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Earnings Per Share (Tables) | 12 Months Ended
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Dec. 31, 2016
Earnings Per Share [Abstract] |
Earnings per share | The amounts used in computing earnings (loss) per common share and the effects of potentially dilutive securities on the weighted average number of common shares were as follows:
Year Ended December 31, | 2016 |  | 2015 |  | 2014
(Dollars and shares in millions, except earnings per share) |  |  |  |  |
Basic earnings (loss) per share available to TDS common |  |  |  |  |  |  |  |
shareholders: |  |  |  |  |  |  |  |
Net income (loss) available to TDS common shareholders used in basic earnings (loss) per share | $ | 43 |  | $ | 219 |  | $ | (136)
Adjustments to compute diluted earnings: |  |  |  |  |  |  |  |
| Noncontrolling interest adjustment |  | – |  |  | (1) |  |  | –
Net income (loss) available to TDS common shareholders | $ | 43 |  | $ | 218 |  | $ | (136)
used in diluted earnings (loss) per share
Weighted average number of shares used in basic |  |  |  |  |  |  |  |
| earnings (loss) per share: |  |  |  |  |  |  |  |
|  | Common Shares |  | 103 |  |  | 102 |  |  | 101
|  | Series A Common Shares |  | 7 |  |  | 7 |  |  | 7
|  |  | Total |  | 110 |  |  | 109 |  |  | 108
Effects of dilutive securities 1 |  | 1 |  |  | 1 |  |  | –
Weighted average number of shares used in diluted |  |  |  |  |  |  |  |
| earnings (loss) per share |  | 111 |  |  | 110 |  |  | 108
Basic earnings (loss) per share available to TDS common |  |  |  |  |  |  |  |
| shareholders | $ | 0.39 |  | $ | 2.02 |  | $ | (1.26)
Diluted earnings (loss) per share available to TDS common |  |  |  |  |  |  |  |
| shareholders | $ | 0.39 |  | $ | 1.98 |  | $ | (1.26)
1 | There were no effects of dilutive securities in 2014 due to the net loss for the year.

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- Definition Tabular disclosure of an entity's basic and diluted earnings per share calculations, including a reconciliation of numerators and denominators of the basic and diluted per-share computations for income from continuing operations. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 260 -SubTopic 10 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6371337&loc=d3e3550-109257 + Details
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