v3.26.1
Acquisitions and Divestitures - Narrative (Details)
$ / shares in Units, $ in Millions
 1 Months Ended 3 Months Ended 6 Months Ended
Jun. 28, 2026
USD ($)
Jun. 01, 2026
USD ($)
Jan. 20, 2026
USD ($)
state
$ / shares
Jul. 31, 2026
USD ($)
Jun. 30, 2026
USD ($)
state
Jun. 30, 2025
USD ($)
Jun. 30, 2026
USD ($)
state
segment
Jun. 30, 2025
USD ($)
Jan. 30, 2026
market
Dec. 31, 2025
USD ($)
Business Combination [Line Items]                    
Spectrum licenses         $ 158,159   $ 158,159     $ 157,039
Acquisitions of wireless licenses             1,155 $ 234    
Loss on disposition of business         746 $ 0 $ 746 $ 0    
Number of states in which wireline services are provided | state     31              
Number of reportable segments | segment             2      
Goodwill         30,664   $ 30,664     $ 22,841
Jasper NewCo Limited                    
Business Combination [Line Items]                    
Equity method investment, ownership percentage 50.00%                  
Payments to acquire interest in joint venture $ 625                  
Disposal Group, Held-for-Sale, Not Discontinued Operations | Verizon Contributed Business                    
Business Combination [Line Items]                    
Loss on disposition of business         $ 746   $ 746      
Consumer                    
Business Combination [Line Items]                    
Number of states in which wireline services are provided | state         31   31      
Spectrum Licenses, United States Cellular Corporation (UScellular)                    
Business Combination [Line Items]                    
Asset acquisition, consideration transferred   $ 1,000                
82 Spectrum Licenses                    
Business Combination [Line Items]                    
Spectrum licenses         $ 3,200   $ 3,200      
82 Spectrum Licenses | Subsequent Event                    
Business Combination [Line Items]                    
Acquisitions of wireless licenses       $ 3,100            
Frontier and Starry                    
Business Combination [Line Items]                    
Business combination, aggregate acquired operating revenues, percentage of total operating revenues (less than)         5.00%   5.00%      
Frontier                    
Business Combination [Line Items]                    
Business acquisition, share price (in dollars per share) | $ / shares     $ 38.50              
Cash payment to Frontier's equity holders     $ 9,800              
Cash proceeds from acquisition     335              
Business combination, consideration transferred, liabilities incurred     12,900              
Goodwill     7,759   $ 7,795   $ 7,795      
Business combination, recognized asset acquired, benefit obligation assets     2,500              
Business combination, recognized liability assumed, liability, employee benefit obligations     3,000              
Repayments of assumed debt             12,400      
Business combination, integration and acquisition-related cost, expense         $ 120   $ 381      
Frontier | Customer-Related Intangible Assets                    
Business Combination [Line Items]                    
Finite-lived intangible assets acquired     $ 2,600              
Acquired finite-lived intangible assets, weighted average useful life     9 years              
Frontier | Technology-Based Intangible Assets                    
Business Combination [Line Items]                    
Finite-lived intangible assets acquired     $ 162              
Acquired finite-lived intangible assets, weighted average useful life     3 years              
Frontier | Trade Names                    
Business Combination [Line Items]                    
Finite-lived intangible assets acquired     $ 100              
Acquired finite-lived intangible assets, weighted average useful life     3 years              
Frontier | Consumer                    
Business Combination [Line Items]                    
Goodwill     $ 6,000              
Frontier | Business                    
Business Combination [Line Items]                    
Goodwill     $ 1,800              
Starry Group Holdings, Inc.                    
Business Combination [Line Items]                    
Number of markets serviced | market                 5