Supplemental Balance Sheet Information (Tables)

9 Months Ended

Sep. 30, 2020

Organization Consolidation And Presentation Of Financial Statements [Abstract]

Schedule of Supplemental Balance Sheet Information

Supplemental Balance Sheet Information

	September 30, 2020			December 31, 2019
	(In millions of dollars)
Cash and Cash Equivalents
Cash and money market funds	$	750.1		$	28.2
Commercial paper		—			236.1
Total	$	750.1		$	264.3
Trade Receivables, Net
Billed trade receivables	$	119.8		$	168.5
Allowance for doubtful receivables		(0.8	)		(1.4	)
Trade receivables, net	$	119.0		$	167.1
Inventories1
Finished products	$	33.2		$	42.6
Work-in-process		61.9			63.5
Raw materials		55.2			65.0
Operating supplies		7.2			6.5
Total	$	157.5		$	177.6
Property, Plant and Equipment, Net
Land and improvements	$	21.5		$	21.4
Buildings and leasehold improvements		111.8			104.5
Machinery and equipment		836.3			813.5
Construction in progress2		38.2			33.2
Property, plant and equipment, gross		1,007.8			972.6
Accumulated depreciation		(386.6	)		(352.2	)
Assets held for sale		1.7			1.6
Property, plant and equipment, net	$	622.9		$	622.0
Other Accrued Liabilities
Uncleared cash disbursements	$	2.4		$	4.2
Accrued income taxes and taxes payable		8.7			6.2
Accrued annual contribution to Salaried VEBA		—			2.9
Accrued interest		11.7			2.3
Short-term environmental accrual – Note 7		4.5			5.5
Other – Note 3 and Note 53		18.0			22.9
Total	$	45.3		$	44.0
Long-Term Liabilities
Workers' compensation accrual3	$	30.5		$	27.7
Long-term environmental accrual – Note 7		16.2			11.5
Other long-term liabilities		33.6			27.8
Total	$	80.3		$	67.0

^{1 At September 30, 2020, the stated last-in, first-out (“LIFO”) value of our inventory exceeded its current cost by $4.2 million. At December 31, 2019, the current cost of our inventory exceeded its stated LIFO value by $11.9 million.}

^{2 Based on market conditions during the nine months ended September 30, 2020, we temporarily idled projects within Construction in progress totaling $19.9 million as of September 30, 2020, all of which are expected to resume at a future date.}

^{3 Of the workers’ compensation accrual for September 30, 2020 and December 31, 2019, $29.5 million and $26.6 million, respectively, related to our estimate for unpaid claim liabilities, gross of insurance recoverables, and was calculated using a}

discount rate of 0.50% and 1.75%, respectively. The undiscounted estimate of unpaid claim liabilities, gross of insurance recoverables, was $30.4 million and $29.2 million as of September 30, 2020 and December 31, 2019, respectively.