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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,
2024		December 31,
2023
Deferred turnaround costs, net$1,086.6 $860.8 
Catalyst, net (a)191.1 180.4 
Environmental credits42.5 42.5 
Linefill27.4 27.4 
Pension plan assets 19.4 18.8 
Other12.5 13.1 
Total deferred charges and other assets, net$1,379.5 $1,143.0 
(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 $358.3 million, $314.4 million and $262.0 million for the years ended December 31, 2024, 2023 and 2022, respectively.
Intangible assets - net, included in “Other” above, primarily consists of customer relationships, permits and emission credits. Our net balance as of December 31, 2024 and December 31, 2023 is shown below:
(in millions)December 31,
2024		December 31,
2023
Intangible assets - gross $25.5 $25.5 
Accumulated amortization(17.4)(16.9)
Intangible assets - net$8.1 $8.6