Supplemental Balance Sheet Information (Tables)

12 Months Ended

Dec. 31, 2019

Organization, Consolidation and Presentation of Financial Statements [Abstract]

Supplemental Balance Sheet Disclosures

	December 31, 2019		December 31, 2018
	(In millions of dollars)
Cash and Cash Equivalents
Cash and money market funds	$	28.2	$	22.9
Commercial paper	236.1		102.7
Total	$	264.3	$	125.6

	December 31, 2019			December 31, 2018
	(In millions of dollars)
Trade Receivables, net
Billed trade receivables	$	168.5		$	179.5
Unbilled trade receivables	—			1.1
Trade receivables, gross	168.5			180.6
Allowance for doubtful receivables	(1.4		)	(0.8		)
Trade receivables, net	$	167.1		$	179.8
Inventories
Finished products	$	42.6		$	48.0
Work-in-process	63.5			85.6
Raw materials	65.0			75.0
Operating supplies	6.5			6.5
Total	$	177.6		$	215.1
Property, Plant and Equipment, net
Land and improvements	$	21.4		$	21.4
Buildings and leasehold improvements	104.5			97.0
Machinery and equipment	813.5			755.6
Construction in progress	33.2			43.6
Property, plant and equipment, gross	972.6			917.6
Accumulated depreciation	(352.2		)	(307.4		)
Assets held for sale	1.6			1.6
Property, plant and equipment, net	$	622.0		$	611.8
Other Accrued Liabilities
Uncleared cash disbursements	$	4.2		$	4.8
Accrued income taxes and other taxes payable	6.2			6.5
Accrued annual contribution to VEBAs – Note 5	2.9			2.1
Accrued interest	2.3			2.9
Short-term environmental accrual – Note 10	5.5			2.6
Other – Note 3 and Note 8	22.9			25.1
Total	$	44.0		$	44.0
Long-Term Liabilities
Workers' compensation accruals	$	27.7		$	24.6
Long-term environmental accrual – Note 10	11.5			14.3
Other long-term liabilities	27.8			27.5
Total	$	67.0		$	66.4