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Other Assets and Other Liabilities
 12 Months Ended
Dec. 31, 2021
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):
20212020
Inventory
$52.0 $64.3 
Prepaid items
42.0 18.9 
Office furniture, fixtures and other equipment, net of accumulated depreciation
30.2 32.2 
Prepaid pension
28.6 16.0 
Derivatives
8.9 6.4 
Assets held for sale
3.8 4.8 
Deferred financing costs
2.8 3.0 
Other
96.7 84.7 
Total other assets
$265.0 $230.3 

The following table shows the components of other liabilities reported on our balance sheets as of December 31 (in millions):
20212020
Accrued pension and other post-retirement benefits$68.3 $82.0 
Environmental accruals3.5 10.6 
Derivatives0.3 — 
Other40.3 43.0 
Total other liabilities$112.4 $135.6