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Stock Plans and Share-Based Compensation
12 Months Ended
Dec. 31, 2020
Share-based Payment Arrangement [Abstract]  
Stock Plans and Share-Based Compensation Stock Plans and Share-Based Compensation
    Under CSX's share-based compensation plans, awards consist of performance units, stock options, restricted stock units and restricted stock awards for management and stock grants for directors. Awards granted under the various programs are determined and approved by the Compensation and Talent Management Committee of the Board of Directors. Awards to the Chief Executive Officer are approved by the full Board and awards to senior executives are approved by the Compensation and Talent Management Committee. In certain circumstances, the Chief Executive Officer or delegate approves awards to management employees other than senior executives. The Board of Directors approves awards granted to CSX's non-management directors upon recommendation of the Governance and Sustainability Committee.

Share-based compensation expense for awards under share-based compensation plans and purchases made as part of the employee stock purchase plan is measured using the fair value of the award on the grant date and is recognized on a straight-line basis over the service period of the respective award or upon grant date to certain retirement-eligible employees whose agreements allow for continued vesting upon retirement. Forfeitures are recognized as they occur. Total pre-tax expense and income tax benefits associated with share-based compensation are shown in the table below. Income tax benefits include impacts from option exercises and the vesting of other equity awards.

 Fiscal Years
(Dollars in Millions)202020192018
Share-Based Compensation Expense
Stock Options$19 $18 $13 
Restricted Stock Units and Awards6 
Employee Stock Purchase Plan5 
Stock Awards for Directors2 
Performance Units(3)42 28 
Total Share-based Compensation Expense$29 $74 $51 
Income Tax Benefit$19 $43 $26 
NOTE 4.  Stock Plans and Share-Based Compensation, continued

Long-term Incentive Plans
The objective of the CSX Long-term Incentive Plans (“LTIP”) is to motivate and reward certain employees for achieving and exceeding certain financial goals. The 2020-2022 LTIP was adopted under the 2019 Stock and Incentive Award Plan and the 2019-2021 and 2018-2020 LTIPs were adopted under the 2010 Stock and Incentive Award Plan. Grants were made in performance units, with each unit being equivalent to one share of CSX common stock, and payouts will be made in CSX common stock. The payout range for most participants will be between 0% and 200% of the target awards depending on Company performance against predetermined goals for each three-year cycle.

In 2020, 2019, and 2018, target performance units were granted to certain employees under three separate LTIP plans covering three-year cycles: the 2020-2022 ("2020-2022 LTIP"), the 2019-2021 (“2019-2021 LTIP”), and the 2018-2020 (“2018-2020 LTIP”) plans. Payouts of performance units for the 2020-2022, 2019-2021 and 2018-2020 LTIP plans will be based on the achievement of certain goals, in each case excluding non-recurring items as disclosed in the Company’s financial statements.

For the 2020-2022 LTIP plan, the cumulative operating income and cumulative free cash flow over the plan period will each comprise 50% of the payout and will be measured independently of the other. Participants will receive stock dividend equivalents declared over the performance period based on the number of performance units paid upon vesting.
For the 2019-2021 LTIP plan, the cumulative operating ratio and cumulative free cash flow over the plan period will each comprise 50% of the payout and will be measured independently of the other.
For the 2018-2020 LTIP plan, the final year operating ratio and cumulative free cash flow over the plan period will each comprise 50% of the payout and will be measured independently of the other.

For these plans, payouts for certain executive officers are subject to formulaic upward or downward adjustment by up to 25%, capped at an overall payout of 200% for the 2018 plan and 250% for the 2019 and 2020 plans, based upon the Company’s total shareholder return relative to specified comparable groups over the performance period.

The fair value of the performance units awarded during the years ended December 2020, 2019 and 2018 were calculated primarily using a Monte-Carlo simulation model with the following weighted-average assumptions:

Weighted-average assumptions used:202020192018
Annual dividend yieldn/a1.4 %1.6 %
Risk-free interest rate1.4 %2.4 %2.3 %
Annualized volatility24.5 %27.4 %29.1 %
Expected life (in years)
2.92.82.9
NOTE 4.  Stock Plans and Share-Based Compensation, continued

    Performance unit grant and vesting information is summarized as follows:
 Fiscal Years
 202020192018
Weighted-average grant date fair value $76.17 $66.18 $55.57 
Fair value of units vested in fiscal year ending (in millions)
$18 $17 $14 

The performance unit activity related to the outstanding long-term incentive plans and corresponding fair value is summarized as follows:
 Performance Units Outstanding
(in Thousands)
Weighted-Average Fair Value at Grant Date
Unvested at December 31, 2019643 $60.58 
Granted 356 76.17 
Forfeited (34)66.71 
Vested (325)55.35 
Unvested at December 31, 2020640 $71.59 

As of December 2020, there was $2 million of total unrecognized compensation cost related to performance units that is expected to be recognized over a weighted-average period of approximately one year. 

Stock Options
    Stock options in 2020, 2019, and 2018 were primarily granted along with the corresponding LTIP plans. Under this program, an employee receives an award that provides the opportunity in the future to purchase CSX shares at the closing market price of the stock on the date the award is granted (the strike price). Options granted in 2020 and 2019 become exercisable either in equal installments on the anniversary of the grant date over a vesting period (three-year graded) or three years after the grant date (three-year cliff), depending on the individual grant. The options granted in 2018 vest three years after the grant date (three-year cliff). All options expire 10 years from the grant date if they are not exercised.

The fair value of stock options granted was estimated as of the dates of grant using the Black-Scholes option valuation model, which uses the following assumptions: dividend yield, risk-free interest rate, annualized volatility and expected life. The annual dividend yield is based on the most recent quarterly CSX dividend payment annualized. The risk-free interest rate is based on U.S. Treasury yield curve in effect at the time of grant. The annualized volatility is based on historical volatility of daily CSX stock price returns over a 6.0 year look-back period ending on the grant date. The expected life is calculated using the safe harbor approach due to lack of historical data on CSX options, which is the midpoint between the vesting schedule and contractual term (10 years).
NOTE 4.  Stock Plans and Share-Based Compensation, continued

    Assumptions and inputs used to estimate fair value of stock options are summarized as follows:
Fiscal Years
 202020192018
Weighted-average grant date fair value $18.94 $17.87 $14.65 
Stock options valuation assumptions:
Annual dividend yield1.2 %1.3 %1.5 %
Risk-free interest rate1.4 %2.4 %2.6 %
Annualized volatility26.1 %25.7 %27.0 %
Expected life (in years)6.06.16.5
Other pricing model inputs:
Weighted-average grant-date market price of CSX stock (strike price)$79.58 $70.01 $54.19 

The stock option activity is summarized as follows:
 Stock Options Outstanding
(in Thousands)
Weighted-Average Exercise PriceWeighted-Average Remaining Contractual Life
(in Years)
Aggregate Intrinsic Value
(in Millions)
Outstanding at December 31, 20193,795 $49.78 
Granted 1,339 79.58 
Forfeited (131)72.04 
Exercised(786)37.41 
Outstanding at December 31, 20204,217 $60.88 7.5$126 
Exercisable at December 31, 20201,257 $40.05 6.0$64 

Unrecognized compensation expense related to stock options as of December 2020 was $18 million and is expected to be recognized over a weighted-average period of approximately two years. The Company issues new shares upon stock option exercises. There were no significant exercises during 2018. Additional information on stock option exercises is summarized as follows:

(Dollars in Millions)20202019
Intrinsic value of stock options exercised$30 $87 
Cash received from option exercises$29 $45 
NOTE 4.  Stock Plans and Share-Based Compensation, continued

Restricted Stock Grants
    Restricted stock grants consist of units and awards, each equivalent to one share of CSX stock. Restricted stock units are primarily issued along with corresponding LTIP plans and vest three years after the date of grant. Separately, restricted stock awards generally vest over an employment period of up to five years. These awards are time-based and not based upon CSX’s attainment of operational targets. Participants receive cash or stock dividend equivalents on these shares, depending on the grant. Restricted stock grant and vesting information is summarized as follows:

 Fiscal Years
 202020192018
Weighted-average grant date fair value$79.30 $69.19 $62.60 
Fair value of units and awards vested during fiscal year ended (in millions)
$8 $$
    
The restricted stock activity related to the outstanding long-term incentive plans and other awards and corresponding fair value is summarized as follows:
 Restricted Stock Units and Awards Outstanding
(in Thousands)
Weighted-Average Fair Value at Grant Date
Unvested at December 31, 2019427 $57.29 
Granted106 79.30 
Forfeited (24)63.12 
Vested (157)48.42 
Unvested at December 31, 2020352 $67.08 
    
As of December 2020, unrecognized compensation expense for these restricted stock units and awards was approximately $9 million, which will be expensed over a weighted-average remaining period of two years.
NOTE 4.  Stock Plans and Share-Based Compensation, continued

Stock Awards for Directors
    CSX’s non-management directors receive a base annual retainer of $112,500 to be paid quarterly in cash, unless the director chooses to defer the retainer in the form of cash or CSX common stock. Additionally, non-management directors receive an annual grant of common stock in the amount of approximately $162,500, with the number of shares to be granted based on the average closing price of CSX stock in the months of November, December and January. The independent non-executive Chairman also receives an annual grant of common stock in the amount of approximately $250,000, with the number of shares to be granted based on the average closing price of CSX stock in the months of November, December, and January. These awards are evaluated periodically by the Board of Directors.

Employee Stock Purchase Plan
In May 2018, shareholders approved the 2018 CSX Employee Stock Purchase Plan (“ESPP”) for the benefit of Company employees. The Company registered 4 million shares of common stock that may be issued pursuant to this plan. Under the ESPP, employees may contribute between 1% and 10% of base compensation, after-tax, to purchase up to $25,000 of market value CSX common stock per year at 85% of the closing market price on either the grant date or the last day of the six-month offering period, whichever is lower. During 2019 and 2020, the Company issued the following shares under this program.

 Fiscal Years
 20202019
Shares issued (in thousands)242 249 
Weighted average purchase price per share$60.40 $52.72