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Employee Benefit Plans (Principal Components of Employee Benefit Costs) (Detail) - USD ($)
$ in Millions
 12 Months Ended
Dec. 31, 2022
Dec. 31, 2021
Dec. 31, 2020
Employee Benefit Plan Disclosure [Line Items]      
Pension and Other Postretirement Benefits Cost (Reversal of Cost) $ 35 $ 109 $ 60
Savings Plan      
Employee Benefit Plan Disclosure [Line Items]      
Savings plan 37 74 32
Unfunded Supplemental Benefit Plans      
Employee Benefit Plan Disclosure [Line Items]      
Employee benefit plan expenses 12 11 9
Other Plans, Net      
Employee Benefit Plan Disclosure [Line Items]      
Other plans, net [1] $ (14) $ 24 $ 19
[1] For the year ended December 31, 2022, participant investments included in the deferred compensation plan realized losses in excess of expenses recorded by the Company.