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OTHER ASSETS | 12 Months Ended
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Dec. 31, 2018
Other Assets [Abstract] |
Other Assets Disclosure | OTHER ASSETS The components of other assets follow:
| December 31,
| 2018 |  | 2017
Disputed tax assessments:a |  |  |
PT-FI | $ | 493 |  |  | $ | 417 |
Cerro Verde | 183 |  |  | 185 |
Long-term receivable for taxes b | 260 |  |  | 445 |
Intangible assets c | 398 |  |  | 307 |
Investments: |  |  |
Assurance bond d | 126 |  |  | 123 |
PT Smelting e | 125 |  |  | 61 |
Fixed income and equity securities | 29 |  |  | 30 |
Other | 36 |  |  | 48 |
Contingent consideration associated with sales of assets f | 189 |  |  | 234 |
Legally restricted funds g | 181 |  |  | 189 |
Rio Tinto’s share of ARO | — |  |  | 68 |
Long-term employee receivables | 20 |  |  | 20 |
Other | 132 |  |  | 146 |
Total other assets | $ | 2,172 |  |  | $ | 2,273 |
a. | Refer to Note 12 for further discussion.
b. | Includes tax overpayments and refunds not expected to be realized within the next 12 months (primarily associated with U.S. tax reform, refer to Note 11).
c. | Indefinite-lived intangible assets totaled $215 million at December 31, 2018 and 2017. Accumulated amortization of definite-lived intangible assets totaled $51 million at December 31, 2018, and $46 million at December 31, 2017.
d. | Relates to PT-FI’s commitment for the development of a new smelter in Indonesia (refer to Note 13 for further discussion).
e. | PT-FI’s 25 percent ownership in PT Smelting (smelter and refinery in Gresik, Indonesia) is recorded using the equity method. Amounts were reduced by unrecognized profits on sales from PT-FI to PT Smelting totaling $11 million at December 31, 2018, and $68 million at December 31, 2017. Trade accounts receivable from PT Smelting totaled $176 million at December 31, 2018, and $308 million at December 31, 2017.
f. | Refer to Note 2 for further discussion.
g. | Includes $180 million at December 31, 2018 and 2017, held in trusts for AROs related to properties in New Mexico (refer to Note 12 for further discussion).

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