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Income Taxes, Rate Reconciliation (Details) | 12 Months Ended
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Dec. 31, 2016 | Dec. 31, 2015 | Dec. 31, 2014
Income tax rate reconciliation |  |  |  |
Statutory federal income tax rate |  | 35.00% | 35.00% | 35.00%
State income taxes, net of federal benefit | [1] | 3.60% | 2.10% | (20.80%)
Effect of noncontrolling interests |  | (1.10%) | 0.60% | 9.80%
Other differences, net |  | 2.20% | 1.00% | (3.90%)
Total income tax rate |  | 39.70% | 38.70% | 20.10%
[1] | State income taxes, net of federal benefit, include changes in unrecognized tax benefits as well as adjustments to the valuation allowance. During the third quarter of 2014 U.S. Cellular recorded a $6 million increase to income tax expense related to a valuation allowance recorded against certain state deferred tax assets.

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