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Commitments and Contingencies, Minimum lease obligations (Details)
$ in Millions
 12 Months Ended
Dec. 31, 2017
USD ($)
Commitments and Contingencies Disclosure [Abstract]  
Operating leases TDS and its subsidiaries have leases for certain plant facilities, office space, retail store sites, cell sites, data centers and data-processing equipment which are accounted for as operating leases. Certain leases have renewal options and/or fixed rental increases. Renewal options that are reasonably assured of exercise are included in determining the lease term. Any rent abatements or lease incentives, in addition to fixed rental increases, are included in the calculation of rent expense and calculated on a straight-line basis over the defined lease term.
Operating Leases Future Minimum Payments Due  
2018 $ 160
2019 149
2020 136
2021 121
2022 106
Thereafter 766
Total 1,438
Operating Leases Future Minimum Receipts  
2018 80
2019 62
2020 35
2021 22
2022 9
Thereafter 6
Total $ 216