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Other Assets and Other Liabilities
 12 Months Ended
Dec. 31, 2020
Other Assets and Other Liabilities [Abstract]  
Other Assets and Other Liabilities Other Assets and Other Liabilities
The following table shows the components of other assets reported on our balance sheets as of December 31 (in millions):
20202019
Inventory
$64.3 $59.4 
Office furniture, fixtures and other equipment, net of accumulated depreciation
32.2 34.4 
Prepaid items
18.9 21.5 
Prepaid pension
16.0 11.0 
Derivatives
6.4 8.5 
Assets held for sale
4.8 3.4 
Deferred financing costs
3.0 2.6 
Other
84.7 80.2 
Total other assets
$230.3 $221.0 

The following table shows the components of other liabilities reported on our balance sheets as of December 31 (in millions):
20202019
Accrued pension and other post-retirement benefits$82.0 $78.3 
Environmental accruals10.6 14.4 
Derivatives— 13.6 
Other43.0 32.8 
Total other liabilities$135.6 $139.1