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Basis of Presentation and Summary of Significant Accounting Policies Basis of Presentation and Summary of Significant Accounting Policies (Details 2) $ in Millions |  | 3 Months Ended | 12 Months Ended
--- | --- | --- | ---
Aug. 27, 2015 USD ($) | Dec. 31, 2015 USD ($) state | Sep. 30, 2015 USD ($) | Dec. 31, 2015 USD ($) state
Products and Services Revenues |  |  |  |
Number of states in which entity operates | state |  | 14 |  | 14
Incremental increase in other operating revenues - CAF Phase II |  | $ 31 | $ 64 |
CAF Phase 2 Support | CenturyLink, Inc. |  |  |  |
Products and Services Revenues |  |  |  |
Federal support, total amount per agreement | $ 500 |  |  |
Contract or agreement term (in years) | 6 |  |  |
Number of rural households and businesses | 1,200,000 |  |  |
Number of states in which entity operates | 33 |  |  |
CAF Phase 2 Support | Qwest Corporation |  |  |  |
Products and Services Revenues |  |  |  |
Federal support, total amount per agreement | $ 150 |  |  |
Number of rural households and businesses | 300,000 |  |  |
Number of states in which entity operates | 13 |  |  |
Incremental increase in other operating revenues - CAF Phase II |  |  |  | $ 95

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