Stock-Based Compensation (Tables)

6 Months Ended

Jun. 30, 2020

Stock-Based Compensation

Schedule of stock option activity

				Weighted
				Average	Aggregate
		Weighted		Remaining	Intrinsic
		Average		Contractual	Value
	Options	Exercise Price		Term (in years)	(in millions)
Options outstanding at January 1, 2020	35,675,206	$	67.70	6.75	$	1,445.9
Options granted	—		—
Options exercised	(715,546)		42.46
Options forfeited	(90,070)		80.19
Options outstanding at March 31, 2020	34,869,590		68.19	6.56		356.0
Options granted	6,106,700		90.23
Options exercised	(2,425,365)		50.57
Options forfeited	(41,520)		80.75
Options outstanding at June 30, 2020	38,509,405	$	72.78	7.01	$	887.2
Vested and non-vested options expected to vest at June 30, 2020	36,012,192	$	72.09	6.92	$	854.4
Exercisable options at June 30, 2020	19,734,445	$	61.47	5.58	$	677.7

Summary of status of non-vested options and changes during the year

		Weighted
		Average
		Fair Value at
	Options	Grant Date
Non-vested options at January 1, 2020	19,016,830	$	10.72
Options granted	—		—
Options vested	(67,920)		8.62
Options forfeited	(90,070)		10.89
Non-vested options at March 31, 2020	18,858,840		10.73
Options granted	6,106,700		16.35
Options vested	(6,149,060)		9.88
Options forfeited	(41,520)		10.96
Non-vested options at June 30, 2020	18,774,960	$	12.83

Summary of activity in the option plans

	Three Months Ended				Six Months Ended
	June 30,				June 30,
	2020		2019		2020		2019
Total intrinsic value of stock options exercised	$	125.2	$	110.4	$	170.3	$	180.5
Total fair value of stock options vested		60.8		55.7		61.4		56.2

Schedule of restricted share activity

				Weighted Average
				Remaining
	Restricted	Fair Value at		Amortization
	Shares	Grant Date		Term (in years)
Restricted shares outstanding at January 1, 2020	12,516	$	89.49	0.39
Restricted shares granted	—		—
Restricted shares outstanding at March 31, 2020	12,516		89.49	0.13
Shares vested and issued	(12,516)		89.49
Restricted shares granted	12,418		90.21
Restricted shares outstanding at June 30, 2020	12,418	$	90.21	0.88