v3.25.3
Share-Based Compensation (Narrative) (Details)
$ / shares in Units, $ in Millions
3 Months Ended 9 Months Ended 12 Months Ended
Sep. 30, 2025
USD ($)
peerGroup
$ / shares
shares
Mar. 31, 2025
shares
Sep. 30, 2024
$ / shares
shares
Sep. 30, 2025
USD ($)
peerGroup
$ / shares
shares
Sep. 30, 2024
$ / shares
shares
Dec. 31, 2022
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]            
Common stock shares reserved for future issuance (in shares) 21,500,000     21,500,000    
Granted (in shares) 0   0 0 0  
Stock option exercises, net (in shares) 0   0 0 0  
Share price (in dollars per share) | $ / shares $ 88.45     $ 88.45    
Stock options, exercisable (in shares) 806,451   800,000 806,451 800,000  
Options exercisable, weighted average exercise price (in dollars per share) | $ / shares $ 22.23   $ 22.23 $ 22.23 $ 22.23  
Employee stock purchase plan            
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]            
Discount from market price (as a percent) 15.00%   15.00% 15.00% 15.00%  
Common stock shares reserved for future issuance (in shares) 10,300,000     10,300,000    
Maximum percentage of shares purchased from annual compensation       10.00%    
Discount given to employees (as a percent)       15.00%    
Restricted stock            
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]            
Total unrecognized compensation cost | $ $ 158     $ 158    
Weighted-average period unrecognized compensation cost is expected to be recognized, in years       2 years 3 months 18 days    
Restricted stock | Below Manager Level | First Anniversary            
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]            
Vesting percentage (as a percent)       33.00%    
Restricted stock | Below Manager Level | Second Anniversary            
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]            
Vesting percentage (as a percent)       33.00%    
Restricted stock | At or Above Manager Level | Second Anniversary            
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]            
Vesting percentage (as a percent)       33.00%    
Restricted stock | At or Above Manager Level | Third Anniversary            
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]            
Vesting percentage (as a percent)       33.00%    
PSUs | Three-Year Program            
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]            
Performance period       3 years 3 years 3 years
Maximum payout (as a percent)       100.00%    
Additional units granted above target (in shares)   32,802        
Total unrecognized compensation cost | $ $ 96     $ 96    
Weighted-average period unrecognized compensation cost is expected to be recognized, in years       1 year 3 months 18 days    
Number of peer groups (in peer groups) | peerGroup 2     2    
Performance-based long-term incentive program weighted percentage       50.00%    
PSUs | Three-Year Program | Minimum            
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]            
Minimum payout (as a percent)       0.00%    
PSUs | Three-Year Program | Maximum            
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]            
Maximum payout (as a percent)       200.00%    
PSUs | Executive Officer | Two-year PSU            
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]            
Performance period       2 years    
Vesting period/performance-based non-qualified stock options employment agreement.       1 year    
PSUs | Executive Officer | Two-year PSU | Minimum            
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]            
Minimum payout (as a percent)       0.00%    
PSUs | Executive Officer | Two-year PSU | Maximum            
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]            
Maximum payout (as a percent)       200.00%