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Commitments and Contingencies (Details) - USD ($) $ in Millions | Dec. 31, 2021 | Dec. 31, 2020
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Loss Contingency, Estimate [Abstract] |  |
Accrual for legal proceedings and unasserted claims | $ 0 |
Maximum |  |
Loss Contingency, Estimate [Abstract] |  |
Accrual for legal proceedings and unasserted claims |  | $ 1
UScellular |  |
Loss Contingency, Estimate [Abstract] |  |
FCC License Auction, Percent of Bid Credit in Each Auction | 25.00% |

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