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Stock-Based Compensation - Additional Information (Details) - Performance stock units
shares in Millions
9 Months Ended
Sep. 30, 2018
shares
Share-based Compensation Arrangement by Share-based Payment Award, Non-Option Equity Instruments, Outstanding, Number 1.6 [1]
Share-based Compensation Arrangement by Share-based Payment Award, Description On each vesting date, recipients will receive between 0% and 200% of the granted PSUs in the form of CEC common stock based on the achievement of specified performance service conditions. Based on the terms and conditions of the awards, the fair value of the PSUs was initially set equal to the quoted market price of our common stock on the date of grant, but will need to be reassessed each reporting period.
[1] (2) Represents weighted average exercise price for stock options, weighted average grant date fair value for RSUs, and the price of CEC common stock as of the balance sheet date for PSUs.