Quarterly report [Sections 13 or 15(d)]

Share-Based Compensation - Summary of Activity Under Share-Based Compensation Plans (Detail)

v3.25.1
Share-Based Compensation - Summary of Activity Under Share-Based Compensation Plans (Detail) - USD ($)
$ / shares in Units, shares in Thousands, $ in Millions
 3 Months Ended 12 Months Ended
Mar. 31, 2025
Mar. 31, 2024
Dec. 31, 2024
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Outstanding and nonvested as of December 31, 2024, Number of Shares [1] 6,289    
Granted, Number of Shares [2] 1,408    
Vested, Number of Shares (737)    
Forfeited, Number of Shares (181)    
Outstanding and nonvested as of March 31, 2025, Number of Shares [1] 6,779   6,289
Expected to vest as of March 31, 2025, Number of Shares [3] 6,330    
Outstanding and nonvested as of December 31, 2024, Weighted Average Grant Date Fair Value Per Share [1] $ 12.56    
Granted, Weighted Average Grant Date Fair Value Per Share [2] 8.31    
Vested, Weighted Average Grant Date Fair Value Per Share 25.82    
Forfeited, Weighted Average Grant Date Fair Value Per Share 11.11    
Outstanding and nonvested as of March 31, 2025, Weighted Average Grant Date Fair Value Per Share [1] 10.27   $ 12.56
Expected to vest as of March 31, 2025, Weighted Average Grant Date Fair Value Per Share [3] $ 10.36    
Stock Appreciation Rights (SARs)      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Number of Awards Outstanding, Beginning Balance [4] 11,002    
Granted, Number of Awards 1,079    
Exercised, Number of Awards 0    
Forfeited/Expired Number of Awards [5] (421)    
Number of Awards Outstanding, Ending Balance [4] 11,660   11,002
Number of Awards Exercisable, Ending Balance [6] 3,699    
Number of Awards Vested and expected to vest, Ending Balance [7] 8,075    
Weighted Average Exercise Price Per Award Outstanding, Beginning Balance [4] $ 12.12    
Granted, Weighted Average Exercise Price Per Award 8.31    
Exercised, Weighted Average Exercise Price Per Award 0    
Forfeited/Expired Weighted Average Exercise Price Per Award [5] 15.36    
Weighted Average Exercise Price Per Award Outstanding, Ending Balance [4] 11.65   $ 12.12
Exercisable, Weighted Average Exercise Price Per Award, Ending Balance [6] 16.69    
Weighted Average Exercise Price Per Award, Vested and expected to vest, Ending Balance [7] $ 13.2    
Weighted Average Remaining Contractual Term Outstanding [4] 7 years 4 months 24 days   7 years 1 month 6 days
Exercisable Weighted Average Remaining Contractual Term [6] 6 years 8 months 12 days    
Weighted Average Remaining Contractual Term, Vested and expected to vest [7] 8 years    
Aggregate Intrinsic Value Outstanding [4],[8] $ 2.9   $ 0.0
Exercisable, Aggregate Intrinsic Value [6],[8] 0.3    
Aggregate Intrinsic Value, Vested and expected to vest [7],[8] $ 1.0    
Granted, Weighted Average Grant Date Fair Value Per Share $ 4.52 $ 4.43  
[1] Includes 1.4 million and zero performance-based restricted stock units as of March 31, 2025 and December 31, 2024, respectively, which represents the maximum amount that can vest.
[2] Includes 1.4 million performance-based restricted stock units.
[3] Includes 1.2 million performance-based restricted stock units.
[4] Includes 3.9 million and 4.0 million performance condition SARs as of March 31, 2025 and December 31, 2024, respectively.
[5] Includes 0.1 million performance condition SARs.
[6] Includes 0.4 million performance condition SARs.
[7] Includes 0.4 million performance condition SARs.
[8] The intrinsic value is the amount by which the current market value of the underlying stock exceeds the exercise price of the stock awards.