32
Dividends declared on common stock (USD per share)		$ 1.4625
Dividends declared on common stock	(798)			(798)
Issuances of common stock (in shares)		2,980,807
Issuances of common stock	185	$ 8	177
Share-based compensation	(4)		(1)	(3)
Balance (in shares) at Sep. 30, 2022		547,006,076
Ending balance at Sep. 30, 2022	16,384	$ 1,368	7,979	7,128	(91)
Balance (in shares) at Jun. 30, 2022		546,807,793
Beginning balance at Jun. 30, 2022	15,971	$ 1,367	7,960	6,747	(103)
Increase (Decrease) in Stockholders' Equity
Net income	649			649
Other comprehensive income	12				12
Dividends declared on common stock (USD per share)		$ 0.4875
Dividends declared on common stock	(267)			(267)
Issuances of common stock (in shares)		198,283
Issuances of common stock	14	$ 1	13
Share-based compensation	5		6	(1)
Balance (in shares) at Sep. 30, 2022		547,006,076
Ending balance at Sep. 30, 2022	$ 16,384	$ 1,368	7,979	7,128	(91)
Balance (in shares) at Dec. 31, 2022	549,578,018	549,578,018
Beginning balance at Dec. 31, 2022	$ 16,675	$ 1,374	8,155	7,239	(93)
Increase (Decrease) in Stockholders' Equity
Net income	1,362			1,362
Other comprehensive income	15				15
Dividends declared on common stock (USD per share)		$ 1.56
Dividends declared on common stock	(859)			(859)
Issuances of common stock (in shares)		2,084,785
Issuances of common stock	113	$ 5	108
Share-based compensation	$ 3		6	(3)
Balance (in shares) at Sep. 30, 2023	551,662,803	551,662,803
Ending balance at Sep. 30, 2023	$ 17,309	$ 1,379	8,269	7,739	(78)
Balance (in shares) at Jun. 30, 2023		551,375,255
Beginning balance at Jun. 30, 2023	16,914	$ 1,378	8,247	7,371	(82)
Increase (Decrease) in Stockholders' Equity
Net income	656			656
Other comprehensive income	4				4
Dividends declared on common stock (USD per share)		$ 0.52
Dividends declared on common stock	(287)			(287)
Issuances of common stock (in shares)		287,548
Issuances of common stock	18	$ 1	17
Share-based compensation	$ 4		5	(1)
Balance (in shares) at Sep. 30, 2023	551,662,803	551,662,803
Ending balance at Sep. 30, 2023	$ 17,309	$ 1,379	$ 8,269	$ 7,739	$ (78)