CONSOLIDATED STATEMENT OF SHAREHOLDERS' 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)
BALANCE AS OF BEGINNING OF PERIOD (in shares) at Dec. 31, 2024		347
BALANCE AS OF BEGINNING OF PERIOD at Dec. 31, 2024	$ 21,962	$ 38	$ 9,986	$ 14,048	$ (2,017)	$ (122)	$ 29
BALANCE AS OF BEGINNING OF PERIOD (in treasury 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)
BALANCE AS OF END OF PERIOD (in shares) at Mar. 31, 2025		360
BALANCE AS OF END OF PERIOD at Mar. 31, 2025	$ 23,783	$ 39	11,340	14,544	$ (2,017)	(140)	17
BALANCE AS OF END OF PERIOD (in treasury shares) at Mar. 31, 2025					34
BALANCE AS OF BEGINNING OF PERIOD (in shares) at Dec. 31, 2025	361	361
BALANCE AS OF BEGINNING OF PERIOD at Dec. 31, 2025	$ 24,190	$ 39	11,436	14,857	$ (2,017)	(140)	15
BALANCE AS OF BEGINNING OF PERIOD (in treasury shares) at Dec. 31, 2025	34				34
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	$ 924			924
Common stock dividends	(320)			(320)
Issuance of common shares – public offering (shares)		7
Issuance of common shares - public offering	776		776
Issuance of common shares for stock plans	27	$ 1	35			(9)
Stock awards	2		2
Other comprehensive loss	(3)						(3)
BALANCE AS OF END OF PERIOD (in shares) at Mar. 31, 2026		368
BALANCE AS OF END OF PERIOD at Mar. 31, 2026	$ 25,596	$ 40	$ 12,249	$ 15,461	$ (2,017)	$ (149)	$ 12
BALANCE AS OF END OF PERIOD (in treasury shares) at Mar. 31, 2026	34				34