Summary of Significant Accounting Policies (Nature of Services and Products) (Details) |
12 Months Ended |
|---|---|
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Dec. 31, 2018
payment
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| Certain Wireless Devices | |
| Disaggregation of Revenue [Line Items] | |
| Equipment installment plan period | 24 months |
| Trade-In Equipment | |
| Disaggregation of Revenue [Line Items] | |
| Number of installment plan payments | 12 |
| X | ||||||||||
- Definition Equipment Installment Plan Payment Term No definition available.
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| X | ||||||||||
- Definition Number of Installment Plan Payments required for right to trade-in handset. No definition available.
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| X | ||||||||||
- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. No definition available.
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| X | ||||||||||
- Details
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| X | ||||||||||
- Details
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