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Debt - Long-term Debt (Details) - USD ($) $ in Millions |  | 12 Months Ended |
--- | --- | --- | ---
May 17, 2021 | Dec. 31, 2021 | Dec. 31, 2020
Long-term debt |  |  |
Principal amount |  | $ 2,796 | $ 2,572
Unamortized discount and debt issuance costs |  | 65 | 81
Total long-term debt |  | 2,731 | 2,491
Current portion of long-term debt |  | 3 | 2
Long-term debt, net |  | 2,728 | 2,489
Long-term debt maturities |  |  |
Scheduled principal payments 2022 |  | 3 |
Scheduled principal payments 2023 |  | 3 |
Scheduled principal payments 2024 |  | 3 |
Scheduled principal payments 2025 |  | 3 |
Scheduled principal payments 2026 |  | $ 3 |
6.7% Senior Notes |  |  |
Long-term debt |  |  |
Interest rate on debt |  | 6.70% |
Redemption price, percentage |  | 100.00% |
Principal amount |  | $ 544 | 544
Long term debt |  | 532 | 531
Unamortized discount and debt issuance costs |  | $ 12 | 13
6.95% Senior Notes |  |  |
Long-term debt |  |  |
Interest rate on debt |  | 6.95% |
Principal amount |  | $ 0 | 342
Long term debt |  | 0 | 331
Unamortized discount and debt issuance costs |  | $ 0 | 11
7.25% 2063 Senior Notes |  |  |
Long-term debt |  |  |
Interest rate on debt |  | 7.25% |
Principal amount |  | $ 0 | 275
Long term debt |  | 0 | 265
Unamortized discount and debt issuance costs |  | $ 0 | 10
7.25% 2064 Senior Notes |  |  |
Long-term debt |  |  |
Interest rate on debt |  | 7.25% |
Principal amount |  | $ 0 | 300
Long term debt |  | 0 | 290
Unamortized discount and debt issuance costs |  | $ 0 | 10
6.25% Senior Notes |  |  |
Long-term debt |  |  |
Interest rate on debt |  | 6.25% |
Principal amount |  | $ 500 | 500
Long term debt |  | 483 | 483
Unamortized discount and debt issuance costs |  | $ 17 | 17
5.50% Senior Notes |  |  |
Long-term debt |  |  |
Interest rate on debt |  | 5.50% |
Principal amount |  | $ 500 | 500
Long term debt |  | 483 | 483
Unamortized discount and debt issuance costs |  | $ 17 | 17
5.50% Senior Notes |  |  |
Long-term debt |  |  |
Interest rate on debt | 5.50% | 5.50% |
Redemption price, percentage | 100.00% |  |
Principal amount | $ 500 | $ 500 | 0
Debt issuance costs | 16 |  |
Long term debt | $ 484 | 484 | 0
Unamortized discount and debt issuance costs |  | $ 16 | 0
Callable Notes |  |  |
Long-term debt |  |  |
Redemption price, percentage |  | 100.00% |
Write-off of unamortized debt issuance costs |  | $ 31 |
UScellular Term loan agreement |  |  |
Long-term debt |  |  |
Principal amount |  | 299 | 83
Long term debt |  | 296 | 80
Unamortized discount and debt issuance costs |  | 3 | 3
Receivables securitization facility |  |  |
Long-term debt |  |  |
Principal amount |  | 450 | 25
Long term debt |  | 450 | 25
Unamortized discount and debt issuance costs |  | 0 | 0
Finance lease obligations |  |  |
Long-term debt |  |  |
Principal amount |  | 3 | 3
Unamortized discount and debt issuance costs |  | 0 | 0
Finance lease obligations |  | $ 3 | $ 3
Treasury Rate | 6.7% Senior Notes |  |  |
Long-term debt |  |  |
Contractual spread |  | 0.30% |

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