CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2025	Dec. 31, 2024	Dec. 31, 2023
Statement of Comprehensive Income [Abstract]
Net income	$ 2,703	$ 2,512	$ 2,256
Other Comprehensive Income (Loss)
Pension and other postretirement benefit plans obligations (net of taxes of $4, $3, and $6, respectively)	(11)	(7)	(16)
Net unrealized gain (losses) on available-for-sale securities (net of taxes of $2, $0, and $3, respectively)	5	1	8
Total other comprehensive income (loss)	(6)	(6)	(8)
Comprehensive Income	2,697	2,506	2,248
Preferred stock dividend requirement	110	37	14
Comprehensive Income Attributable to Common Shareholders	$ 2,587	$ 2,469	$ 2,234