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Stock-based Payments (Tables)

6 Months Ended

Jun. 30, 2020

The tables below summarize the Company’s outstanding time-based stock options (in millions, except for per share amounts):


	Time-Based Options
	Number of Options	Weighted Average Exercise Price per Share		Weighted Average Remaining Contractual Term (in years)
Outstanding as of December 31, 2019	2.6	$	11.51	5.9

Exercised	(0.1)	10.10		—
Forfeited	(0.0)	13.11		—
Outstanding as of June 30, 2020	2.5	$	11.52	5.4
Exercisable as of June 30, 2020	1.9	$	10.82	5.3

The tables below summarize the Company’s outstanding performance-based stock options (in millions, except for per share amounts):


	Performance-Based Options
	Number of Options	Weighted Average Exercise Price per Share		Weighted Average Remaining Contractual Term (in years)
Outstanding as of December 31, 2019	1.4	$	11.64	5.9



Outstanding as of June 30, 2020	1.4	$	11.64	5.4
Exercisable as of June 30, 2020	—	—		—

The following table provides information about the Company’s outstanding restricted stock units ("RSUs") (in millions, except for per share amounts):


	Co-Investment RSUs				Time-Based RSUs					Performance-Based RSUs
	Number of RSUs	Weighted Average Fair Value Per Share		Number of RSUs	Weighted Average Fair Value Per Share		Number of RSUs	Weighted Average Fair Value Per Share
Unvested as of December 31, 2019	0.0	$	17.00	5.7	$	15.63	1.1	$	17.08
Granted	—	—		1.8	16.26		0.5	17.59
Vested	(0.0)	17.00		(1.8)	14.22		(0.1)	17.29
Forfeited	—	—		(0.1)	17.73		—	—
Unvested as of June 30, 2020	—	$	—	5.6	$	15.96	1.5	$	16.46

The following table summarizes the Company's compensation expense related to RSUs (in millions):


	Three Months Ended June 30,							Six Months Ended June 30,					Unrecognized at June 30, 2020
			2020		2019			2020		2019
Time-Based RSUs	$	11.4	$	11.4		$	22.2	$	21.1		$	58.1
Co-Investment RSUs	—		0.1			0.1		0.2			—
Performance-Based RSUs	1.3		0.5			2.1		0.7			11.8


Total RSU stock-based compensation cost	$	12.7	$	12.0		$	24.4	$	22.0		$	69.9