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Deferred Charges and Other Assets | 12 Months Ended
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Dec. 31, 2020
Deferred Costs, Capitalized, Prepaid, and Other Assets Disclosure [Abstract] |
DEFERRED CHARGES AND OTHER ASSETS | 8. DEFERRED CHARGES AND OTHER ASSETS “Deferred charges and other assets, net” consisted of the following (in millions):
| December 31,
| 2020 |  | 2019
Deferred turnaround and catalyst costs, net | $ | 1,703 |  |  | $ | 1,778 |
Operating lease ROU assets, net (see Note 6) | 1,204 |  |  | 1,329 |
Investments in unconsolidated joint ventures | 972 |  |  | 942 |
Income taxes receivable | 589 |  |  | 525 |
Intangible assets, net | 248 |  |  | 283 |
Goodwill | 260 |  |  | 260 |
Other | 565 |  |  | 514 |
Deferred charges and other assets, net | $ | 5,541 |  |  | $ | 5,631 |
Amortization expense for deferred turnaround and catalyst costs and intangible assets was $748 million, $759 million, and $668 million for the years ended December 31, 2020, 2019, and 2018, respectively.

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- Definition Tabular disclosure of the amounts paid in advance for capitalized costs that will be expensed with the passage of time or the occurrence of a triggering event, and will be charged against earnings within one year or the normal operating cycle, if longer; the aggregate carrying amount of current assets, not separately presented elsewhere in the balance sheet; and other deferred costs. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.17) -URI http://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682 + Details
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