XML 79 R60.htm IDEA: XBRL DOCUMENT v3.24.0.1
Equity-Based Compensation - PSU awards (Details)
$ / shares in Units, $ in Millions
3 Months Ended 12 Months Ended
Mar. 31, 2024
$ / shares
shares
Dec. 31, 2023
USD ($)
item
$ / shares
shares
Dec. 31, 2022
item
$ / shares
shares
Dec. 31, 2021
item
$ / shares
Dec. 31, 2020
item
Dec. 31, 2019
Dec. 31, 2018
PSUs              
Stock-based compensation              
Number of shares of common stock awards converted into | shares   400,000          
Number of units              
Total awarded and unvested at the beginning of the period (in shares) | shares 1,412,191 1,329,725          
Granted (in shares) | shares   417,466          
Vested (in shares) | shares   (335,000)          
Total awarded and unvested at the end of the period (in shares) | shares   1,412,191 1,329,725        
Weighted average grant date fair value              
Total awarded and unvested at the beginning of the period (in dollars per share) | $ / shares $ 29.54 $ 23.18          
Granted (in dollars per share) | $ / shares   28.51 $ 37.96 $ 9.71      
Vested (in dollars per share) | $ / shares   2.97          
Total awarded and unvested at the end of the period (in dollars per share) | $ / shares   $ 29.54 $ 23.18        
Additional disclosures              
Unamortized equity-based compensation expense | $   $ 19          
Weighted average period for recognizing unrecognized stock-based compensation expense   1 year 6 months          
Weighted-average assumptions used to calculate fair value of performance share units granted              
Dividend yield (as a percent)   0.00%          
Volatility (as a percent)       85.00%      
Volatility, minimum (as a percent)   82.00% 87.00%        
Volatility, maximum (as a percent)     88.00%        
Risk-free interest rate (as a percent)   4.61%   0.32%      
Risk-free interest rate, minimum (as a percent)   4.61% 2.65%        
Risk-free interest rate, maximum (as a percent)     4.49%        
Weighted average fair value of awards granted-Absolute TSR | $ / shares   $ 33.96 $ 49.32 $ 11.99      
PSU Awards Based on Absolute TSR              
Stock-based compensation              
Vesting percentage achieved   112.00%          
2018 PSU Awards based on Absolute TSR              
Stock-based compensation              
Service period             3 years
Number of PSUs that may be earned as compared to the number of PSUs granted, as a percent             0.00%
Price target as a percentage of beginning price             125.00%
Amortization period of PSU expense             3 years
2018 PSU Awards based on Absolute TSR | Minimum              
Stock-based compensation              
Number of PSUs that may be earned as compared to the number of PSUs granted, as a percent             0.00%
2018 PSU Awards based on Absolute TSR | Maximum              
Stock-based compensation              
Number of PSUs that may be earned as compared to the number of PSUs granted, as a percent             200.00%
2019 PSU Awards Based on Absolute TSR              
Stock-based compensation              
Service period           3 years  
Vesting percentage achieved     200.00%        
Shares issued to cover conversions (in shares) | shares     2,000,000        
Price target as a percentage of beginning price           125.00%  
2019 PSU Awards Based on Absolute TSR | Minimum              
Stock-based compensation              
Number of PSUs that may be earned as compared to the number of PSUs granted, as a percent           0.00%  
2019 PSU Awards Based on Absolute TSR | Maximum              
Stock-based compensation              
Number of PSUs that may be earned as compared to the number of PSUs granted, as a percent           200.00%  
2020 PSU Awards Based on Absolute TSR              
Stock-based compensation              
Vesting percentage achieved   112.00%          
Shares issued to cover conversions (in shares) | shares   200,000          
Number of performance periods         3    
Number of cumulative performance periods         1    
Amortization period of PSU expense         3 years    
2020 PSU Awards Based on Absolute TSR | Minimum              
Stock-based compensation              
Number of PSUs that may vest, as a percent         0.00%    
2020 PSU Awards Based on Absolute TSR | Maximum              
Stock-based compensation              
Number of PSUs that may vest, as a percent         150.00%    
2020 PSU Awards Based on Absolute TSR | One Year Period              
Stock-based compensation              
Service period         1 year    
2020 PSU Awards Based on Absolute TSR | Three Year Period              
Stock-based compensation              
Service period         3 years    
2021 PSU Awards Based on Absolute TSR              
Stock-based compensation              
Number of performance periods       3      
Number of cumulative performance periods       1      
2021 PSU Awards Based on Absolute TSR | Minimum              
Stock-based compensation              
Number of PSUs that may vest, as a percent       0.00%      
2021 PSU Awards Based on Absolute TSR | Maximum              
Stock-based compensation              
Number of PSUs that may vest, as a percent       200.00%      
2021 PSU Awards Based on Absolute TSR | Vesting before first anniversary              
Stock-based compensation              
Number of PSUs that may be earned as compared to the number of PSUs granted, as a percent       200.00%      
2021 PSU Awards Based on Absolute TSR | Vesting before the second anniversary              
Stock-based compensation              
Number of PSUs that may be earned as compared to the number of PSUs granted, as a percent       0.00%      
2021 PSU Awards Based on Absolute TSR | One Year Period              
Stock-based compensation              
Service period       1 year      
2021 PSU Awards Based on Absolute TSR | Three Year Period              
Stock-based compensation              
Service period       3 years      
2022 PSU Awards Based on Absolute TSR              
Stock-based compensation              
Number of performance periods     3        
Number of cumulative performance periods     1        
Number of PSUs that may be earned as compared to the number of PSUs granted, as a percent     0.00%        
2022 PSU Awards Based on Absolute TSR | Minimum              
Stock-based compensation              
Number of PSUs that may vest, as a percent     0.00%        
2022 PSU Awards Based on Absolute TSR | Maximum              
Stock-based compensation              
Number of PSUs that may vest, as a percent     200.00%        
2022 PSU Awards Based on Absolute TSR | One Year Period              
Stock-based compensation              
Service period     1 year        
2022 PSU Awards Based on Absolute TSR | Three Year Period              
Stock-based compensation              
Service period     3 years        
2022 PSU Awards Based on Absolute TSR Special              
Stock-based compensation              
Number of performance periods     3        
Number of cumulative performance periods     1        
Number of PSUs that may be earned as compared to the number of PSUs granted, as a percent     0.00%        
2022 PSU Awards Based on Absolute TSR Special | Minimum              
Stock-based compensation              
Number of PSUs that may vest, as a percent     0.00%        
2022 PSU Awards Based on Absolute TSR Special | Maximum              
Stock-based compensation              
Number of PSUs that may vest, as a percent     200.00%        
2022 PSU Awards Based on Absolute TSR Special | One Year Period              
Stock-based compensation              
Service period     1 year        
2022 PSU Awards Based on Absolute TSR Special | Three Year Period              
Stock-based compensation              
Service period     3 years        
2023 PSU Awards Based on Absolute TSR              
Stock-based compensation              
Number of performance periods   3          
Number of cumulative performance periods   1          
2023 PSU Awards Based on Absolute TSR | Minimum              
Stock-based compensation              
Number of PSUs that may vest, as a percent   0.00%          
2023 PSU Awards Based on Absolute TSR | Maximum              
Stock-based compensation              
Number of PSUs that may vest, as a percent   200.00%          
2023 PSU Awards Based on Absolute TSR | One Year Period              
Stock-based compensation              
Service period   1 year          
2023 PSU Awards Based on Absolute TSR | Three Year Period              
Stock-based compensation              
Service period   3 years          
PSU Awards Based On Relative TSR              
Stock-based compensation              
Vesting percentage achieved   126.00%          
Shares issued to cover conversions (in shares) | shares   200,000          
Number of performance periods         3    
Number of cumulative performance periods         1    
Amortization period of PSU expense         3 years    
PSU Awards Based On Relative TSR | Minimum              
Stock-based compensation              
Number of PSUs that may vest, as a percent         0.00%    
PSU Awards Based On Relative TSR | Maximum              
Stock-based compensation              
Number of PSUs that may vest, as a percent         150.00%    
PSU Awards Based On Relative TSR | One Year Period              
Stock-based compensation              
Service period         1 year    
PSU Awards Based On Relative TSR | Three Year Period              
Stock-based compensation              
Service period         3 years    
2021 PSU Awards Based on Leverage Ratio              
Stock-based compensation              
Service period       1 year      
Vesting percentage achieved       200.00%      
Number of performance periods       3      
2021 PSU Awards Based on Leverage Ratio | Forecast              
Stock-based compensation              
Shares issued to cover conversions (in shares) | shares 400,000            
2021 PSU Awards Based on Leverage Ratio | Minimum              
Stock-based compensation              
Number of PSUs that may vest, as a percent       0.00%      
2021 PSU Awards Based on Leverage Ratio | Maximum              
Stock-based compensation              
Number of PSUs that may vest, as a percent       200.00%      
2022 PSU Awards Based on Leverage Ratio              
Stock-based compensation              
Service period     1 year        
Vesting percentage achieved     200.00%        
Number of performance periods     3        
2022 PSU Awards Based on Leverage Ratio | Minimum              
Stock-based compensation              
Number of PSUs that may vest, as a percent     0.00%        
2022 PSU Awards Based on Leverage Ratio | Maximum              
Stock-based compensation              
Number of PSUs that may vest, as a percent     200.00%        
2022 PSU Awards Based on Leverage Ratio Special              
Stock-based compensation              
Service period     1 year        
Vesting percentage achieved     200.00%        
Number of performance periods     3        
2022 PSU Awards Based on Leverage Ratio Special | Minimum              
Stock-based compensation              
Number of PSUs that may vest, as a percent     0.00%        
2022 PSU Awards Based on Leverage Ratio Special | Maximum              
Stock-based compensation              
Number of PSUs that may vest, as a percent     200.00%        
2023 PSU Awards Based on Leverage Ratio              
Stock-based compensation              
Service period   1 year          
Vesting percentage achieved   200.00%          
Number of performance periods   3          
2023 PSU Awards Based on Leverage Ratio | Minimum              
Stock-based compensation              
Number of PSUs that may vest, as a percent   0.00%          
2023 PSU Awards Based on Leverage Ratio | Maximum              
Stock-based compensation              
Number of PSUs that may vest, as a percent   200.00%