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Other Assets
 12 Months Ended
Dec. 31, 2023
Deferred Costs, Capitalized, Prepaid, and Other Assets Disclosure [Abstract]  
Other Assets Other Assets
Other assets consisted of the following (in millions):
December 31,
20232022
Capitalized software costs, net of accumulated amortization$8.4 $15.6 
Grantor trust assets7.5 6.2 
Net pension assets31.2 31.0 
Long-term supplies inventory5.9 4.6 
Hedge contracts assets10.9 39.2 
Other assets17.9 13.5 
Total$81.8 $110.1 

Grantor trust assets consist primarily of cash surrender values in Company-owned life insurance policies held by a trust to be used for the eventual payment of employee deferred compensation. These assets are restricted from Company use until all obligations are satisfied.
The decrease in hedge contracts assets resulted from the termination of a portion of the Company’s interest rate swaps in the year ended December 31, 2023 and due to changes in the fair value of the hedge contracts compared to the year ended December 31, 2022. Refer to Note 15. Derivatives for further information on our hedge contracts.