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Assets and Liabilities Measured at Fair Value (Tables) | 6 Months Ended
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Jun. 30, 2020
Fair Value Disclosures [Abstract] |
Schedule of Carrying Amounts and Estimated Fair Value of Financial Instruments | The following table presents the carrying amounts and estimated fair values of financial instruments held by the Company at June 30, 2020 and December 31, 2019. The fair value of a financial instrument is the amount at which the instrument could be exchanged in a current transaction between willing parties. The table excludes Cash and cash equivalents, Accounts receivable-trade, Restricted cash, and Trade accounts payable and accrued liabilities, all of which had fair values approximating carrying amounts. The fair value of Current and Long-term debt was estimated based on rates offered to the Company at that time for debt of the same maturities. The Company has off-balance sheet exposures relating to certain financial guarantees and letters of credit. The fair value of these, which represents fees associated with obtaining the instruments, was nominal.
|  | At June 30, 2020 |  |  |  | At December 31, 2019 |  |
|  | Carrying |  |  |  | Carrying |  |
(Millions of dollars) |  | Amount |  | Fair Value |  | Amount |  | Fair Value
Financial liabilities |  |  |  |  |  |  |  |
Current and long-term debt |  | $ | (1,026.5) |  |  | $ | (1,044.4) |  |  | $ | (1,038.1) |  |  | $ | (1,069.4) |

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- Definition Tabular disclosure of the fair value of financial instruments, including financial assets and financial liabilities, and the measurements of those instruments, assets, and liabilities. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 825 -SubTopic 10 -Section 50 -Paragraph 11 -URI http://asc.fasb.org/extlink&oid=118260190&loc=d3e13467-108611 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 820 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=117815213&loc=d3e19207-110258 + Details
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