Supplemental Balance Sheet Information

12 Months Ended

Dec. 31, 2016

Organization, Consolidation and Presentation of Financial Statements [Abstract]

Supplemental Balance Sheet Information

Supplemental Balance Sheet Information

	December 31, 2016			December 31, 2015
	(In millions of dollars)
Cash and Cash Equivalents
Cash and money market funds	$	37.9		$	40.3
Commercial paper	17.3			32.2
Total	$	55.2		$	72.5
Trade Receivables – Net
Billed trade receivables	$	138.2		$	116.8
Unbilled trade receivables	0.3			0.7
Trade receivables, gross	138.5			117.5
Allowance for doubtful receivables	(0.8		)	(0.8		)
Trade receivables – net	$	137.7		$	116.7
Inventories
Finished products	$	73.8		$	79.5
Work-in-process	71.7			63.6
Raw materials	51.1			53.4
Operating supplies1	5.0			23.1
Total	$	201.6		$	219.6

	December 31, 2016			December 31, 2015
	(In millions of dollars)
Prepaid Expenses and Other Current Assets
Current replacement parts1	$	7.6		$	—
Current derivative assets – Note 10	5.0			1.5
Current deferred tax assets – Note 1	—			49.6
Prepaid insurance	1.9			1.9
Short-term restricted cash	0.3			0.3
Other	3.7			3.4
Total	$	18.5		$	56.7
Property, Plant and Equipment – Net
Land and improvements	$	22.7		$	22.7
Buildings and leasehold improvements	88.6			71.8
Machinery and equipment	615.1			549.0
Construction in progress	34.8			48.5
Property, plant and equipment – gross	761.2			692.0
Accumulated depreciation	(230.6		)	(196.9		)
Assets held for sale	0.3			0.3
Property, plant and equipment – net	$	530.9		$	495.4
Other Assets
Restricted cash	$	12.2		$	10.9
Long-term replacement parts1	11.2			—
Debt issuance costs on Revolving Credit Facility	1.0			1.3
Deferred compensation plan assets	8.2			7.3
Derivative assets – Note 10	0.8			0.1
Total	$	33.4		$	19.6
Other Accrued Liabilities
Current derivative liabilities – Note 10	$	0.8		$	14.1
Uncleared cash disbursements	5.8			8.0
Accrued income taxes and other taxes payable	4.3			3.1
Accrued annual contribution to VEBAs – Note 6	20.0			19.6
Short-term environmental accrual – Note 9	1.4			1.6
Accrued interest	2.9			1.5
Short-term deferred revenue	0.2			1.2
Other	4.5			3.6
Total	$	39.9		$	52.7

	December 31, 2016		December 31, 2015
	(In millions of dollars)
Long-Term Liabilities
Derivative liabilities – Note 10	$	1.0	$	2.1
Income tax liabilities	0.9		0.7
Workers’ compensation accruals	25.0		21.7
Long-term environmental accrual – Note 9	15.8		17.0
Long-term asset retirement obligations	5.3		4.8
Long-term deferred revenue – Note 1	0.1		0.3
Deferred compensation liability	8.2		7.7
Long-term capital leases	0.2		0.1
Long-term portion of contingent contribution to Union VEBA – Note 6	12.8		29.9
Other long-term liabilities	3.9		3.2
Total	$	73.2	$	87.5

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^1.  As replacement parts have become more significant due to our recent major investments in machinery and equipment, we have reclassified a portion of other inventories as of December 31, 2016 to other current and other long-term assets based on expected utilization of the replacement parts.