v3.26.1
Debt - Narrative (Details)
3 Months Ended 6 Months Ended
Jun. 30, 2026
USD ($)
Jun. 30, 2025
USD ($)
Jun. 30, 2026
USD ($)
Jun. 30, 2025
USD ($)
Feb. 05, 2026
USD ($)
Jan. 31, 2026
Debt Instrument [Line Items]            
Effective interest rate 4.30% 4.10% 4.20% 4.10%    
Weighted-average debt outstanding during period $ 85,100,000,000 $ 83,500,000,000 $ 85,900,000,000 $ 81,700,000,000    
Principal Issuances 6,437,000,000   6,437,000,000      
Debt instrument, collateral amount 198,000,000   198,000,000      
Notes Payable, Other Payables            
Debt Instrument [Line Items]            
Principal Issuances 1,000,000,000.0   1,000,000,000.0   $ 1,000,000,000.0  
Revolving Credit Facility            
Debt Instrument [Line Items]            
Financial maintenance covenant           4.5
Credit facility outstanding balance 0   0      
ABS Notes            
Debt Instrument [Line Items]            
Proceeds from loan facility 2,000,000,000   2,000,000,000      
Gross EIP receivables 2,600,000,000   2,600,000,000      
Principal Issuances 500,000,000   500,000,000      
Line of Credit | Revolving Credit Facility            
Debt Instrument [Line Items]            
Financing commitment, amount 10,000,000,000.0   10,000,000,000.0      
Line of Credit | Letter of Credit            
Debt Instrument [Line Items]            
Financing commitment, amount 1,500,000,000   1,500,000,000      
Line of Credit | Bridge Loan            
Debt Instrument [Line Items]            
Financing commitment, amount $ 500,000,000   $ 500,000,000