v3.26.1
Additional Financial Information (Summary of Cash Paid for Interest and Taxes) (Details) - USD ($)
$ in Millions
3 Months Ended
Mar. 31, 2026
Mar. 31, 2025
Cash paid (received) during the period for:    
Interest $ 1,936 $ 1,804
Income taxes, net of refunds 1 11
Payments to Acquire Property, Plant and Equipment 4,877 4,277
Interest during construction 42 56
Acquisitions 2,674 20
Cash used in investing activities (4,171) 0
Business Acquisitions    
Cash paid (received) during the period for:    
Acquisitions 1,656 0
Business Acquisitions | Discontinued Operations    
Cash paid (received) during the period for:    
Acquisitions 4,100  
Spectrum Licenses    
Cash paid (received) during the period for:    
Acquisitions 1,018 1
Interest during construction 0 19
Property, Plant and Equipment [Member]    
Cash paid (received) during the period for:    
Payments to Acquire Property, Plant and Equipment 4,835 4,240
Interest during construction $ 42 $ 37