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Investments (Detail) - USD ($)
$ in Millions
12 Months Ended
Dec. 31, 2021
Dec. 31, 2020
Dec. 31, 2019
Debt and Equity Securities, FV-NI [Line Items]      
Investments $ 274 $ 267  
Equity in undistributed earnings losses of subsidiaries 15 8 $ 11
Proceeds from dividends received 9 18 $ 15
Investments in equity affiliates      
Debt and Equity Securities, FV-NI [Line Items]      
Investments 126 120  
Marketable equity securities (See Note 10) | Trading Securities      
Debt and Equity Securities, FV-NI [Line Items]      
Investments 98 97  
Other      
Debt and Equity Securities, FV-NI [Line Items]      
Investments $ 50 $ 50  
Investments In Other Operating Joint Venture | Minimum      
Debt and Equity Securities, FV-NI [Line Items]      
Percentage of ownership interests 20.00%    
Investments In Other Operating Joint Venture | Maximum      
Debt and Equity Securities, FV-NI [Line Items]      
Percentage of ownership interests 50.00%