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Debt - Tender Offers (Details) - USD ($)
$ in Millions
3 Months Ended 9 Months Ended
Sep. 30, 2025
Jun. 30, 2025
Sep. 30, 2025
Debt Instrument [Line Items]      
Principal Amount Purchased $ 503 $ 503 $ 503
Cash Consideration   $ 501 501
Verizon 1.450%-7.750% Notes Due 2026-2030      
Debt Instrument [Line Items]      
Principal Amount Purchased 503   $ 503
Cash Consideration $ 501    
Verizon 1.450%-7.750% Notes Due 2026-2030 | Minimum      
Debt Instrument [Line Items]      
Debt instrument, interest rate, stated percentage 1.45%   1.45%
Verizon 1.450%-7.750% Notes Due 2026-2030 | Maximum      
Debt Instrument [Line Items]      
Debt instrument, interest rate, stated percentage 7.75%   7.75%