Supplemental Balance Sheet Information (Tables)

3 Months Ended

Mar. 31, 2013

Supplemental Balance Sheet Information [Abstract]

Cash and Cash Equivalents

	March 31, 2013		December 31, 2012
Cash and Cash Equivalents.
Cash and money market funds	$	82.9	$	107.9
Commercial paper	165.1		165.5
Total	$	248.0	$	273.4

Trade Receivables

Trade Receivables.
Billed trade receivables	$	140.1		$	124.4
Unbilled trade receivables	2.5			0.2
Trade receivables, gross	142.6			124.6
Allowance for doubtful receivables	(0.8		)	(0.8		)
Trade receivables, net	$	141.8		$	123.8

Inventories

Inventories.
Finished products	$	61.2	$	59.9
Work-in-process	68.0		55.5
Raw materials	52.8		53.9
Operating supplies and repair and maintenance parts	17.3		16.7
Total	$	199.3	$	186.0

Prepaid Expenses and Other Current Assets

Prepaid Expenses and Other Current Assets.
Current derivative assets – Notes 8 and 9	$	1.5	$	3.0
Current deferred tax assets	59.5		59.5
Current portion of option premiums paid – Notes 8 and 9	0.1		0.1
Short-term restricted cash	1.3		1.3
Prepaid taxes	4.7		2.1
Prepaid expenses	3.9		4.1
Total	$	71.0	$	70.1

Property, Plant and Equipment - Net

Property, Plant and Equipment - Net.
Land and improvements	$	22.6		$	22.6
Buildings and leasehold improvements	51.7			50.9
Machinery and equipment	403.5			400.4
Construction in progress	25.6			20.8
Active property, plant and equipment, gross	503.4			494.7
Accumulated depreciation	(118.0		)	(111.4		)
Active property, plant and equipment, net	385.4			383.3
Idled equipment	1.0			1.0
Total	$	386.4		$	384.3

Other Assets

Other Assets.
Derivative assets – Notes 8 and 9	$	61.8	$	55.5
Restricted cash	10.0		10.0
Long-term income tax receivable	—		2.9
Deferred financing costs	11.0		11.7
Available for sale securities	5.8		5.6
Other	0.2		0.3
Total	$	88.8	$	86.0

Other Accrued Liabilities

Other Accrued Liabilities.
Current derivative liabilities – Notes 8 and 9	$	3.1	$	3.1
Current portion of option premiums received – Notes 8 and 9	0.1		0.1
Accrued book overdraft (uncleared cash disbursement)	5.7		4.7
Accrued income taxes and taxes payable	5.4		3.1
Accrued annual VEBA contribution	—		20.0
Short-term environmental accrual – Note 7	4.7		3.0
Accrued interest	10.3		3.7
Short-term deferred revenue	4.6		6.7
Other	4.5		7.4
Total	$	38.4	$	51.8

Long-term Liabilities

Long-term Liabilities.
Derivative liabilities – Notes 8 and 9	$	68.8	$	63.5
Income tax liabilities	11.9		15.1
Workers’ compensation accruals	23.5		24.0
Long-term environmental accrual – Note 7	17.3		18.7
Long-term asset retirement obligations	3.9		3.8
Deferred compensation liability	6.2		5.8
Long-term capital lease	0.2		0.2
Other long-term liabilities	3.4		3.4
Total	$	135.2	$	134.5

Long-term Debt

Long-term Debt. — Note 3
Senior notes	$	225.0	$	225.0
Cash convertible senior notes	157.3		155.3
Total	$	382.3	$	380.3