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Stock-Based Compensation and Stockholder's Equity (Tables)

12 Months Ended

Dec. 31, 2021

Share-based Payment Arrangement, Noncash Expense [Abstract]

Summary of RSU Activity Including Performance Awards and Converted Isle Awards

A summary of the RSUs activity for the year ended December 31, 2021 is presented in the following table:

			Units						Weighted Average Grant Date Fair Value (a)
Unvested outstanding as of December 31, 2020			2,414,111						$	42.55
Granted (b)			927,016						86.37
Vested			(1,136,673)						33.49
Forfeited			(113,847)						54.34
Unvested outstanding as of December 31, 2021			2,090,607						61.47

____________________

(a)Represents the weighted-average grant date fair value of RSUs, which is the share price of our common stock on the grant date.

(b)Included are 23,139 RSUs granted to non-employee members of the Board during the year ended December 31, 2021.

A summary of the PSUs activity for the year ended December 31, 2021 is presented in the following table:

			Units						Weighted Average Grant Date Fair Value (a)
Unvested outstanding as of December 31, 2020 (b)			500,483						$	48.32
Granted			81,006						112.28
Vested			(161,556)						37.49
Forfeited			(2,864)						73.21
Unvested outstanding as of December 31, 2021			417,069						62.20

____________________

(a)Grant date fair value, for which compensation expense of these unvested awards is measured, has not been achieved. This represents the quoted market price of our common stock on the dated indicated.

(b)PSUs were presented with RSUs as of December 31, 2020 in the 2020 Annual Report.

Share-based Payment Arrangement, Activity

A summary of the MSUs activity for the year ended December 31, 2021 is presented in the following table:

			Units						Weighted- Average Fair Value (a)
Unvested outstanding as of December 31, 2020			446,087						$	49.37
Granted			147,471						102.98
Vested			(208,866)						28.56
Forfeited			(2,769)						84.12
Unvested outstanding as of December 31, 2021			381,923						77.09

____________________

(a)Represents the grant date fair value determined using a Monte Carlo simulation model.

Schedule of Share-based Compensation, Stock Options Activity

Stock Option Activity
			Shares						Weighted Average Exercise Price												Weighted Average Remaining Contractual Term (years)						Aggregate Intrinsic Value (in millions)
Outstanding as of December 31, 2020			176,724						$	22.57											1.71						$	9
Exercised			(114,884)						22.64
Forfeited			(1,233)						26.65
Expired			(16,702)						26.67
Outstanding as of December 31, 2021			43,905						20.69												1.05						3
Vested and expected to vest as of December 31, 2021			43,905						20.69												1.05						3
Exercisable as of December 31, 2021			42,610						20.84												1.05						3

Stock Option Exercises
			Years Ended December 31,
(Dollars in millions)			2021						2020						2019
Option Exercises:
Number of options exercised			114,884						70,608						—
Cash received for options exercised			$	3					$	1					$	—
Aggregate intrinsic value of options exercised			$	9					$	5					$	—

X

- Definition

Tabular disclosure of activity for award under share-based payment arrangement. Includes, but is not limited to, outstanding award at beginning and end of year, granted, exercised, forfeited, and weighted-average grant date fair value.

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Tabular disclosure of the number and weighted-average grant date fair value for restricted stock units that were outstanding at the beginning and end of the year, and the number of restricted stock units that were granted, vested, or forfeited during the year.

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Tabular disclosure for stock option plans. Includes, but is not limited to, outstanding awards at beginning and end of year, grants, exercises, forfeitures, and weighted-average grant date fair value.

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