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Property, Plant And Equipment | 12 Months Ended
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Dec. 31, 2015
Property, Plant and Equipment [Abstract] |
Property, Plant and Equipment | Property, Plant and Equipment The components of our property, plant and equipment balance are as follows:
| Estimated Useful Lives in Years |  | December 31,
Dollars in millions |  | 2015 |  | 2014
Land | N/A |  | $ | 7 |  |  | $ | 13 |
Buildings and property improvements | 5 - 44 |  | 140 |  |  | 198 |
Equipment and other | 3 - 25 |  | 374 |  |  | 421 |
Total |  |  | 521 |  |  | 632 |
Less accumulated depreciation |  |  | (352 | ) |  | (385 | )
Net property, plant and equipment |  |  | $ | 169 |  |  | $ | 247 |
See Note 9 to our consolidated financial statements for discussion on asset impairment. In the fourth quarter of 2015, we closed on the sale of our office facility located in Greenford, U.K. for approximately $33 million in net cash proceeds. The sale resulted in a pre-tax gain of $23 million on disposition of assets on our consolidated statements of operations. We also closed on the sale of our office facility located in Birmingham, Alabama for approximately $6 million in net cash proceeds. Depreciation expense was $35 million, $61 million, and $54 million for the years ended December 31, 2015, 2014 and 2013, respectively.

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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=51717284&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=51719941&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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