Supplemental Balance Sheet Information Supplemental Balance Sheet Information (Tables)

12 Months Ended

Dec. 31, 2017

Organization, Consolidation and Presentation of Financial Statements [Abstract]

Supplemental Balance Sheet Disclosures

Supplemental Balance Sheet Information

	December 31, 2017			December 31, 2016
	(In millions of dollars)
Cash and Cash Equivalents
Cash and money market funds	$	23.5		$	37.9
Commercial paper	27.6			17.3
Total	$	51.1		$	55.2
Trade Receivables, net
Billed trade receivables	$	165.9		$	138.2
Unbilled trade receivables	0.3			0.3
Trade receivables, gross	166.2			138.5
Allowance for doubtful receivables	(1.2		)	(0.8		)
Trade receivables, net	$	165.0		$	137.7
Inventories
Finished products	$	63.8		$	73.8
Work-in-process	78.3			71.7
Raw materials	61.3			51.1
Operating supplies	4.5			5.0
Total	$	207.9		$	201.6
Property, Plant and Equipment, net
Land and improvements	$	21.1		$	22.7
Buildings and leasehold improvements	92.1			88.6
Machinery and equipment	689.1			615.1
Construction in progress	35.1			34.8
Property, plant and equipment – gross	837.4			761.2
Accumulated depreciation	(267.9		)	(230.6		)
Assets held for sale	1.9			0.3
Property, plant and equipment, net	$	571.4		$	530.9
Other Accrued Liabilities
Uncleared cash disbursements	$	7.3		$	5.8
Accrued income taxes and other taxes payable	6.8			4.3
Accrued annual contribution to VEBAs – Note 4	15.7			20.0
Accrued interest	2.9			2.9
Other	7.8			7.1
Total	$	40.5		$	40.1

	December 31, 2017		December 31, 2016
	(In millions of dollars)
Long-Term Liabilities
Workers’ compensation accruals	$	22.6	$	25.0
Long-term environmental accrual – Note 9	15.8		15.8
Long-term portion of contingent contribution to Union VEBA – Note 4	—		12.8
Other long-term liabilities	21.6		19.6
Total	$	60.0	$	73.2

Supplemental Balance Sheet Information

	December 31, 2017			December 31, 2016
	(In millions of dollars)
Cash and Cash Equivalents
Cash and money market funds	$	23.5		$	37.9
Commercial paper	27.6			17.3
Total	$	51.1		$	55.2
Trade Receivables, net
Billed trade receivables	$	165.9		$	138.2
Unbilled trade receivables	0.3			0.3
Trade receivables, gross	166.2			138.5
Allowance for doubtful receivables	(1.2		)	(0.8		)
Trade receivables, net	$	165.0		$	137.7
Inventories
Finished products	$	63.8		$	73.8
Work-in-process	78.3			71.7
Raw materials	61.3			51.1
Operating supplies	4.5			5.0
Total	$	207.9		$	201.6
Property, Plant and Equipment, net
Land and improvements	$	21.1		$	22.7
Buildings and leasehold improvements	92.1			88.6
Machinery and equipment	689.1			615.1
Construction in progress	35.1			34.8
Property, plant and equipment – gross	837.4			761.2
Accumulated depreciation	(267.9		)	(230.6		)
Assets held for sale	1.9			0.3
Property, plant and equipment, net	$	571.4		$	530.9
Other Accrued Liabilities
Uncleared cash disbursements	$	7.3		$	5.8
Accrued income taxes and other taxes payable	6.8			4.3
Accrued annual contribution to VEBAs – Note 4	15.7			20.0
Accrued interest	2.9			2.9
Other	7.8			7.1
Total	$	40.5		$	40.1

	December 31, 2017		December 31, 2016
	(In millions of dollars)
Long-Term Liabilities
Workers’ compensation accruals	$	22.6	$	25.0
Long-term environmental accrual – Note 9	15.8		15.8
Long-term portion of contingent contribution to Union VEBA – Note 4	—		12.8
Other long-term liabilities	21.6		19.6
Total	$	60.0	$	73.2