5.	DEFERRED CHARGES AND OTHER ASSETS, NET

Deferred charges and other assets, net consisted of the following:


(in millions)	December 31, 2019		December 31, 2018
Deferred turnaround costs, net	$	722.7	$	673.1
Catalyst, net		132.7		124.3
Environmental credits		37.8		37.8
Finance lease assets		24.2		—
Linefill		19.5		19.5
Pension plan assets		10.3		9.7
Intangible assets, net		0.5		0.5
Other		6.5		6.9

Total deferred charges and other assets, net	$	954.2	$	871.8

Catalyst, net includes $74.5 million and $73.1 million of indefinitely-lived precious metal catalysts as of December 31, 2019 and December 31, 2018, respectively.

The Company recorded amortization expense related to deferred turnaround costs, catalyst and intangible assets of $256.8 million, $207.2 million and $144.0 million for the years ended December 31, 2019, 2018 and 2017, respectively.

Intangible assets, net primarily consists of permits and emission credits. Our net balance as of December 31, 2019 and December 31, 2018 is shown below.


(in millions)	December 31, 2019			December 31, 2018
Intangible assets - gross	$	4.0		$	4.0
Accumulated amortization		(3.5	)		(3.5	)

Intangible assets - net	$	0.5		$	0.5