Deferred Charges and Other Assets

12 Months Ended

Dec. 31, 2018

Deferred Costs, Capitalized, Prepaid, and Other Assets Disclosure [Abstract]

DEFERRED CHARGES AND OTHER ASSETS

7. DEFERRED CHARGES AND OTHER ASSETS

“Deferred charges and other assets, net” consisted of the following (in millions):

	December 31,
	2018		2017
Deferred turnaround and catalyst costs, net	$	1,749	$	1,520
Income taxes receivable	343		673
Investments in joint ventures	542		530
Intangible assets, net	307		142
Goodwill	260		—
Other	431		501
Deferred charges and other assets, net	$	3,632	$	3,366

Amortization expense for the deferred charges and other assets shown above was $668 million, $650 million, and $575 million for the years ended December 31, 2018, 2017, and 2016, respectively.

The increase in intangible assets, net and goodwill resulted primarily from the Peru Acquisition as described in Note 2.