PSU awards are granted with a target value established at the date of grant and vest upon completion of a service requirement. The settlement amount of the PSUs is determined based on market and performance metrics, which include our total shareholder return performance relative to the stock market index defined by each award and specified internal performance metrics designed to drive greater shareholder return. PSU compensation expense is based on a fair value assigned to the market metric upon grant using a Monte Carlo model, which remains constant throughout the vesting period of three years and a performance multiplier, which will vary due to changing estimates of the performance metric condition. During 2020, 2019 and 2018, we granted 0.3 million, 0.3 million and 0.2 million PSUs, respectively, each with a weighted-average fair value of $52.60, $53.31 and $78.30, respectively. Stock options are granted with an exercise price equal to the market value of a share of Class B common stock on the date of grant. Stock options have a term of ten years and generally vest over three years. During 2020, 2019 and 2018, we granted 0.4 million, 0.4 million and 0.2 million options, respectively, each with a weighted-average fair value of $6.70, $9.20 and $15.44, respectively. Certain RSU and PSU awards granted in 2020 entitle participants to receive dividends upon vesting, subject to the performance, vesting and other conditions, including forfeiture, applicable to the respective awards. As of December 31, 2020, there was $34.2 million of total unrecognized compensation cost from all share-based compensation arrangements granted under the Incentive Compensation Plan, related to unvested awards. This total compensation expense is expected to be recognized over a weighted-average period of 1.9 years. The weighted-average fair value per unit for the non-vested PSUs is $32.76 as of December 31, 2020. The total intrinsic values of RSUs and DSUs vested during 2020, 2019 and 2018 were $14.8 million, $23.6 million and $24.8 million, respectively. RSUs and DSUs PSUs Units Weighted-average grant date fair value per unit Units Weighted-average grant date fair value per unit (In millions, except per unit amounts) Non-vested as of December 31, 2019 1.0 $68.18 0.6 $70.37 Granted 0.5 $48.81 0.3 $52.60 Vested (0.3) $84.81 — $— Forfeited (0.2) $64.12 (0.2) $66.22 Non-vested as of December 31, 2020 1.0 $56.21 0.7 $58.12 (1) The decrease in share-based compensation expense in 2019 was primarily driven by the reversal of cumulative compensation expense previously recognized for our 2018 and 2017 PSU awards as the achievement of the performance conditions are no longer deemed probable for the respective performance periods, as well as the impacts of the reversal of expense associated with forfeitures related to the revitalization plan initiated in 2019. Additionally, our share-based compensation expense in 2018 also includes expense associated with replacement awards issued in connection with the Acquisition. 114 For the years ended December 31, 2020 December 31, 2019 December 31, 2018 (In millions) Pretax share-based compensation expense $ 24.2  $ 8.5  $ 42.6  Tax benefit (4.3) (1.6) (6.9) After-tax share-based compensation expense $ 19.9  $ 6.9  $ 35.7  (1)