Stock-Based Compensation, Option Plans (Details) - Stock Options - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2024	Jun. 30, 2023	Jun. 30, 2024	Jun. 30, 2023
Stock-Based Compensation
Total intrinsic value of stock options exercised (in dollars)	$ 245.8	$ 113.9	$ 461.6	$ 239.5
Total fair value of stock options vested (in dollars)	95.6	$ 86.3	97.9	$ 88.6
Total compensation cost related to non-vested options not yet recognized (in dollars)	$ 338.4		$ 338.4
Weighted average expected amortization period			3 years 9 months