Stock-Based Compensation, Stock-based Comp Expense (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2025	Sep. 30, 2024	Sep. 30, 2025	Sep. 30, 2024
Stock-Based Compensation
Expense incurred for stock-based compensation plans	$ 36.9	$ 29.5	$ 94.8	$ 79.9
Recognized tax benefit related to stock-based compensation	61.1	24.5	172.9	90.3
Excess tax benefit from option exercises	$ 57.1	$ 21.4	$ 162.6	$ 82.0