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Debt - Schedule of Long-Term Credit Facilities (Detail) - USD ($)
 12 Months Ended
Dec. 31, 2023
Dec. 31, 2022
Debt Instrument [Line Items]    
Facility Capacity $ 20,500,000,000  
Unused Capacity 9,457,000,000  
Principal Amount Outstanding 6,618,000,000  
Verizon revolving credit facility    
Debt Instrument [Line Items]    
Facility Capacity 9,500,000,000  
Unused Capacity 9,457,000,000  
Principal Amount Outstanding 0  
Amount drawn from credit facilities 0  
Various export credit facilities    
Debt Instrument [Line Items]    
Facility Capacity 11,000,000,000  
Unused Capacity 0  
Principal Amount Outstanding 6,618,000,000  
Amount drawn from credit facilities $ 1,000,000,000 $ 3,000,000,000