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Credit Arrangements - Senior Secured Credit Facilities (Detail) - USD ($)
$ in Millions
Apr. 17, 2023
Mar. 31, 2023
Dec. 31, 2022
Line of Credit Facility      
Principal amount of debt   $ 13,222 $ 12,797
Senior Secured Credit Facilities, Fifth Amended and Restated Credit Agreement      
Line of Credit Facility      
Aggregate maximum principal amount   7,632  
Principal amount   6,932  
Senior Secured Credit Facilities, Revolving Credit Facility And Standby Letters Of Credit      
Line of Credit Facility      
Aggregate maximum principal amount   1,500  
Available borrowing capacity   695  
Senior Secured Credit Facilities, Revolving Credit Facility And Standby Letters Of Credit | Subsequent Event      
Line of Credit Facility      
Aggregate maximum principal amount $ 2,000    
Senior Secured Credit Facilities, Revolving Credit Facility And Standby Letters Of Credit | U.S Dollars      
Line of Credit Facility      
Principal amount   675  
Senior Secured Credit Facilities, Revolving Credit Facility And Standby Letters Of Credit | U.S. dollars, Euros, Swiss Francs And Other Foreign Currencies      
Line of Credit Facility      
Principal amount   600  
Senior Secured Credit Facilities, Revolving Credit Facility And Standby Letters Of Credit | US Dollars And Yen      
Line of Credit Facility      
Principal amount   $ 225