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Supplemental Balance Sheet Information
3 Months Ended
Mar. 31, 2021
Organization, Consolidation and Presentation of Financial Statements [Abstract]  
Supplemental Balance Sheet Information Supplemental Balance Sheet Information
Accounts Receivable
Accounts receivable consist of the following (in millions):
March 31, 2021December 31, 2020
Accounts receivable$109.5 $113.2 
Allowances and doubtful accounts:
Doubtful accounts(3.9)(4.4)
Sales discounts(0.3)(0.2)
Accounts receivable, net of allowances$105.3 $108.6 
Losses on receivables are estimated based on known troubled accounts and historical experience. Receivables are considered impaired and written off when it is probable that payments due will not be collected. Our provision for doubtful accounts was a net benefit of $0.4 million in the three months ended March 31, 2021.
Inventories
Inventories at the lower of cost (determined on the LIFO/FIFO or weighted-average cost methods) or market consist of the following (in millions):
March 31, 2021December 31, 2020
LIFONon-
LIFO
TotalLIFONon-
LIFO
Total
Raw materials$46.3 $3.0 $49.3 $43.9 $3.1 $47.0 
Work in process32.6 0.1 32.7 32.2 0.1 32.3 
Finished goods67.4 16.0 83.4 73.5 16.9 90.4 
Supplies and other 6.3 6.3 — 6.7 6.7 
146.3 25.4 171.7 149.6 26.8 176.4 
Excess of FIFO or weighted-average cost over LIFO cost(6.5) (6.5)(7.5)— (7.5)
Total
$139.8 $25.4 $165.2 $142.1 $26.8 $168.9 
Property, Plant and Equipment
Property, plant and equipment consists of the following (in millions):
March 31, 2021December 31, 2020
Land$1.1 $1.1 
Buildings46.7 46.8 
Machinery and equipment219.6 218.2 
Construction in progress24.5 23.3 
291.9 289.4 
Less accumulated depreciation(118.5)(114.1)
Total$173.4 $175.3 
Depreciation expense was $5.5 million for the three months ended March 31, 2021 compared to $5.8 million for the three months ended March 31, 2020.
Goodwill and Intangible Assets
The changes in the carrying amount of goodwill are as follows (in millions):
Goodwill
Balance, December 31, 2020$802.5 
Currency translation adjustment(0.4)
Balance, March 31, 2021$802.1 
Intangible assets subject to amortization consist of the following (in millions):
March 31, 2021December 31, 2020
Gross
Carrying
Amount
Accumulated
Amortization
Net Carrying AmountGross
Carrying
Amount
Accumulated
Amortization
Net Carrying Amount
Trademarks$90.9 $(61.9)$29.0 $90.9 $(61.2)$29.7 
Patents and acquired technologies281.5 (179.4)102.1 282.0 (177.2)104.8 
Other61.3 (38.8)22.5 61.4 (38.2)23.2 
Total$433.7 $(280.1)$153.6 $434.3 $(276.6)$157.7 
Amortization expense for intangible assets was $4.2 million for the three months ended March 31, 2021 compared to $4.8 million for the three months ended March 31, 2020.
We estimate amortization expense for the remainder of 2021 and the following four years and beyond will be (in millions):
Amount
Remainder of 2021$12.3 
202216.1 
202315.2 
202415.1 
202514.6 
Thereafter80.3 
Total$153.6 
Accrued Expenses
Accrued expenses consist of the following (in millions):
March 31, 2021December 31, 2020
Accrued rebates and customer incentives$19.4 $22.5 
Accrued salaries and wages21.3 36.0 
Accrued taxes3.4 2.7 
Other(a)
36.2 22.0 
Total$80.3 $83.2 
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(a)As of March 31, 2021, “Other” includes amounts accrued pursuant to a potential resolution of a matter with the U.S. Department of Justice, as described in “Commitments and Contingencies” in Note 8 to these condensed consolidated financial statements.
Other Long-Term Liabilities
Other long-term liabilities consist of the following (in millions):
March 31, 2021December 31, 2020
Taxes payable$0.4 $0.4 
Accrued compensation and benefits5.6 5.8 
Other4.9 4.8 
Total$10.9 $11.0