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Fair Value Measurements (Tables) | 6 Months Ended
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Jun. 30, 2018
Fair Value Disclosures [Abstract] |
Fair Value, Assets Measured on Recurring Basis | The following tables summarize the valuation of our assets and liabilities measured at fair value on a recurring and non-recurring basis at June 30, 2018 and December 31, 2017 are as follows:
|  |  |  |  |  | Fair Value
Millions of dollars |  | Total Cost Basis |  | Level 1 |  | Level 2 |  | Total
Measured at fair value on a recurring basis: |  | 2018 |  | 2017 |  | 2018 |  | 2017 |  | 2018 |  | 2017 |  | 2018 |  | 2017
Money market funds(1) |  | $ | 396 |  |  | $ | 255 |  |  | $ | 8 |  |  | $ | 2 |  |  | $ | 388 |  |  | $ | 253 |  |  | $ | 396 |  |  | $ | 255 |
Net derivative contracts |  | — |  |  | — |  |  | — |  |  | — |  |  | (45 | ) |  | (66 | ) |  | (45 | ) |  | (66 | )
Available for sale investments |  | 7 |  |  | 6 |  |  | 20 |  |  | 22 |  |  | — |  |  | — |  |  | 20 |  |  | 22 |
Held-to-maturity investments (2) |  | — |  |  | 60 |  |  | — |  |  | — |  |  | — |  |  | 60 |  |  | — |  |  | 60 |
(1) Money market funds are comprised primarily of government obligations or time deposits with banks and other first tier obligations. (2) Held-to-maturity investments are primarily comprised of certificates of deposit with an approximate maturity term of less than six months.
Fair Value Measurements, Nonrecurring |
| Fair Value
Millions of dollars | Level 3
Measured at fair value on a non-recurring basis: | 2018 | 2017
Assets: |  |
Goodwill (3) | $ | 315 |  | $ | — |
Indefinite-lived intangible assets (4) | 384 |  | — |
Definite-lived intangible assets (5) | — |  | — |
Total level 3 assets | $ | 699 |  | $ | — |
(3) Goodwill with a carrying amount of $894 million was written down to a fair value of $315 million resulting in a goodwill impairment charge of $579 million. (4) Indefinite-lived intangible assets with a carrying amount of approximately $492 million were written down to a fair value of $384 million resulting in an impairment charge of $108 million. (5) A definite-lived intangible asset with a carrying amount of approximately $60 million was written down to a fair value of $0 million resulting in an impairment charge of $60 million.

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- Definition Tabular disclosure of assets and liabilities by class, including financial instruments measured at fair value that are classified in shareholders' equity, if any, that are measured at fair value on a nonrecurring basis in periods after initial recognition (for example, impaired assets). Disclosures may include, but are not limited to: (a) the fair value measurements recorded and the reasons for the measurements and (b) the level within the fair value hierarchy in which the fair value measurements are categorized in their entirety (levels 1, 2, 3). + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 820 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=99377789&loc=d3e19207-110258 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 (bbb) -URI http://asc.fasb.org/extlink&oid=99377789&loc=d3e19207-110258 Reference 3: 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=99377789&loc=d3e19207-110258 Reference 4: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 820 -SubTopic 10 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=99377789&loc=d3e19190-110258 + Details
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- Definition Tabular disclosure of assets and liabilities, including [financial] instruments measured at fair value that are classified in stockholders' equity, if any, that are measured at fair value on a recurring basis. The disclosures contemplated herein include the fair value measurements at the reporting date by the level within the fair value hierarchy in which the fair value measurements in their entirety fall, segregating fair value measurements using quoted prices in active markets for identical assets (Level 1), significant other observable inputs (Level 2), and significant unobservable inputs (Level 3). + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 820 -SubTopic 10 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=99377789&loc=d3e19190-110258 + Details
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