CONSOLIDATED STATEMENT OF EQUITY (UNAUDITED) - USD ($) shares in Millions, $ in Millions	Total	Common Stock	Additional Paid-In Capital	Retained Earnings	Treasury Stock	Capital Stock Expense	Accumulated Other Comprehensive Income (Loss)
Beginning balance (shares) at Dec. 31, 2023		345
Beginning balance at Dec. 31, 2023	$ 21,158	$ 37	$ 9,861	$ 13,377	$ (2,017)	$ (122)	$ 22
Beginning balance (shares) at Dec. 31, 2023					34
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	720			720
Common stock dividends	(287)			(287)
Issuance of common shares for stock plans (shares)		1
Issuance of common shares for stock plans	28	$ 1	27
Other comprehensive loss	(4)						(4)
Ending balance (shares) at Mar. 31, 2024		346
Ending balance at Mar. 31, 2024	21,615	$ 38	9,888	13,810	$ (2,017)	(122)	18
Ending balance (shares) at Mar. 31, 2024					34
Beginning balance (shares) at Dec. 31, 2024		347
Beginning balance at Dec. 31, 2024	21,962	$ 38	9,986	14,048	$ (2,017)	(122)	29
Beginning balance (shares) at Dec. 31, 2024					34
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	791			791
Common stock dividends	(295)			(295)
Issuance of common shares – public offering (shares)		13
Issuance of common shares - public offering	1,308		1,326			(18)
Issuance of common shares for stock plans	29	$ 1	28
Other comprehensive loss	(12)						(12)
Ending balance (shares) at Mar. 31, 2025		360
Ending balance at Mar. 31, 2025	$ 23,783	$ 39	$ 11,340	$ 14,544	$ (2,017)	$ (140)	$ 17
Ending balance (shares) at Mar. 31, 2025					34