v3.24.4
Summary of Significant Accounting Policies (Details)
$ in Millions, € in Billions
 12 Months Ended
Dec. 31, 2024
USD ($)
reporting_unit
Dec. 31, 2023
USD ($)
Dec. 31, 2022
USD ($)
Dec. 13, 2024
USD ($)
May 08, 2024
EUR (€)
Sep. 06, 2023
USD ($)
Sep. 08, 2022
USD ($)
Sep. 06, 2022
USD ($)
New Accounting Pronouncements or Change in Accounting Principle [Line Items]                
Number of reporting units | reporting_unit 1              
Other finance liabilities | €         € 2.0      
Term of contract 1 month              
Federal Universal Service Fund and other fees $ 386 $ 317 $ 185          
Financing option, devices and accessories, interest rate (percent) 0.00%              
Financing option, devices and accessories, payment period 24 months              
Average amortization period, deferred contract costs (in months) 24 months              
(Gain) loss on disposal group held for sale $ 0 25 (1,087)          
Impairment expense 0 0 477          
Advertising expense 3,100 2,500 2,300          
2022 Stock Repurchase Program                
New Accounting Pronouncements or Change in Accounting Principle [Line Items]                
Stock repurchase program, authorized amount             $ 14,000  
2023-2024 Stockholder Return Program                
New Accounting Pronouncements or Change in Accounting Principle [Line Items]                
Stock repurchase program, authorized amount           $ 19,000    
2025 Stockholder Return Program                
New Accounting Pronouncements or Change in Accounting Principle [Line Items]                
Stock repurchase program, authorized amount       $ 14,000        
Disposal Group, Disposed of by Sale, Not Discontinued Operations | Business Contact                
New Accounting Pronouncements or Change in Accounting Principle [Line Items]                
(Gain) loss on disposal group held for sale     1,100          
Disposal Group, Disposed of by Sale, Not Discontinued Operations | Wireline Business                
New Accounting Pronouncements or Change in Accounting Principle [Line Items]                
Transaction fees payable               $ 700
Monthly installments due in year one               350
Monthly installments due thereafter               $ 350
Monthly installments (in period)               42 months
Disposal Group, Disposed of by Sale, Not Discontinued Operations | Wireline Business | Other current liabilities                
New Accounting Pronouncements or Change in Accounting Principle [Line Items]                
Disposal group, fees payable 100 183            
Disposal Group, Disposed of by Sale, Not Discontinued Operations | Wireline Business | Other long-term liabilities                
New Accounting Pronouncements or Change in Accounting Principle [Line Items]                
Disposal group, fees payable $ 168 $ 255            
Sprint                
New Accounting Pronouncements or Change in Accounting Principle [Line Items]                
Total term of agreement 30 years              
Sprint | Wireline Business                
New Accounting Pronouncements or Change in Accounting Principle [Line Items]                
Impairment expense     $ 477          
Sprint | Spectrum Licenses                
New Accounting Pronouncements or Change in Accounting Principle [Line Items]                
Fixed period 15 years              
Minimum | Sprint                
New Accounting Pronouncements or Change in Accounting Principle [Line Items]                
Agreements with educational and certain non-profit institutions, term 5 years              
Minimum | EIP Securitization Arrangement                
New Accounting Pronouncements or Change in Accounting Principle [Line Items]                
Equipment installment plan, maximum payment term 24 months              
Maximum | Sprint                
New Accounting Pronouncements or Change in Accounting Principle [Line Items]                
Agreements with educational and certain non-profit institutions, term 10 years