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Property Plant And Equipment | 12 Months Ended
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Dec. 31, 2016
Property, Plant and Equipment [Abstract] |
Property, Plant and Equipment | Note 9 Property, Plant and Equipment TDS’ Property, plant and equipment in service and under construction, and related accumulated depreciation and amortization, as of December 31, 2016 and 2015 were as follows:
| Useful Lives |  |  |  |  |  |
December 31, | (Years) |  | 2016 |  | 2015
(Dollars in millions) |  |  |  |  |  |  |
Land | N/A |  | $ | 54 |  | $ | 55
Buildings | 5-40 |  |  | 511 |  |  | 506
Leasehold and land improvements | 1-30 |  |  | 1,188 |  |  | 1,137
Cable and wire | 15-35 |  |  | 1,740 |  |  | 1,689
Network and switching equipment | 3-13 |  |  | 2,348 |  |  | 2,279
Cell site equipment | 7-25 |  |  | 3,383 |  |  | 3,383
Office furniture and equipment | 3-10 |  |  | 508 |  |  | 587
Other operating assets and equipment | 3-12 |  |  | 187 |  |  | 205
System development | 1-7 |  |  | 1,523 |  |  | 1,459
Work in process | N/A |  |  | 237 |  |  | 220
Total property, plant and equipment, gross |  |  |  | 11,679 |  |  | 11,520
Accumulated depreciation and amortization |  |  |  | (8,124) |  |  | (7,756)
Total property, plant and equipment, net |  |  | $ | 3,555 |  | $ | 3,764
Depreciation and amortization expense totaled $820 million, $811 million and $798 million in 2016, 2015 and 2014, respectively. In 2016, 2015 and 2014, (Gain) loss on asset disposals, net included charges of $27 million, $22 million and $27 million, respectively, related to disposals of assets, trade-ins of older assets for replacement assets and other retirements of assets from service in the normal course of business. During 2016, TDS recorded an out-of-period adjustment attributable to 2014 and 2015 related to the over-depreciation of certain assets in the Wireline segment. TDS has determined that this adjustment was not material to the prior quarterly or annual periods and also was not material to 2016 results. As a result of this out-of-period adjustment, Depreciation, amortization and accretion expense decreased by $4 million in 2016. This adjustment was made in the second quarter of 2016.

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- Definition The entire disclosure for long-lived, physical assets used in the normal conduct of business and not intended for resale. Includes, but is not limited to, accounting policies and methodology, roll forwards, depreciation, depletion and amortization expense, including composite depreciation, accumulated depreciation, depletion and amortization expense, useful lives and method used, income statement disclosures, assets held for sale and public utility disclosures. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.13-14) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 205 -SubTopic 20 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=64827811&loc=d3e1361-107760 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 360 -SubTopic 10 -Section 50 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=64862545&loc=d3e2921-110230 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 360 -SubTopic 10 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6391035&loc=d3e2868-110229 + Details
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