Summary of Significant Accounting Policies and Other Matters - Earnings Per Common Share (Details) - USD ($) $ / shares in Units, shares in Millions, $ in Millions	3 Months Ended
	Mar. 31, 2025	Mar. 31, 2024
Accounting Policies [Abstract]
Net income for common stock	$ 791	$ 720
Weighted average common shares outstanding – basic (shares)	350.1	345.5
Add: Incremental shares attributable to effect of potentially dilutive securities (shares)	1.2	1.3
Adjusted weighted average common shares outstanding – diluted (shares)	351.3	346.8
Net income per common share - basic (dollars per share)	$ 2.26	$ 2.08
Net income per common share - diluted (dollars per share)	$ 2.25	$ 2.08