v3.20.4
Sales of Certain Receivables - Sales of Service Receivables (Details) - USD ($)
Dec. 31, 2020
Apr. 01, 2020
Dec. 31, 2019
Dec. 31, 2014
Variable Interest Entity [Line Items]        
Other current assets $ 2,496,000,000   $ 1,972,000,000  
Accounts payable and accrued liabilities 10,196,000,000   6,746,000,000  
Other current liabilities 810,000,000   1,673,000,000  
Factoring Arrangement | Variable Interest Entity, Not Primary Beneficiary        
Variable Interest Entity [Line Items]        
Revolving receivables facility, maximum borrowing capacity       $ 950,000,000
Revolving receivables facility, outstanding borrowings 772,000,000   924,000,000  
Other current assets 378,000,000   350,000,000  
Accounts payable and accrued liabilities 0   25,000,000  
Other current liabilities $ 357,000,000   $ 342,000,000  
Sprint | Accounts receivable facility        
Variable Interest Entity [Line Items]        
Total amount outstanding   $ 2,300,000,000