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DEFERRED CHARGES AND OTHER ASSETS, NET
 12 Months Ended
Dec. 31, 2024
Deferred Costs, Capitalized, Prepaid, and Other Assets Disclosure [Abstract]  
DEFERRED CHARGES AND OTHER ASSETS, NET DEFERRED CHARGES AND OTHER ASSETS, NET
Deferred charges and other assets, net consisted of the following:  
(in millions)December 31, 2024December 31, 2023
Deferred turnaround costs, net$1,082.3 $855.7 
Catalyst, net (a)
190.8 180.1 
Environmental credits42.5 42.5 
Linefill27.4 27.4 
Pension plan assets19.4 18.8 
Other4.8 4.8 
Total deferred charges and other assets, net$1,367.2 $1,129.3 
(a) Catalyst, net includes $115.0 million and $114.2 million of indefinite-lived precious metal catalysts as of December 31, 2024 and December 31, 2023, respectively.
The Company recorded amortization expense related to deferred turnaround costs, catalyst and intangible assets of $357.0 million, $313.5 million and $261.5 million for the years ended December 31, 2024, 2023 and 2022, respectively.
Intangible assets, net, included in “Other” above, primarily consists of permits and emission credits. Our net balance as of December 31, 2024 and December 31, 2023 is shown below:
(in millions)December 31, 2024December 31, 2023
Intangible assets - gross$4.0 $4.0 
Accumulated amortization(3.5)(3.5)
Intangible assets - net $0.5 $0.5