Read the following texts and table with financial data from an S&P 500 earnings report carefully.Based on the question-answer history (if provided), answer the last question. The answer may require mathematical calculation based on the data provided.

Text: eog utilized average prices per acre from comparable market transactions and estimated discounted cash flows as the basis for determining the fair value of unproved and proved properties , respectively , received in non-cash property exchanges . see note 10 . fair value of debt . at december 31 , 2018 and 2017 , respectively , eog had outstanding $ 6040 million and $ 6390 million aggregate principal amount of senior notes , which had estimated fair values of approximately $ 6027 million and $ 6602 million , respectively . the estimated fair value of debt was based upon quoted market prices and , where such prices were not available , other observable ( level 2 ) inputs regarding interest rates available to eog at year-end . 14 . accounting for certain long-lived assets eog reviews its proved oil and gas properties for impairment purposes by comparing the expected undiscounted future cash flows at a depreciation , depletion and amortization group level to the unamortized capitalized cost of the asset . the carrying values for assets determined to be impaired were adjusted to estimated fair value using the income approach described in the fair value measurement topic of the asc . in certain instances , eog utilizes accepted offers from third-party purchasers as the basis for determining fair value . during 2018 , proved oil and gas properties with a carrying amount of $ 139 million were written down to their fair value of $ 18 million , resulting in pretax impairment charges of $ 121 million . during 2017 , proved oil and gas properties with a carrying amount of $ 370 million were written down to their fair value of $ 146 million , resulting in pretax impairment charges of $ 224 million . impairments in 2018 , 2017 and 2016 included domestic legacy natural gas assets . amortization and impairments of unproved oil and gas property costs , including amortization of capitalized interest , were $ 173 million , $ 211 million and $ 291 million during 2018 , 2017 and 2016 , respectively . 15 . asset retirement obligations the following table presents the reconciliation of the beginning and ending aggregate carrying amounts of short-term and long-term legal obligations associated with the retirement of property , plant and equipment for the years ended december 31 , 2018 and 2017 ( in thousands ) : . <table class='wikitable'><tr><td>1</td><td>-</td><td>2018</td><td>2017</td></tr><tr><td>2</td><td>carrying amount at beginning of period</td><td>$ 946848</td><td>$ 912926</td></tr><tr><td>3</td><td>liabilities incurred</td><td>79057</td><td>54764</td></tr><tr><td>4</td><td>liabilities settled ( 1 )</td><td>-70829 ( 70829 )</td><td>-61871 ( 61871 )</td></tr><tr><td>5</td><td>accretion</td><td>36622</td><td>34708</td></tr><tr><td>6</td><td>revisions</td><td>-38932 ( 38932 )</td><td>-9818 ( 9818 )</td></tr><tr><td>7</td><td>foreign currency translations</td><td>1611</td><td>16139</td></tr><tr><td>8</td><td>carrying amount at end of period</td><td>$ 954377</td><td>$ 946848</td></tr><tr><td>9</td><td>current portion</td><td>$ 26214</td><td>$ 19259</td></tr><tr><td>10</td><td>noncurrent portion</td><td>$ 928163</td><td>$ 927589</td></tr></table> ( 1 ) includes settlements related to asset sales . the current and noncurrent portions of eog's asset retirement obligations are included in current liabilities - other and other liabilities , respectively , on the consolidated balance sheets. .
Question: what was the value of the carrying amount at the start of 2017?

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912926.0
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