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Supplemental Balance Sheet Information (Tables)
 9 Months Ended
Sep. 30, 2021
Organization, Consolidation and Presentation of Financial Statements [Abstract]  
Schedule of accounts receivable Accounts receivable consist of the following (in millions):
September 30, 2021December 31, 2020
Accounts receivable$121.3 $113.2 
Income tax receivable11.6 59.3 
Allowances and doubtful accounts:
Doubtful accounts(3.5)(4.4)
Sales discounts(0.3)(0.2)
Accounts receivable, net of allowances$129.1 $167.9 
Schedule of 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):
September 30, 2021December 31, 2020
LIFONon-
LIFO		TotalLIFONon-
LIFO		Total
Raw materials$44.4 $2.0 $46.4 $43.9 $3.1 $47.0 
Work in process34.8 — 34.8 32.2 0.1 32.3 
Finished goods60.7 17.2 77.9 73.5 16.9 90.4 
Supplies and other— 6.3 6.3 — 6.7 6.7 
139.9 25.5 165.4 149.6 26.8 176.4 
Excess of FIFO or weighted-average cost over LIFO cost(7.0)— (7.0)(7.5)— (7.5)
Total
$132.9 $25.5 $158.4 $142.1 $26.8 $168.9 
Schedule of property, plant and equipment Property, plant and equipment consists of the following (in millions):
September 30, 2021December 31, 2020
Land$1.1 $1.1 
Buildings47.3 46.8 
Machinery and equipment216.4 218.2 
Construction in progress29.3 23.3 
294.1 289.4 
Less accumulated depreciation(124.4)(114.1)
Total$169.7 $175.3 
Schedule of changes in the carrying amount of goodwill by business segment The changes in the carrying amount of goodwill are as follows (in millions):
Goodwill
Balance, December 31, 2020$802.5 
Currency translation adjustment(0.7)
Balance, September 30, 2021$801.8 
Schedule of intangible assets subject to amortization Intangible assets subject to amortization consist of the following (in millions):
September 30, 2021December 31, 2020
Gross
Carrying
Amount		Accumulated
Amortization		Net Carrying AmountGross
Carrying
Amount		Accumulated
Amortization		Net Carrying Amount
Trademarks$90.9 $(63.3)$27.6 $90.9 $(61.2)$29.7 
Patents and acquired technologies271.7 (175.0)96.7 282.0 (177.2)104.8 
Other61.2 (40.2)21.0 61.4 (38.2)23.2 
Total$423.8 $(278.5)$145.3 $434.3 $(276.6)$157.7 
Schedule of estimated amortization expense
Amortization expense for the remainder of 2021 and the following four years and beyond is estimated as follows (in millions):
Amount
Remainder of 2021$4.1 
202216.1 
202315.2 
202415.1 
202514.6 
Thereafter80.2 
Total$145.3 
Schedule of accrued expenses Accrued expenses consist of the following (in millions):
September 30, 2021December 31, 2020
Accrued rebates and customer incentives$19.8 $22.5 
Accrued salaries and wages25.6 36.0 
Accrued taxes1.8 2.7 
Other12.4 22.0 
Total$59.6 $83.2 
Schedule of other long-term liabilities Other long-term liabilities consist of the following (in millions):
September 30, 2021December 31, 2020
Taxes payable$0.4 $0.4 
Accrued compensation and benefits5.0 5.8 
Other4.7 4.8 
Total$10.1 $11.0