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Employee Benefits - Additional Information (Details) - USD ($)
$ in Millions
 12 Months Ended
Dec. 31, 2024
Dec. 31, 2023
Dec. 31, 2022
Dec. 31, 2021
Defined Benefit Plan Disclosure [Line Items]        
Pre-tax AOCI not yet recognized as net pension cost   $ 384 $ 385  
Accumulated benefit obligation for all pension plans   $ 922 $ 965  
Percentage increase or decrease in expected return on plan assets   0.25%    
Estimated increase or decrease in net pension cost   $ 2    
Percentage increase or decrease in assumed discount rate   0.25%    
Estimated change in net pension cost due to discount rate   $ 2    
Expected return on plan assets   4.50% 2.75% 2.75%
Expected return on plan assets on estimating 2023 pension cost   4.50%    
Employer contribution to saving plan   7.00%    
Employer discretionary contribution, required service period   1 year    
Employer discretionary contribution percentage       1.00%
Total expenses associated with saving plan   $ 99 $ 82 $ 119
Pension Plan        
Defined Benefit Plan Disclosure [Line Items]        
Benefits expected to be paid from all funded and unfunded pension plans/other postretirement plans in 2024   89    
Benefits expected to be paid from all funded and unfunded pension plans/other postretirement plans in 2025   87    
Benefits expected to be paid from all funded and unfunded pension plans/other postretirement plans in 2026   84    
Benefits expected to be paid from all funded and unfunded pension plans/other postretirement plans in 2027   81    
Benefits expected to be paid from all funded and unfunded pension plans/other postretirement plans in 2028   79    
Benefits expected to be paid from all funded and unfunded pension plans/other postretirement plans in 2029 through 2033   347    
Accumulated benefit obligation for all pension plans   793 828  
Net periodic benefit cost (credit)   $ 30 $ 27 $ 24
Expected return on plan assets   4.50% 4.50% 2.75%
Discount rate   4.68% 4.85%  
Other Postretirement Benefit Plans        
Defined Benefit Plan Disclosure [Line Items]        
Pre-tax AOCI not yet recognized as net pension cost   $ (20) $ (21)  
Benefits expected to be paid from all funded and unfunded pension plans/other postretirement plans in 2024   5    
Benefits expected to be paid from all funded and unfunded pension plans/other postretirement plans in 2025   5    
Benefits expected to be paid from all funded and unfunded pension plans/other postretirement plans in 2026   5    
Benefits expected to be paid from all funded and unfunded pension plans/other postretirement plans in 2027   4    
Benefits expected to be paid from all funded and unfunded pension plans/other postretirement plans in 2028   4    
Benefits expected to be paid from all funded and unfunded pension plans/other postretirement plans in 2029 through 2033   19    
Net periodic benefit cost (credit)   $ (2) $ (2) $ (2)
Expected return on plan assets   4.50% 4.50% 4.50%
Age of employees under condition one   55 years    
Period of service under condition one   5 years    
Age of employees under condition two   50 years    
Period of service under condition two   15 years    
Minimum period of service at the time of termination hired before 2001   15 years    
Discount rate   4.50% 4.50%  
Forecast | Pension Plan        
Defined Benefit Plan Disclosure [Line Items]        
Net periodic benefit cost (credit) $ 11      
Forecast | Other Postretirement Benefit Plans        
Defined Benefit Plan Disclosure [Line Items]        
Net periodic benefit cost (credit) $ 2      
Minimum        
Defined Benefit Plan Disclosure [Line Items]        
Employees contribution to saving plan   1.00%    
Maximum        
Defined Benefit Plan Disclosure [Line Items]        
Employees contribution to saving plan   100.00%