Stock-Based Compensation (Tables)

3 Months Ended

Mar. 31, 2015

Stock-Based Compensation

Schedule of stock option activity

	Options		Weighted Average Exercise Price		Weighted Average Remaining Contractual Term (in years)	Aggregate Intrinsic Value
Options outstanding at January 1, 2015	27,787,920		$	31.60	7.09	$	617.2
Options granted	92,000
Options exercised	(742,280	)
Options forfeited	(92,680	)
Options outstanding at March 31, 2015	27,044,960		31.95		6.91	729.7
Vested and non-vested options expected to vest at March 31, 2015	24,835,981		$	31.54	6.83	$	680.2
Exercisable options at March 31, 2015	10,632,080		$	23.32	5.32	$	378.6

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

	Options		Weighted Average Fair Value at Grant Date
Non-vested options at January 1, 2015	16,440,560		$	7.98
Options granted	92,000		10.30
Options vested	(27,000	)	9.51
Options forfeited	(92,680	)	7.94
Non-vested options at March 31, 2015	16,412,880		7.99

Summary of activity in the option plans

	Three months ended March 31,
	2015		2014
Total intrinsic value of stock options exercised	$	25.9	$	15.6
Total fair value of stock options vested	0.3		0.1

Schedule of Restricted Stock Units Award Activity

	Restricted Shares	Fair Value at Grant Date		Weighted Average Remaining Amortization Term (in years)
Restricted shares outstanding at January 1, 2015	18,340	$	47.72	0.39
Restricted shares granted	692	54.96
Restricted shares outstanding at March 31, 2015	19,032	47.98		0.15