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Stock-based Compensation Plans - Additional Information (Detail) - USD ($)
$ in Millions
6 Months Ended 12 Months Ended
Dec. 31, 2022
Jun. 30, 2022
Dec. 31, 2022
Dec. 31, 2021
Dec. 31, 2020
Dec. 31, 2019
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]            
Stock options granted during period         7,000,000  
Intrinsic value of stock options outstanding $ 133   $ 133      
Intrinsic value of stock options exercisable 49   49      
Total unrecognized compensation cost related to nonvested stock-based compensation arrangements $ 275   275      
Expected to be recognized in 2023     172      
Expected to be recognized in 2024     87      
Expected to be recognized in 2025     12      
Expected to be recognized in 2026     $ 4      
Future Grants Shares 36,000,000   36,000,000      
Performance Shares            
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]            
Performance shares outstanding 3,900,000   3,900,000      
Performance Shares | Achievement Exceeds Predefined Target | Maximum            
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]            
Performance shares to be awarded as a percentage of total target award     250.00%      
Performance Shares | Achievement Falls Below Threshold            
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]            
Performance shares to be awarded     0      
Restricted Stock            
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]            
Performance shares to be awarded     7,000,000 8,000,000 11,000,000  
Performance shares outstanding 18,000,000   18,000,000 22,000,000 19,000,000 12,000,000
Restricted stock awards, vesting period     3 years      
DSPP            
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]            
Percentage purchase price of stock lower of stock price at beginning or end of plan period at specified intervals 85.00% 92.50%        
Employee Stock Option            
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]            
Stock option maximum term     10 years      
Stock options vesting period     over five years      
Weighted-average remaining contractual life of stock options exercisable, in years     2 years 10 months 24 days