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Summary of Significant Accounting Policies (Tables) | 12 Months Ended
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Dec. 31, 2015
Accounting Policies [Abstract] |
Schedule of lives used in computing depreciation for depreciable assets | The lives used in computing depreciation for such assets are as follows:
Asset | Range of Useful Lives, in Years
Improvements to land | 15 to 30
Buildings | 20 to 30
Machinery and equipment | 5 to 30
Automotive equipment | 5 to 15
Furniture and fixtures | 3 to 10
Aircraft | 20
Railcars | 25 to 30
A summary of costs for property, plant, and equipment is as follows:
| December 31,
| 2015 |  | 2014
| (in millions)
Land and improvements | $ | 38.6 |  |  | $ | 37.4 |
Buildings | 53.6 |  |  | 50.4 |
Machinery and equipment | 2,723.0 |  |  | 2,581.2 |
Automotive equipment | 24.8 |  |  | 22.1 |
Furniture and fixtures | 21.3 |  |  | 19.0 |
Leasehold improvements | 3.6 |  |  | 3.4 |
Aircraft | 3.6 |  |  | 3.7 |
Railcars | 16.3 |  |  | 14.5 |
Construction in progress | 122.3 |  |  | 71.5 |
| 3,007.1 |  |  | 2,803.2 |
Accumulated depreciation | 1,040.0 |  |  | 887.2 |
| $ | 1,967.1 |  |  | $ | 1,916.0 |
Schedule of planned major maintenance activity | For the years ended December 31, 2015 and 2014, the Company's petroleum and nitrogen fertilizer segments incurred the following major scheduled turnaround expenses. No major scheduled turnaround expenses were incurred for the year ended December 31, 2013.
| For the Year Ended December 31,
| 2015 |  | 2014
| (in millions)
Petroleum segment |  |  |
Coffeyville refinery(1) | $ | 102.2 |  |  | $ | 5.5 |
Wynnewood refinery(2) | — |  |  | 1.3 |
Nitrogen Fertilizer segment |  |  |
Nitrogen Fertilizer plant(3) | 7.0 |  |  | — |
Total Major Scheduled Turnaround Expenses | $ | 109.2 |  |  | $ | 6.8 |
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(1) | The Coffeyville refinery completed the first phase of its current major scheduled turnaround in mid-November 2015. The second phase is scheduled to begin in late February 2016. During the outage at the Coffeyville refinery as discussed in Note 7 ("Insurance Claims"), the Refining Partnership accelerated certain planned turnaround activities scheduled for 2015 and incurred turnaround expenses for the year ended December 31, 2014.
(2) | During the fluid catalytic cracking unit ("FCCU") outage at the Wynnewood refinery, the Refining Partnership accelerated certain planned turnaround activities previously scheduled for 2016 and incurred turnaround expenses for the year ended December 31, 2014. The next turnaround for the Wynnewood refinery is scheduled to occur in the spring of 2017.
(3) | The Nitrogen Fertilizer Partnership underwent a full facility turnaround in the third quarter of 2015. The Nitrogen Fertilizer Partnership is planning to undergo the next scheduled full facility turnaround in the second half of 2017.

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- Definition Tabular disclosure of physical assets used in the normal conduct of business and not intended for resale. Includes, but is not limited to, balances by class of assets, depreciation and depletion expense and method used, including composite depreciation, and accumulated deprecation. + 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) -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 360 -SubTopic 10 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6391035&loc=d3e2868-110229 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 02 -Paragraph 13 -Subparagraph b -Article 5 + Details
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