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Property, plant and equipment | 12 Months Ended
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Dec. 31, 2019
Property, Plant and Equipment Disclosure [Abstract] |
Property, Plant and Equipment | PROPERTY, PLANT AND EQUIPMENT The following table summarizes our Property, plant and equipment (in millions):
|  | December 31,
|  | 2019 |  | 2018
Land and land improvements |  | $ | 404 |  |  | $ | 404 |
Buildings and improvements (including leasehold improvements) |  | 3,358 |  |  | 2,344 |
Laboratory and manufacturing equipment |  | 805 |  |  | 697 |
Office and computer equipment |  | 634 |  |  | 558 |
Construction in progress |  | 723 |  |  | 1,194 |
Subtotal |  | 5,924 |  |  | 5,197 |
Less accumulated depreciation and amortization |  | (1,422 | ) |  | (1,191 | )
Total |  | $ | 4,502 |  |  | $ | 4,006 |
Office and computer equipment includes capitalized software. We had unamortized capitalized software costs on our Consolidated Balance Sheets of $108 million and $121 million as of December 31, 2019 and 2018, respectively. Capitalized interest on construction in-progress is included in property, plant and equipment. Interest capitalized in 2019, 2018 and 2017 was not material.

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- Definition Property, Plant and Equipment Disclosure [Abstract] + References No definition available. + Details
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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://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 360 -URI http://asc.fasb.org/topic&trid=2155823 + Details
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