Stock-Based Compensation, Stock Option Activity (Details) - Stock Options - USD ($) $ / shares in Units, $ in Millions	3 Months Ended	12 Months Ended
	Mar. 31, 2024	Dec. 31, 2023
Stock option activity
Options outstanding at the beginning of the period (in shares)	60,390,162
Non-vested options, options granted (in shares)	58,031
Options exercised (in shares)	(3,156,425)
Options forfeited (in shares)	(43,137)
Options outstanding at the end of the period (in shares)	57,248,631	60,390,162
Vested and non-vested options expected to vest at the end of the period (in shares)	55,794,585
Exercisable at the end of the period (in shares)	34,849,870
Weighted Average Exercise Price
Weighted average exercise price, options outstanding at the beginning of the period (in dollars per share)	$ 50.45
Weighted average exercise price, options granted (in dollars per share)	90.72
Weighted average exercise price, options exercised (in dollars per share)	37.27
Weighted average exercise price, options forfeited (in dollars per share)	65.02
Weighted average exercise price, options outstanding at the end of the period (in dollars per share)	51.21	$ 50.45
Weighted average exercise price, vested and non-vested options expected to vest (in dollars per share)	50.80
Weighted average exercise price, exercisable (in dollars per share)	$ 43.54
Weighted Average Remaining Contractual Term
Weighted average remaining contractual term of options outstanding	5 years 8 months 8 days	5 years 9 months 21 days
Weighted average remaining contractual term of options vested options and non-vested expected to vest	5 years 7 months 17 days
Weighted average remaining contractual term of options exercisable	4 years 6 months 10 days
Aggregate Intrinsic Value
Aggregate intrinsic value of options outstanding	$ 3,671.9	$ 2,939.5
Aggregate intrinsic value of options, vested and non-vested options expected to vest	3,601.3
Aggregate intrinsic value of options exercisable	$ 2,502.7