Stock-Based Compensation, Option Plans (Details) - Employee Stock Option [Member] - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2023	Jun. 30, 2022	Jun. 30, 2023	Jun. 30, 2022
Stock-Based Compensation
Total intrinsic value of stock options exercised (in dollars)	$ 113.9	$ 34.9	$ 239.5	$ 69.2
Total fair value of stock options vested (in dollars)	86.3	$ 78.1	88.6	$ 78.8
Total compensation cost related to non-vested options not yet recognized (in dollars)	$ 296.0		$ 296.0
Weighted average expected amortization period			3 years 8 months 23 days