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Leases - Maturities of Expected Lease Revenues (Details) $ in Millions | Mar. 31, 2019 USD ($)
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Leases [Abstract] |
Remainder of 2019 | $ 39
2020 | 49
2021 | 37
2022 | 24
2023 | 12
Thereafter | 3
Total future lease maturities | $ 164

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- References No definition available. + Details
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- Definition Total expected lease revenues. + References No definition available. + Details
Name: | usm_LeaseRevenues
Namespace Prefix: | usm_
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Balance Type: | credit
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- Definition Amount of lease revenues due in remainder of fiscal year following latest fiscal year. + References No definition available. + Details
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- Definition Amount of lease revenues due after fifth fiscal year following latest fiscal year. + References No definition available. + Details
Name: | usm_LeaseRevenuesThereafter
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- Definition Amount of lease revenues due in fifth fiscal year following latest fiscal year. + References No definition available. + Details
Name: | usm_LeaseRevenuesYearFive
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- Definition Amount of lease revenues due in fourth fiscal year following latest fiscal year. + References No definition available. + Details
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- Definition Amount of lease revenues due in third fiscal year following latest fiscal year. + References No definition available. + Details
Name: | usm_LeaseRevenuesYearThree
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Data Type: | xbrli:monetaryItemType
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- Definition Amount of lease revenues due in second fiscal year following the latest fiscal year. + References No definition available. + Details
Name: | usm_LeaseRevenuesYearTwo
Namespace Prefix: | usm_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
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