Consolidated Statement of Equity - USD ($) $ in Millions	Total	Common Stock	Additional Paid-In Capital	Retained Earnings	Treasury Stock	Capital Stock Expense	Accumulated Other Comprehensive Income/(Loss)	Noncontrolling Interest
BALANCE AS OF BEGINNING OF PERIOD (in shares) at Dec. 31, 2019		333,000,000
BALANCE AS OF BEGINNING OF PERIOD at Dec. 31, 2019	$ 18,213	$ 35	$ 8,054	$ 11,100	$ (1,038)	$ (110)	$ (19)	$ 191
TREASURY STOCK, BALANCE AS OF BEGINNING OF PERIOD (in shares) at Dec. 31, 2019					23,000,000
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net Income	1,144			1,101				43
Common stock dividends	(1,023)			(1,023)
Issuance of common shares - public offering (in shares)		9,000,000
Issuance of common shares - public offering	640	$ 1	641			(2)
Issuance of common shares for stock plans	113		113
Other comprehensive income	(6)						(6)
Distributions to noncontrolling interests	(16)							(16)
BALANCE AS OF END OF PERIOD (in shares) at Dec. 31, 2020		342,000,000
BALANCE AS OF END OF PERIOD at Dec. 31, 2020	19,065	$ 36	8,808	11,178	$ (1,038)	(112)	(25)	218
TREASURY STOCK, BALANCE AS OF END OF PERIOD (in shares) at Dec. 31, 2020					23,000,000
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net Income	1,193			1,346				(153)
Common stock dividends	(1,079)			(1,079)
Issuance of common shares - public offering (in shares)		10,000,000
Issuance of common shares - public offering	766	$ 1	775			(10)
Issuance of common shares for stock plans (in shares)		2,000,000
Issuance of common shares for stock plans	127		127
Other comprehensive income	30						30
Distributions to noncontrolling interests	(23)							(23)
Net proceeds from sale of equity interest	$ 257							257
BALANCE AS OF END OF PERIOD (in shares) at Dec. 31, 2021	353,983,712	354,000,000
BALANCE AS OF END OF PERIOD at Dec. 31, 2021	$ 20,336	$ 37	9,710	11,445	$ (1,038)	(122)	5	299
TREASURY STOCK, BALANCE AS OF END OF PERIOD (in shares) at Dec. 31, 2021					23,000,000
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net Income	1,600			1,660				(60)
Common stock dividends	(1,120)			(1,120)
Issuance of common shares - public offering	0
Issuance of common shares for stock plans (in shares)		1,000,000
Issuance of common shares for stock plans	93		93
Other comprehensive income	17						17
Distributions to noncontrolling interests	$ (37)							(37)
BALANCE AS OF END OF PERIOD (in shares) at Dec. 31, 2022	354,962,058	355,000,000
BALANCE AS OF END OF PERIOD at Dec. 31, 2022	$ 20,889	$ 37	$ 9,803	$ 11,985	$ (1,038)	$ (122)	$ 22	$ 202
TREASURY STOCK, BALANCE AS OF END OF PERIOD (in shares) at Dec. 31, 2022					23,000,000