Equity, Option Plans (Details) - Stock Options - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Stock-Based Compensation
Total intrinsic value of stock options exercised (in dollars)	$ 559.6	$ 245.1	$ 430.9
Total fair value of stock options vested (in dollars)	90.0	$ 79.9	$ 71.7
Total compensation cost related to non-vested options not yet recognized (in dollars)	$ 250.3
Weighted average expected amortization period	3 years 4 months 9 days