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Stock-Based Compensation (Tables)
 12 Months Ended
Dec. 31, 2022
Share-Based Payment Arrangement [Abstract]  
Schedule of stock-based compensation expense
The total recognized and unrecognized stock-based compensation expense is as follows:
Year Ended December 31,Unrecognized Stock-Based Compensation Expense
(In millions)202220212020December 31, 2022
Performance based share units$7 $5 $6 $9 
Restricted stock units20 12 10 20 
Stock options— 1 2 — 
  Total stock-based compensation expense$27 $18 $18 $29 
Summary of employee activity for PSUs
A summary of PSU activity is provided below: PSUsWeighted Average Grant Date Fair Value
(In thousands)
Non-vested as of December 31, 2019
170 $118.77 
Granted94 84.20 
Vested(66)116.35 
Forfeited (18)100.51 
Non-vested as of December 31, 2020
180 106.48 
Granted55 148.71 
Vested(52)131.48 
Forfeited (15)112.01 
Non-vested as of December 31, 2021
168 112.24 
Granted98 164.24 
Vested(86)115.70 
Forfeited(8)141.76 
Non-vested as of December 31, 2022
172 $128.28 
Schedule of valuation assumptions to estimate fair value of PSUs eighted average assumptions used to estimate the fair value of PSUs granted during the years ended as of December 31, 2022 and 2021 are as follows:
Year Ended December 31,
20222021
Expected volatility52.12 %54.17 %
Risk-free rate1.46 %0.31 %
Expected dividend yield— %— %
Summary of employee activity for RSUs
A summary of RSU activity is provided below:
RSUsWeighted Average Grant Date Fair Value
(In thousands)
Non-vested as of December 31, 2019
216$90.98 
Granted
231 77.57 
Vested
(84)95.70 
Forfeited
(46)77.47 
Non-vested as of December 31, 2020
317 82.31 
  Granted117 124.34 
Vested
(106)84.80 
Forfeited
(43)88.64 
Non-vested as of December 31, 2021
285 97.68 
  Granted293 115.13 
  Vested(171)91.48 
  Forfeited(52)107.10 
Non-vested as of December 31, 2022
355 $113.41 
Weighted average assumptions used to estimate fair value of awards granted Weighted average assumptions used to estimate the fair value of awards granted during the year ended December 31, 2020 are as follows:
2020
Expected term (in years)5
Expected volatility35.23 %
Risk-free interest rate0.75 %
Expected dividend yield— %
Summary of employee activity for stock options and SARs
A summary of Stock Options and SAR activity is provided below:
Stock OptionsWeighted Average
Exercise Price		SARsWeighted Average
Exercise Price
(In thousands)(In thousands)
December 31, 2019283 $93.51 7 $72.84 
Granted
112 66.98 — — 
Exercised
(27)84.98 (1)56.59 
Forfeited or expired
(20)96.12 — — 
December 31, 2020348 85.46 6 74.77 
Exercised
(19)80.74 (6)74.77 
Forfeited or expired
(17)89.17 — — 
December 31, 2021312 85.56 — — 
  Exercised(51)75.05 — — 
December 31, 2022261 $87.62 — $— 
Exercisable at December 31, 2022
227 $90.70 — $— 
Stock Options
Exercise PriceNumber OutstandingWeighted
Average
Remaining Life		Weighted
Average
Exercise Price
(In thousands)(In years)
$60.01 - $80.00
93 4.3$66.98 
$80.01 - $100.00
113 2.4$86.76 
$100.01 - $130.00
55 2.3$124.35 
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