v3.25.1
Debt - Term Loan Agreement (Details) - USD ($)
$ in Millions
Apr. 01, 2025
Mar. 31, 2025
Subsequent event | Contingent event | TDS Secured Term Loan | Minimum    
Debt Instrument [Line Items]    
License sale agreement amount $ 1,100  
TDS Secured Term Loan    
Debt Instrument [Line Items]    
Maximum borrowing capacity   $ 300
Amount borrowed and outstanding   300
TDS Term Loan Agreements    
Debt Instrument [Line Items]    
Maximum borrowing capacity   875
Amount borrowed and outstanding   783
Amount available for use   75
UScellular Term Loan 1    
Debt Instrument [Line Items]    
Maximum borrowing capacity   300
UScellular Term Loan Agreements    
Debt Instrument [Line Items]    
Maximum borrowing capacity   800
Amount borrowed and outstanding   $ 718