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Revenue from Contracts with Customers - Narrative (Details) - USD ($) $ in Millions | 3 Months Ended |  |
--- | --- | --- | ---
Mar. 31, 2019 | Dec. 31, 2018 | Jan. 01, 2018
New Accounting Pronouncements or Change in Accounting Principle [Line Items] |  |  |
Management fee, percentage | 8.00% |  |
Service fee retained by Sprint | 8.60% |  |
Management fee on prepaid wireless revenues and costs | 6.00% |  |
Wireless contract asset balance | $ 70.4 | $ 65.7 | $ 51.1
Payments increasing wireless contract asset balance | 18.2 |  |
Amortization to reduce revenue | $ 13.5 |  |
Cable |  |  |
New Accounting Pronouncements or Change in Accounting Principle [Line Items] |  |  |
Installation revenue, recognition period | 10 months |  |
Commissions and other costs, recognition period (in months) | 44 months |  |
Wireline |  |  |
New Accounting Pronouncements or Change in Accounting Principle [Line Items] |  |  |
Installation revenue, recognition period | 11 months |  |
Commissions and other costs, recognition period (in months) | 72 months |  |
Minimum |  |  |
New Accounting Pronouncements or Change in Accounting Principle [Line Items] |  |  |
Reimbursement payment, cost of equipment and commissions, benefit period for recognition | 21 months |  |
Maximum |  |  |
New Accounting Pronouncements or Change in Accounting Principle [Line Items] |  |  |
Reimbursement payment, cost of equipment and commissions, benefit period for recognition | 53 months |  |

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Balance Type: | debit
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- Definition Contract with Customer, Reduction in Revenue, Amortization + References No definition available. + Details
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- Definition Postpaid wireless service fee as a deduction from gross revenues. + References No definition available. + Details
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- Definition Prepaid wireless service fee percentage retained by Sprint. + References No definition available. + Details
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- Definition Amount, after allowance for credit loss, of right to consideration in exchange for good or service transferred to customer when right is conditioned on something other than passage of time. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 606 -SubTopic 10 -Section 45 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=82913815&loc=SL49130531-203044 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 606 -SubTopic 10 -Section 50 -Paragraph 8 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=109196051&loc=SL49130549-203045 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 606 -SubTopic 10 -Section 45 -Paragraph 3 -URI http://asc.fasb.org/extlink&oid=82913815&loc=SL49130533-203044 + Details
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