v3.22.0.1
Business Combinations - Narrative (Details) - USD ($)
 12 Months Ended
Jul. 01, 2021
May 28, 2021
Jul. 01, 2020
Apr. 01, 2020
Feb. 20, 2020
Dec. 31, 2021
Dec. 31, 2020
Dec. 31, 2019
Dec. 31, 2018
Business Acquisition [Line Items]                  
Goodwill           $ 12,188,000,000 $ 11,117,000,000    
Uncertain tax benefit reserves           1,217,000,000 1,159,000,000 $ 514,000,000 $ 462,000,000
Payments of consent fees related to long-term debt           0 109,000,000 0  
DISH | T-Mobile and Sprint | Prepaid Business                  
Business Acquisition [Line Items]                  
Payments for asset acquisition     $ 1,400,000,000            
Sprint                  
Business Acquisition [Line Items]                  
Exchange ratio (in shares)       9.75          
Exchange ratio (in shares)       0.10256          
Merger consideration (in shares)       373,396,310          
Value of common stock provided in exchange for acquiree common stock       $ 31,328,000,000          
Fully-diluted shares of combined company held by public stockholders (percent)       31.70%          
Total consideration exchanged       $ 40,827,000,000          
Value of contingent consideration       1,882,000,000          
Contingent consideration, high end of range       7,300,000,000          
Goodwill       9,423,000,000          
Other intangible assets       6,280,000,000          
Goodwill expected to be tax deductible       0          
Spectrum licenses       45,400,000,000          
Deferred tax assets       851,000,000          
Uncertain tax benefit reserves       660,000,000          
Transaction costs           $ 28,000,000 201,000,000 $ 106,000,000  
Total revenue subsequent to Merger date             20,500,000,000    
Operating income subsequent to merger date             1,300,000,000    
Sprint | Senior Notes                  
Business Acquisition [Line Items]                  
Payments for requisite consents to third-party note holders       95,000,000          
Sprint | Secured Bridge Loan Facility                  
Business Acquisition [Line Items]                  
Financing commitment, amount       19,000,000,000          
Sprint | Secured Term Loan Facility                  
Business Acquisition [Line Items]                  
Financing commitment, amount       4,000,000,000          
Sprint | Secured and Unsecured Debt Financing                  
Business Acquisition [Line Items]                  
Payments of consent fees related to long-term debt       355,000,000          
Sprint | Pro Forma                  
Business Acquisition [Line Items]                  
Transaction costs             $ 559,000,000    
Sprint | SoftBank                  
Business Acquisition [Line Items]                  
Value of contingent consideration       200,000,000          
Indemnification assets       200,000,000          
Sprint | DT                  
Business Acquisition [Line Items]                  
Payments for requisite consents to DT       13,000,000          
Sprint | Accounts Receivable                  
Business Acquisition [Line Items]                  
Fair value of receivables acquired       1,800,000,000          
Gross amounts due       1,800,000,000          
Sprint | Equipment installment plan receivables, net of allowance for credit losses and imputed discount                  
Business Acquisition [Line Items]                  
Fair value of receivables acquired       1,300,000,000          
Gross amounts due       1,600,000,000          
Sprint | Customer relationships                  
Business Acquisition [Line Items]                  
Finite-lived, fair value       $ 4,900,000,000          
Weighted average useful life       8 years          
Sprint | Tradenames                  
Business Acquisition [Line Items]                  
Finite-lived, fair value       $ 207,000,000          
Weighted average useful life       2 years          
Sprint | Favorable lease (asset)                  
Business Acquisition [Line Items]                  
Finite-lived, fair value       $ 745,000,000          
Weighted average useful life       18 years          
Sprint | Unfavorable spectrum leases                  
Business Acquisition [Line Items]                  
Finite-lived, fair value       $ 125,000,000          
Weighted average useful life       19 years          
Sprint | DT                  
Business Acquisition [Line Items]                  
Fully-diluted shares expected to be held immediately following merger (percent)       43.60%          
Sprint | SoftBank                  
Business Acquisition [Line Items]                  
Fully-diluted shares expected to be held immediately following merger (percent)       24.70%          
Sprint | Common Stock                  
Business Acquisition [Line Items]                  
Exchange ratio (in shares)         11.00        
Sprint | Common Stock | SoftBank                  
Business Acquisition [Line Items]                  
Aggregate surrendered (in shares)         48,751,557        
Exchange ratio (in shares)         11.31        
Volume-weighted average price (in USD per share)         $ 150.00        
Number of shares issued if threshold not met (in shares)         0        
Shentel                  
Business Acquisition [Line Items]                  
Total consideration exchanged $ 1,886,000,000                
Goodwill 1,035,000,000                
Other intangible assets $ 770,000,000                
Weighted average useful life 9 years                
Agreement price   $ 1,900,000,000              
Cash consideration $ 2,000,000,000